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2B0-023 - ES Advanced Dragon IDS - Dump Information

Vendor : Enterasys
Exam Code : 2B0-023
Exam Name : ES Advanced Dragon IDS
Questions and Answers : 50 Q & A
Updated On : April 18, 2019
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2B0-023 Questions and Answers

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2B0-023 ES Advanced Dragon IDS

Study Guide Prepared by Killexams.com Enterasys Dumps Experts

Exam Questions Updated On :


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2B0-023 exam Dumps Source : ES Advanced Dragon IDS

Test Code : 2B0-023
Test Name : ES Advanced Dragon IDS
Vendor Name : Enterasys
Q&A : 50 Real Questions

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Enterasys ES Advanced Dragon IDS

Enterasys Networks' Dragon Intrusion defense device Named IDS product of the year by means of guidance security journal | killexams.com Real Questions and Pass4sure dumps

ANDOVER, Mass.--(enterprise WIRE)--Dec. 15, 2004--   Award coincides with immediate availability of Dragon 7.0; principal free up marks subsequent technology in IDS/IPS efficiency, manageability and reach  

Enterasys Networks(R) (NYSE: ETS), the secure Networks enterprise(TM), today announced that its Dragon(R) Intrusion defense gadget has gained the Gold award for IDS manufactured from the year from information security magazine. The award is in accordance with the votes of greater than four hundred advice protection professionals.

suggestions safety talked about Dragon "epitomizes the transition of IDSes from 'reactive detection' to 'proactive correlation.' in place of firing off heaps of indicators based on single-node scanning, Dragon makes use of diverse virtual sensors to correlate event statistics from throughout the community and compare it to accumulated information on the networks' vulnerability posture. The technique, managed via Enterasys' Dynamic Intrusion Response (DIR) device, outcomes in more accurate and well timed intrusion administration, as well as fewer false positives."

the honour comes because the company declares the immediate availability of the newest and most finished update within the product's heritage--Dragon 7.0--which establishes a new benchmark in IDS/IPS performance.

The magazine goes on to say that "many agencies are reluctant to put into effect full-scale inline IPS for concern of blockading legit site visitors. Some users suggest that Dragon's passive scanning combined with DIR attack correlation, is a greater good approach."

Dragon obtained the Gold award according to the opinions of convinced consumers, together with the CISO of a government agency who talked about, "Enterasys is an imaginitive company that knows safety, and the way to offer protection to you. it's willing to work with distinct organizational wants."

assistance protection additionally referred to, "Enterasys has converted Dragon from a stand-by myself IDS to the cornerstone of its network security structure."

"or not it's an excellent honor for Dragon and Enterasys to receive such huge business recognition. it be specially pleasing that the winner depends on network and security specialists who take into account what it takes to ensure enterprise continuity with a sturdy and totally secure infrastructure," mentioned Cynthia Gallant, senior vice president, cozy Networks group for Enterasys. "Now, with Dragon 7.0, we are offering much more powerful IDS efficiency to support corporations offer protection to their a must have network belongings from threats and unauthorized access."

The 2004 items of the year awards were according to the effects of interviews with greater than 400 protection managers from 273 agencies. The InfoPro, an impartial analyst enterprise, compiled the results. each seller is judged on its manufacturer or popularity, first-class of product, delivery of product as promised, pleasant of technical assist, technical innovation, strategic vision, aggressive positioning, quality of the income team, interoperability and ease of doing company.

Dragon 7.0

With the immediate availability of Dragon edition 7.0, Enterasys once again raises the bar for commercial enterprise network protection through providing the trade's most powerful intrusion-defense capabilities. Its interesting risk-detection expertise discovers threats, community misuse, system exploits and a big selection of other malicious activities that can disrupt company continuity, costing organisations time and funds and adversely affecting the skill to fulfill customers' wants. current valued clientele and people wishing to consider the product can down load the utility at https://dragon.enterasys.com/.

among the key enhancements in Dragon 7.0 are:

-- subsequent-technology management--consumer-friendly interface with role-based access designed for scalability to meet the needs of firms and managed security service providers. a brand new GUI built on a Java framework in a client-server architecture delivers ease of use, simplified configuration and centralized management of all Dragon facets.

-- high-performance architecture--a brand new multi-threaded structure permits genuine Gigabit-per-2nd efficiency network sensors. The multifaceted engine provides threat detection the usage of advanced signature-based pattern evaluation, anomaly detection and protocol decoding.

-- digital Sensors--enables a single sensor to operate as multiple exciting sensors with enjoyable guidelines and configurations, thereby limiting a customer's should purchase distinct network IDS appliances.

-- net Server Intrusion Prevention--Enterasys' first intrusion-prevention know-how is designed to protect enterprise internet servers. The Dragon internet Intrusion Prevention know-how is essentially the most comprehensive and versatile web server protection product on the market. It screens greater features within http communications than some other product and helps distinctive response capabilities as soon as an assault is found.

The Enterasys comfy Networks talents

Enterasys' industry-leading comfortable Networks expertise and options deliver the optimum stage of infrastructure protection available today. secure Networks provides essentially the most granular stage of protection, featuring visibility and handle down to the community device, individual user and software degree. This allows enterprises to promptly and easily observe, assess, find and offer protection to in opposition t attacks. This unmatched security comes from the integrated policy-primarily based management software architecture that works with the embedded safety capabilities Enterasys designs into its entire product line. This wonderful method presents huge operational and business advantages, unmatched with the aid of vendor choices that add hardware or utility to distinct network access elements in an try to enhance protection. really, comfortable Networks expertise can even make networks with opponents' machine extra at ease.

About Enterasys Networks

Enterasys Networks is the comfy Networks enterprise, presenting commercial enterprise valued clientele with innovative community infrastructure items, functions and options that deliver the safety, productivity and adaptability merits required through international 2000 companies. For extra counsel on Enterasys cozy Networks and the enterprise's items, together with multilayer switches, core routers, WAN routers, wireless LANs, community administration, and intrusion defense methods, consult with www.enterasys.com.

This information free up includes forward-looking statements involving future routine, actions and economic efficiency, such as administration's expectations involving future salary and money circulation; strategic relationships and market alternatives; product development; and different business innovations and pursuits. These statements can be identified with such words as "we are expecting," "we agree with," "we count on," or an identical indications of future expectations. These statements are neither guarantees nor guarantees, and specific future economic performance, routine and actions might also fluctuate materially. Readers are suggested now not to area undue reliance on these statements, which communicate most effective as of the date hereof. We expressly disclaim any responsibility to update such statements publicly to replicate changes in the expectations, assumptions, activities or instances on which such statements may be primarily based or that might also have an effect on the likelihood that exact outcomes will range materially.

Some risks and uncertainties that could cause actual results to vary materially from these forward-looking statements encompass, however are not confined to: global and regional economic uncertainty and recent political and social turmoil may additionally proceed to negatively affect our enterprise and revenue; we've a heritage of losses in recent years and may now not function profitably in the future; our quarterly operating consequences may additionally fluctuate, which might cause us to fail to satisfy quarterly working goals and outcomes in a decline in our inventory rate; we earn a substantial portion of our salary for each quarter in the last month of each and every quarter, which reduces our means to precisely forecast our quarterly results and increases the chance that we may be unable to achieve up to now forecasted outcomes; we continue to introduce new products, and if our clients delay product purchases or opt for option solutions, or if sales of new items aren't satisfactory to offset declines in revenue of older items, our profits could decline, we may additionally incur extra and out of date stock expenses, and our monetary condition can be harmed; we may well be unable to improve our indirect distribution channels or otherwise raise our selling capabilities, which may additionally avoid our capacity to grow our customer base and enhance our profits; we've skilled colossal adjustments in senior management and our existing administration team has been together for only a constrained time, which may restrict our capability to achieve our goals and comfortably function our company; there's severe competition in the market for enterprise community equipment, which may keep away from us from increasing our revenue and attaining profitability; a component of the enterprises we sell to depend in complete or partly on public funding and sometimes face significant budgetary power, and if these purchasers must extend, cut back or forego paying for from us, our revenues may well be harmed; we rely on a limited number of contract producers for noticeably all of our manufacturing requirements, and the loss of any of our primary contract producers would impair our means to satisfy the demands of our clients; and those extra risks and uncertainties discussed in our most recent filings with the Securities and trade fee, together with our annual file on kind 10-okay for the fiscal 12 months ended January three, 2004.


certified ethical Hacker exam Prep | killexams.com Real Questions and Pass4sure dumps

author: Michael GreggPages: 696Publisher: QueISBN: 0789735318

Introduction

This title takes you on a tour of all the areas you should be proficient in to flow the certified ethical Hacker (CEH) examination. if you manage to absorb everything during this e-book, and in keeping with the quality of your ordinary expertise, you might also not deserve to take a category before the examination.

about the writer

Michael Gregg has more than two decades event in the IT field. He at the moment continues the following certifications: CISSP, MCSE, MCT, CTT+, A+, N+, security+, CNA, CCNA, CIW protection Analyst, CCE, CEH, CHFI, CEI, DCNP, ES Dragon IDS, ES advanced Dragon IDS, and TICSA.

inside the booklet

a really vital function of this title is the artful layout that makes certain which you could flick through it instantly to find what you’re trying to find. Notes, suggestions, tables, questions, challenges, summaries – they’re all quite simply identifiable.

originally of each chapter the creator suggests some analyze techniques and in short illustrates all of the topics about to be discussed. This makes shopping chapters fairly painless.

right through the ebook you’ll come throughout quite a lot of examination questions to be able to immediately exhibit you the way a whole lot you’ve discovered about a certain theme. also, there’s a myriad of tips to on-line substances for extra suggestions so that you can go into more element.

The ultimate part of the publication carries a compact version of the most critical assistance from all of the chapters, in addition to a tradition exam. here's here to provide you with an idea of how the precise check appears like.

With the book comes a characteristic packed CD that contains assorted examine modes, explanations of proper and flawed answers and more than a 100 questions that simulate the exam. All in all, a welcome addition to the textual content.

closing techniques

for the reason that outdated adventure within the box is suggested before taking the CEH examination the audience of this e-book may still also have prior capabilities. This ebook does its job quite smartly because it comes packed all the counsel crucial for the examination without providing pointless in-depth details. it is going to effortlessly enable you to brush-up on a plethora of safety subjects and supply you with an instance of how the examination looks like.

if you’re taking the CEH exam, this booklet is neatly worth a look.


conserving SSH Servers with Single Packet Authorization | killexams.com Real Questions and Pass4sure dumps

ultimate month, in the first of a two-half collection, I described the idea in the back of the next generation in passive authentication applied sciences called Single Packet Authorization (SPA). this article receives far from thought and concentrates on the purposeful utility of SPA with fwknop and iptables to offer protection to SSHD from reconnaissance and assault. With this setup on a Linux device, no one should be able to tell that SSHD is even listening below an nmap scan, and most effective authenticated and certified purchasers might be able to speak with SSHD.

To start, we require some suggestions about configuration and community architecture. this article assumes you have installed the latest version of fwknop (1.0.1 at the time of this writing) on the equal system where SSHD and iptables are operating. you can download fwknop from www.cipherdyne.org/fwknop and installation both from the supply tar archive with the aid of working the install.pl script or by the use of the RPM for RPM-primarily based Linux distributions.

community structure

The fundamental community depicted in determine 1 illustrates our setup. The fwknop customer is achieved on the host labeled spa_client (15.1.1.1), and the fwknop server (together with iptables) runs on the device labeled spa_server (sixteen.2.2.2). A malicious device is labeled attacker (18.three.3.three), which is capable of sniff all traffic between the spa_client and spa_server methods.

determine 1. sample state of affairs where you use SPA to offer protection to SSH Communications

Default-Drop iptables policy

The spa_client equipment has the IP handle 15.1.1.1, and the spa_server device has the IP address 16.2.2.2. On the spa_server device, iptables is configured to deliver simple connectivity functions for the inside community (192.168.10.0/24) and to log and drop all makes an attempt (by way of the iptables LOG and DROP objectives) from the exterior network to connect with any provider on the firewall itself. This coverage is fairly simplistic, and it's supposed to reveal most effective that the firewall doesn't advertise any features (including SSHD) below an nmap scan. Any serious deployment of iptables for a real network would be tremendously extra complicated. One vital function to be aware, however, is that the connection monitoring facilities offered by means of Netfilter are used to retain state within the iptables policy. The culmination is that connections initiated throughout the firewall (by way of the ahead chain) and to the firewall (by means of the input chain) stay open without extra accept guidelines to enable packets required to retain the connections dependent (reminiscent of TCP acknowledgements and the like). The iptables policy is built with right here primary firewall.sh script:

[spa_server]# cat firewall.sh #!/bin/sh IPTABLES=/sbin/iptables $IPTABLES -F $IPTABLES -F -t nat $IPTABLES -X $IPTABLES -A input -m state --state ↪based,linked -j accept $IPTABLES -A forward -m state --state ↪established,connected -j settle for $IPTABLES -t nat -A POSTROUTING -s ↪192.168.10.0/24 -o eth0 -j MASQUERADE $IPTABLES -A enter -i ! lo -j LOG --log-prefix ↪"DROP " $IPTABLES -A input -i ! lo -j DROP $IPTABLES -A forward -i ! lo -j LOG --log-prefix ↪"DROP " $IPTABLES -A forward -i ! lo -j DROP echo 1 > /proc/sys/net/ipv4/ip_forward echo "[+] iptables coverage activated" exit [spa_server]# ./firewall.sh [+] iptables coverage activated

With iptables energetic, it is time to see what remote access we could have. From the spa_client equipment, we use nmap to see if SSHD is obtainable on the spa_server system:

[spa_client]$ nmap -P0 -sT -p 22 sixteen.2.2.2 beginning Nmap 4.01 ( http://www.insecure.org/nmap/ ) at 2007-02-09 23:55 EST entertaining ports on sixteen.2.2.2: PORT STATE carrier 22/tcp filtered ssh Nmap finished: 1 IP handle (1 host up) scanned in 12.009 seconds

As anticipated, iptables is blocking all attempts to communicate with SSHD, and the last ports (both TCP and UDP) are in a similar way included by way of the iptables policy. It does not rely if an attacker has a nil-day exploit for the specific version of OpenSSH it's deployed on the spa_server device; all attempts to talk up the stack are being blocked by using iptables.

fwknop SPA Configuration

confident that iptables is protecting the native community with a Draconian stance, it is time to configure the fwknop server dæmon (fwknopd) on the spa_server gadget. The file /and so on/fwknop/fwknop.conf controls crucial configuration parameters, such as the interface on which fwknopd sniffs site visitors by means of libpcap, the e-mail handle(es) to which fwknopd sends informational signals and the pcap filter observation designed to smell SPA packets off the wire. via default, fwknop sends SPA packets over UDP port 62201, so the pcap filter observation in /and so forth/fwknop/fwknop.conf is decided to udp port 62201 by using default. besides the fact that children, SPA packets can also be despatched over any port and protocol (even over ICMP), but the filter commentary would should be up-to-date to handle SPA communications over other port/protocols. more counsel may also be present in the fwknop man page. despite the fact the defaults during this file usually make feel for many deployments, you may wish to tweak the PCAP_INTF and EMAIL_ADDRESSES variables on your selected setup.

The /and so forth/fwknop/access.conf file is the most crucial fwknopd configuration file—it manages the encryption keys and access handle rights used to validate SPA packets from fwknop valued clientele. here access.conf file is used for the remainder of this article:

[spa_server]# cat /and many others/fwknop/entry.conf source: ANY; OPEN_PORTS: tcp/22; FW_ACCESS_TIMEOUT: 30; KEY: LJ07p2rbga; GPG_DECRYPT_ID: ABCD1234; GPG_DECRYPT_PW: p2atc1l30p; GPG_REMOTE_ID: 5678DEFG; GPG_HOME_DIR: /root/.gnupg;

The source variable defines the IP addresses from which fwknopd accepts SPA packets. The price ANY shown above is a wild card to assess SPA packets from any IP handle, nevertheless it can be restrained to particular IP addresses or subnets, and comma-separated lists are supported (as an example, 192.168.10.0/24, 15.1.1.1). The OPEN_PORTS variable informs fwknopd about the set of ports that may still be opened upon receiving a valid SPA packet; during this case, fwknopd will open TCP port 22.

however no longer proven above, fwknopd can be configured to allow the fwknop client to dictate the set of ports to open by including the PERMIT_CLIENT_PORTS variable and atmosphere it to Y. FW_ACCESS_TIMEOUT specifies the length of time that an accept rule is added to the iptables coverage to enable the site visitors described by means of the OPEN_PORTS variable. because the iptables policy in the firewall.sh script above makes use of the connection tracking capabilities provided by means of Netfilter, an SSH connection will stay based after the preliminary accept rule is deleted via fwknopd.

The remaining variables outline parameters for the encryption and decryption of SPA packets. this text illustrates the utilization of both symmetric and asymmetric ciphers, but just one encryption vogue is required through fwknop.

the entire GPG_* variables may also be disregarded if there is a KEY variable and vice versa. the key variable defines a shared key between the fwknop customer and fwknopd server. This secret's used to encrypt/decrypt the SPA packet with the Rijndael symmetric block cipher (see supplies). For uneven encryption, GPG_DECRYPT_ID defines the local fwknopd server GnuPG key identity. This secret's used with the aid of the fwknop client to encrypt SPA packets via an encryption algorithm supported by means of GnuPG (such because the ElGamal cipher).

GPG_DECRYPT_PW is the decryption password linked to the fwknopd server key. as a result of this password is positioned in the access.conf file in clear textual content, it is not informed to make use of a useful GnuPG key for the server; a committed key should still be generated for the intention of decrypting SPA packets. The fwknop customers signal SPA packets with a GnuPG key on the native key ring, and the password is provided by means of the person from the command line and by no means kept within a file (as we can see under). hence, any GnuPG key will also be used via the fwknop client; even a beneficial key used for encrypting delicate e mail communications, for instance.

The GPG_REMOTE_ID variable defines a list of key IDs that the fwknopd server will accept. Any SPA packet encrypted with the fwknopd server public key have to be signed with a personal key precise with the aid of the GPG_REMOTE_ID variable. This allows fwknopd to preclude the set of individuals who can profit entry to a protected service (SSHD in our case) by way of a cryptographically robust mechanism. guidelines for developing GnuPG keys to be used with fwknop can be found at www.cipherdyne.org/fwknop/docs/gpghowto.html.

With the /and many others/fwknop/entry.conf file built, it is time to beginning fwknopd on the spa_server system and put fwknop to work for us:

[spa_server]# /and many others/init.d/fwknop start * beginning fwknop ... [ ok ]

SPA by the use of Symmetric Encryption

On the spa_client equipment, we use fwknop to build an SPA packet encrypted by way of Rijndael and send it on its strategy to the spa_server device. We desire entry to SSHD, and the -A argument below encodes the desired entry within the SPA packet. The -w argument resolves the IP address of the customer system by way of querying http://www.whatismyip.com (here is effective if the fwknop client is at the back of a NAT equipment), the -k argument is the IP handle of the destination SPA server, and -v runs in verbose mode with a purpose to view the uncooked packet facts:

[spa_client]$ fwknop -A tcp/22 -w -okay 16.2.2.2 -v [+] beginning fwknop in client mode. Resolving external IP by the use of: http://www.whatismyip.com/ bought external tackle: 15.1.1.1 [+] Enter an encryption key. This key should fit a key in the file /and so forth/fwknop/access.conf on the far flung system. Encryption Key: [+] building encrypted single-packet authorization (SPA) message... [+] Packet fields: Random statistics: 7764880827899123 Username: mbr Timestamp: 1171133745 edition: 1.0.1 action: 1 (access mode) access: 15.1.1.1,tcp/22 MD5 sum: yzxKgnAxwUA5M2YhI8NTFQ [+] Packet statistics: U2FsdGVkX1+BvzxXj5Zv6gvfCFXwJ+iJGKPqe2whdYzyigkerSp \ 2WtvON/xTd8t6V6saxbg1v4zsK+YNt53BE8EInxVCgpD7y/gEBI \ g8sd+AvU1ekQh9vwJJduseVxDxjmAHx3oNnClo2wckBqd8zA [+] Sending 150 byte message to sixteen.2.2.2 over udp/62201...

As that you can see from the Packet records section above, the SPA packet is a totally unintelligible blob of encrypted facts. On the spa_server gadget, right here syslog message is generated indicating that an settle for rule has been introduced for the supply IP (15.1.1.1) that generated the SPA packet. be aware that the source IP is put within the SPA packet by using the fwknop client. during this case, the SPA packet became not spoofed, so the actual source address and the supply tackle embedded in the SPA packet suit. SPA packets may also be spoofed via fwknop with the --Spoof-src command-line argument (requires root):

Feb 10 13:fifty five:forty four spa_server fwknopd: bought valid Rijndael \ encrypted packet from: 15.1.1.1, far off consumer: mbr Feb 10 13:55:forty four spa_server fwknopd: adding FWKNOP_INPUT settle for \ rule for 15.1.1.1 -> tcp/22 (30 seconds)

So, for 30 seconds after sending the SPA packet, the iptables policy on the spa_server allows for the spa_client device to set up an SSH session:

[spa_client]$ ssh -l mbr sixteen.2.2.2 mbr@spa_server's password:

After 30 seconds has expired, knoptm (a dæmon responsible for deleting iptables rules introduced with the aid of fwknopd to the iptables policy) deletes the accept rule and writes right here messages to syslog:

Feb 10 13:fifty two:17 spa_server knoptm: eliminated iptables \ FWKNOP_INPUT settle for rule for 15.1.1.1 -> tcp/22, \ 30 2nd timeout exceeded

Our SSH session continues to be dependent after the settle for rule is deleted as a result of the state tracking guidelines in the iptables coverage (see the firewall.sh script above). These rules enable packets which are a part of a longtime TCP connection to move unimpeded.

SPA by way of uneven Encryption

to make use of GnuPG to encrypt and sign an SPA packet, that you may execute the fwknop command under. in this case, the key id of the fwknopd server is precise on the command line with the --gpg-recipient argument, and the key identification used to sign the SPA packet is given with the --gpg-signing-key argument (the output beneath has been abbreviated):

[spa_client]$ fwknop -A tcp/22 --gpg-recipient ABCD1234 \ --gpg-signing-key 5678DEFG -w -ok 16.2.2.2 [+] Sending 1010 byte message to sixteen.2.2.2 over udp/62201

As which you can see, the size of the utility component of the SPA packet has elevated to greater than 1,000 bytes, whereas it become only a hundred and fifty bytes for the Rijndael illustration. this is because the key length of GnuPG keys (during this case 2,048 bits) and the qualities of asymmetric ciphers tend to inflate the measurement of small chunks of facts after being encrypted. There isn't any strict correspondence between the size of clear-textual content and cipher-textual content records as in block ciphers such as Rijndael.

once again, on the spa_server device, fwknop provides the accept rule for us. This time fwknopd reports that the SPA packet is encrypted with GnuPG, and that a sound signature for the required key identity 5678DEFG is discovered:

Feb 10 14:38:26 spa_server fwknopd: got valid GnuPG encrypted packet (signed with required key id: "5678DEFG") from: 15.1.1.1, far off user: mbr Feb 10 14:38:26 spa_server fwknopd: adding FWKNOP_INPUT settle for rule for 15.1.1.1 -> tcp/22 (30 seconds)

Thwarting a Replay attack

believe that the SPA packet from the first instance above was sniffed off the wire en route by means of a crafty particular person on the device labeled attacker within the community diagram in determine 1. The SPA packet always can be positioned returned on the wire with a view to benefit the same access as the usual packet—here's referred to as a replay attack. There are a few how to purchase the packet facts and replay it. probably the most common is to make use of tcpdump to jot down a pcap file (during this case tcpdump -i eth0 -l -nn -s 0 -w SPA.pcap port 62201 would work) after which use tcpreplay (see tcpreplay.synfin.web/trac) to copy the SPA packet again onto the wire. another method, after the packet has been captured, is to use the echo command together with netcat:

[attacker]$ echo "U2FsdGVkX1+BvzxXj5Zv6gvfCFXwJ+iJGKP \ qe2whdYzyigkerSp2WtvON/xTd8t6V6saxbg1v4zsK+YNt53BE8EI \ nxVCgpD7y/gEBIg8sd+AvU1ekQh9vwJJduseVx \ DxjmAHx3oNnClo2wckBqd8zA" |nc -u sixteen.2.2.2 62201

On the fwknopd server, the duplicate SPA packet is monitored, but because the MD5 sum fits that of the fashioned SPA packet, no entry is granted, and the following message is written to syslog on the spa_server system:

Feb 10 14:14:24 spa_server fwknopd: attempted \ message replay from: 18.3.three.3

Conclusion

Single Packet Authorization provides an additional layer of safety for features corresponding to SSHD, and this accretion strikes at the first step that an attacker need to accomplish when trying to compromise a gadget: reconnaissance. through the use of iptables in a default-drop stance and fwknop to sniff the wire for peculiarly constructed (it truly is, encrypted and non-replayed) packets, it is intricate even to tell that a provider is listening, let alone speak with it. The culmination is that it's drastically harder to take advantage of any vulnerabilities a protected provider might have.

supplies

fwknop: www.cipherdyne.org/fwknop

an excellent source of further theoretical advice about each port knocking and Single Packet Authorization will also be present in Sebastien Jeanquier's master's thesis at the Royal Holloway school, university of London. The thesis can also be downloaded from net.mac.com/s.j, and it includes a brilliant argument for why SPA isn't “safety via obscurity”.

The Rijndael cipher became chosen in 2001 for the advanced Encryption usual (AES) as the successor to the getting older facts Encryption ordinary (DES). a great writeup may also be discovered at en.wikipedia.org/wiki/Advanced_Encryption_Standard.

GnuPG is the GNU privacy take care of, and is an open-supply implementation of the OpenPGP commonplace. extra assistance can also be found at www.gnupg.org.


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Protecting SSH Servers with Single Packet Authorization | killexams.com real questions and Pass4sure dumps

Last month, in the first of a two-part series, I described the theory behind the next generation in passive authentication technologies called Single Packet Authorization (SPA). This article gets away from theory and concentrates on the practical application of SPA with fwknop and iptables to protect SSHD from reconnaissance and attack. With this setup on a Linux system, no one will be able to tell that SSHD is even listening under an nmap scan, and only authenticated and authorized clients will be able to communicate with SSHD.

To begin, we require some information about configuration and network architecture. This article assumes you have installed the latest version of fwknop (1.0.1 at the time of this writing) on the same system where SSHD and iptables are running. You can download fwknop from www.cipherdyne.org/fwknop and install either from the source tar archive by running the install.pl script or via the RPM for RPM-based Linux distributions.

Network Architecture

The basic network depicted in Figure 1 illustrates our setup. The fwknop client is executed on the host labeled spa_client (15.1.1.1), and the fwknop server (along with iptables) runs on the system labeled spa_server (16.2.2.2). A malicious system is labeled attacker (18.3.3.3), which is able to sniff all traffic between the spa_client and spa_server systems.

Figure 1. Sample Scenario Where You Use SPA to Protect SSH Communications

Default-Drop iptables Policy

The spa_client system has the IP address 15.1.1.1, and the spa_server system has the IP address 16.2.2.2. On the spa_server system, iptables is configured to provide basic connectivity services for the internal network (192.168.10.0/24) and to log and drop all attempts (via the iptables LOG and DROP targets) from the external network to connect to any service on the firewall itself. This policy is quite simplistic, and it is meant to show only that the firewall does not advertise any services (including SSHD) under an nmap scan. Any serious deployment of iptables for a real network would be significantly more complicated. One important feature to note, however, is that the connection tracking facilities provided by Netfilter are used to keep state in the iptables policy. The end result is that connections initiated through the firewall (via the FORWARD chain) and to the firewall (via the INPUT chain) remain open without additional ACCEPT rules to allow packets required to keep the connections established (such as TCP acknowledgements and the like). The iptables policy is built with the following basic firewall.sh script:

[spa_server]# cat firewall.sh #!/bin/sh IPTABLES=/sbin/iptables $IPTABLES -F $IPTABLES -F -t nat $IPTABLES -X $IPTABLES -A INPUT -m state --state ↪ESTABLISHED,RELATED -j ACCEPT $IPTABLES -A FORWARD -m state --state ↪ESTABLISHED,RELATED -j ACCEPT $IPTABLES -t nat -A POSTROUTING -s ↪192.168.10.0/24 -o eth0 -j MASQUERADE $IPTABLES -A INPUT -i ! lo -j LOG --log-prefix ↪"DROP " $IPTABLES -A INPUT -i ! lo -j DROP $IPTABLES -A FORWARD -i ! lo -j LOG --log-prefix ↪"DROP " $IPTABLES -A FORWARD -i ! lo -j DROP echo 1 > /proc/sys/net/ipv4/ip_forward echo "[+] iptables policy activated" exit [spa_server]# ./firewall.sh [+] iptables policy activated

With iptables active, it is time to see what remote access we might have. From the spa_client system, we use nmap to see if SSHD is accessible on the spa_server system:

[spa_client]$ nmap -P0 -sT -p 22 16.2.2.2 Starting Nmap 4.01 ( http://www.insecure.org/nmap/ ) at 2007-02-09 23:55 EST Interesting ports on 16.2.2.2: PORT STATE SERVICE 22/tcp filtered ssh Nmap finished: 1 IP address (1 host up) scanned in 12.009 seconds

As expected, iptables is blocking all attempts to communicate with SSHD, and the remaining ports (both TCP and UDP) are similarly protected by the iptables policy. It does not matter if an attacker has a zero-day exploit for the particular version of OpenSSH that is deployed on the spa_server system; all attempts to communicate up the stack are being blocked by iptables.

fwknop SPA Configuration

Confident that iptables is protecting the local network with a Draconian stance, it is time to configure the fwknop server dæmon (fwknopd) on the spa_server system. The file /etc/fwknop/fwknop.conf controls important configuration parameters, such as the interface on which fwknopd sniffs traffic via libpcap, the e-mail address(es) to which fwknopd sends informational alerts and the pcap filter statement designed to sniff SPA packets off the wire. By default, fwknop sends SPA packets over UDP port 62201, so the pcap filter statement in /etc/fwknop/fwknop.conf is set to udp port 62201 by default. However, SPA packets can be sent over any port and protocol (even over ICMP), but the filter statement would need to be updated to handle SPA communications over other port/protocols. More information can be found in the fwknop man page. Although the defaults in this file usually make sense for most deployments, you may need to tweak the PCAP_INTF and EMAIL_ADDRESSES variables for your particular setup.

The /etc/fwknop/access.conf file is the most important fwknopd configuration file—it manages the encryption keys and access control rights used to validate SPA packets from fwknop clients. The following access.conf file is used for the remainder of this article:

[spa_server]# cat /etc/fwknop/access.conf SOURCE: ANY; OPEN_PORTS: tcp/22; FW_ACCESS_TIMEOUT: 30; KEY: LJ07p2rbga; GPG_DECRYPT_ID: ABCD1234; GPG_DECRYPT_PW: p2atc1l30p; GPG_REMOTE_ID: 5678DEFG; GPG_HOME_DIR: /root/.gnupg;

The SOURCE variable defines the IP addresses from which fwknopd accepts SPA packets. The value ANY shown above is a wild card to examine SPA packets from any IP address, but it can be restricted to specific IP addresses or subnets, and comma-separated lists are supported (for example, 192.168.10.0/24, 15.1.1.1). The OPEN_PORTS variable informs fwknopd about the set of ports that should be opened upon receiving a valid SPA packet; in this case, fwknopd will open TCP port 22.

Although not shown above, fwknopd can be configured to allow the fwknop client to dictate the set of ports to open by including the PERMIT_CLIENT_PORTS variable and setting it to Y. FW_ACCESS_TIMEOUT specifies the length of time that an ACCEPT rule is added to the iptables policy to allow the traffic defined by the OPEN_PORTS variable. Because the iptables policy in the firewall.sh script above makes use of the connection tracking capabilities provided by Netfilter, an SSH connection will remain established after the initial ACCEPT rule is deleted by fwknopd.

The remaining variables define parameters for the encryption and decryption of SPA packets. This article illustrates the usage of both symmetric and asymmetric ciphers, but only one encryption style is required by fwknop.

All of the GPG_* variables can be omitted if there is a KEY variable and vice versa. The KEY variable defines a shared key between the fwknop client and fwknopd server. This key is used to encrypt/decrypt the SPA packet with the Rijndael symmetric block cipher (see Resources). For asymmetric encryption, GPG_DECRYPT_ID defines the local fwknopd server GnuPG key ID. This key is used by the fwknop client to encrypt SPA packets via an encryption algorithm supported by GnuPG (such as the ElGamal cipher).

GPG_DECRYPT_PW is the decryption password associated with the fwknopd server key. Because this password is placed within the access.conf file in clear text, it is not recommended to use a valuable GnuPG key for the server; a dedicated key should be generated for the purpose of decrypting SPA packets. The fwknop clients sign SPA packets with a GnuPG key on the local key ring, and the password is supplied by the user from the command line and never stored within a file (as we will see below). Hence, any GnuPG key can be used by the fwknop client; even a valuable key used for encrypting sensitive e-mail communications, for example.

The GPG_REMOTE_ID variable defines a list of key IDs that the fwknopd server will accept. Any SPA packet encrypted with the fwknopd server public key must be signed with a private key specified by the GPG_REMOTE_ID variable. This allows fwknopd to restrict the set of people who can gain access to a protected service (SSHD in our case) via a cryptographically strong mechanism. Instructions for creating GnuPG keys for use with fwknop can be found at www.cipherdyne.org/fwknop/docs/gpghowto.html.

With the /etc/fwknop/access.conf file built, it is time to start fwknopd on the spa_server system and put fwknop to work for us:

[spa_server]# /etc/init.d/fwknop start * Starting fwknop ... [ ok ]

SPA via Symmetric Encryption

On the spa_client system, we use fwknop to build an SPA packet encrypted via Rijndael and send it on its way to the spa_server system. We want access to SSHD, and the -A argument below encodes the desired access within the SPA packet. The -w argument resolves the IP address of the client system by querying http://www.whatismyip.com (this is useful if the fwknop client is behind a NAT device), the -k argument is the IP address of the destination SPA server, and -v runs in verbose mode so we can view the raw packet data:

[spa_client]$ fwknop -A tcp/22 -w -k 16.2.2.2 -v [+] Starting fwknop in client mode. Resolving external IP via: http://www.whatismyip.com/ Got external address: 15.1.1.1 [+] Enter an encryption key. This key must match a key in the file /etc/fwknop/access.conf on the remote system. Encryption Key: [+] Building encrypted single-packet authorization (SPA) message... [+] Packet fields: Random data: 7764880827899123 Username: mbr Timestamp: 1171133745 Version: 1.0.1 Action: 1 (access mode) Access: 15.1.1.1,tcp/22 MD5 sum: yzxKgnAxwUA5M2YhI8NTFQ [+] Packet data: U2FsdGVkX1+BvzxXj5Zv6gvfCFXwJ+iJGKPqe2whdYzyigkerSp \ 2WtvON/xTd8t6V6saxbg1v4zsK+YNt53BE8EInxVCgpD7y/gEBI \ g8sd+AvU1ekQh9vwJJduseVxDxjmAHx3oNnClo2wckBqd8zA [+] Sending 150 byte message to 16.2.2.2 over udp/62201...

As you can see from the Packet data section above, the SPA packet is a completely unintelligible blob of encrypted data. On the spa_server system, the following syslog message is generated indicating that an ACCEPT rule has been added for the source IP (15.1.1.1) that generated the SPA packet. Note that the source IP is put within the SPA packet by the fwknop client. In this case, the SPA packet was not spoofed, so the real source address and the source address embedded in the SPA packet match. SPA packets can be spoofed by fwknop with the --Spoof-src command-line argument (requires root):

Feb 10 13:55:44 spa_server fwknopd: received valid Rijndael \ encrypted packet from: 15.1.1.1, remote user: mbr Feb 10 13:55:44 spa_server fwknopd: adding FWKNOP_INPUT ACCEPT \ rule for 15.1.1.1 -> tcp/22 (30 seconds)

So, for 30 seconds after sending the SPA packet, the iptables policy on the spa_server allows the spa_client system to establish an SSH session:

[spa_client]$ ssh -l mbr 16.2.2.2 mbr@spa_server's password:

After 30 seconds has expired, knoptm (a dæmon responsible for deleting iptables rules added by fwknopd to the iptables policy) deletes the ACCEPT rule and writes the following messages to syslog:

Feb 10 13:52:17 spa_server knoptm: removed iptables \ FWKNOP_INPUT ACCEPT rule for 15.1.1.1 -> tcp/22, \ 30 second timeout exceeded

Our SSH session remains established after the ACCEPT rule is deleted because of the state tracking rules in the iptables policy (see the firewall.sh script above). These rules allow packets that are part of an established TCP connection to pass unimpeded.

SPA via Asymmetric Encryption

To use GnuPG to encrypt and sign an SPA packet, you can execute the fwknop command below. In this case, the key ID of the fwknopd server is specified on the command line with the --gpg-recipient argument, and the key ID used to sign the SPA packet is given with the --gpg-signing-key argument (the output below has been abbreviated):

[spa_client]$ fwknop -A tcp/22 --gpg-recipient ABCD1234 \ --gpg-signing-key 5678DEFG -w -k 16.2.2.2 [+] Sending 1010 byte message to 16.2.2.2 over udp/62201

As you can see, the length of the application portion of the SPA packet has increased to more than 1,000 bytes, whereas it was only 150 bytes for the Rijndael example. This is because the key length of GnuPG keys (in this case 2,048 bits) and the characteristics of asymmetric ciphers tend to inflate the size of small chunks of data after being encrypted. There is no strict correspondence between the size of clear-text and cipher-text data as in block ciphers such as Rijndael.

Again, on the spa_server system, fwknop adds the ACCEPT rule for us. This time fwknopd reports that the SPA packet is encrypted with GnuPG, and that a valid signature for the required key ID 5678DEFG is found:

Feb 10 14:38:26 spa_server fwknopd: received valid GnuPG encrypted packet (signed with required key ID: "5678DEFG") from: 15.1.1.1, remote user: mbr Feb 10 14:38:26 spa_server fwknopd: adding FWKNOP_INPUT ACCEPT rule for 15.1.1.1 -> tcp/22 (30 seconds)

Thwarting a Replay Attack

Suppose that the SPA packet from the first example above was sniffed off the wire en route by a crafty individual on the system labeled attacker in the network diagram in Figure 1. The SPA packet always can be placed back on the wire in an effort to gain the same access as the original packet—this is known as a replay attack. There are several ways to acquire the packet data and replay it. One of the most common is to use tcpdump to write a pcap file (in this case tcpdump -i eth0 -l -nn -s 0 -w SPA.pcap port 62201 would work) and then use tcpreplay (see tcpreplay.synfin.net/trac) to copy the SPA packet back onto the wire. Another method, after the packet has been captured, is to use the echo command along with netcat:

[attacker]$ echo "U2FsdGVkX1+BvzxXj5Zv6gvfCFXwJ+iJGKP \ qe2whdYzyigkerSp2WtvON/xTd8t6V6saxbg1v4zsK+YNt53BE8EI \ nxVCgpD7y/gEBIg8sd+AvU1ekQh9vwJJduseVx \ DxjmAHx3oNnClo2wckBqd8zA" |nc -u 16.2.2.2 62201

On the fwknopd server, the duplicate SPA packet is monitored, but because the MD5 sum matches that of the original SPA packet, no access is granted, and the following message is written to syslog on the spa_server system:

Feb 10 14:14:24 spa_server fwknopd: attempted \ message replay from: 18.3.3.3

Conclusion

Single Packet Authorization provides an additional layer of security for services such as SSHD, and this layer strikes at the first step that an attacker must accomplish when trying to compromise a system: reconnaissance. By using iptables in a default-drop stance and fwknop to sniff the wire for specially constructed (that is, encrypted and non-replayed) packets, it is difficult even to tell that a service is listening, let alone communicate with it. The end result is that it is significantly harder to exploit any vulnerabilities a protected service might have.

Resources

fwknop: www.cipherdyne.org/fwknop

An excellent source of additional theoretical information about both port knocking and Single Packet Authorization can be found in Sebastien Jeanquier's Master's thesis at the Royal Holloway College, University of London. The thesis can be downloaded from web.mac.com/s.j, and it includes an excellent argument for why SPA is not “security through obscurity”.

The Rijndael cipher was selected in 2001 for the Advanced Encryption Standard (AES) as the successor to the aging Data Encryption Standard (DES). A good writeup can be found at en.wikipedia.org/wiki/Advanced_Encryption_Standard.

GnuPG is the GNU Privacy Guard, and is an open-source implementation of the OpenPGP standard. More information can be found at www.gnupg.org.


Raytheon Developing New Version Of Advanced Synthetic Aperture Radar | killexams.com real questions and Pass4sure dumps

Sat, Mar 30, 2019

Raytheon is developing a new version of the Advanced Synthetic Aperture Radar that flies on the U-2 Dragon Lady aircraft under a $320 million undefinitized contract from the U.S. Air Force.

Equipped with an active electronically scanned array antenna, ASARS-2B doubles the surveillance range while maintaining the mapping and imagery resolution of the current ASARS-2A system. ASARS-2B completed flight test at Edwards Air Force Base in California in early 2019.

"ASARS-2B allows the Dragon Lady to see further than ever before," said Eric Ditmars, vice president of Raytheon Secure Sensor Solutions. "That kind of range is crucial for commanders to achieve decision superiority - and it ensures that the U-2 remains a preferred option for manned airborne surveillance operations."

ASARS-2B is a high-resolution, multimode, long-range, air-to-ground radar that provides operators with critical intelligence, surveillance and reconnaissance data. Capable of operating in all weather, day or night, ASARS detects and precisely locates fixed and moving targets on the ground.

(Source: Raytheon news release. Image from file)

FMI: www.raytheon.com

Tanzanian Passport Wins Award at HSP Europe, Showcasing HID Global’s Citizen ID Solutions | killexams.com real questions and Pass4sure dumps

HID Global [®] , a worldwide leader in trusted identity solutions, today announced that the new Tanzania e-Passport, designed and delivered by HID Global and partners, has been honored with a major award at the High Security Printing conference in Europe this week.

The award win is part of the Tanzania e-Immigration program being widely recognized as one that is transforming the immigration system of this African nation. Tanzania moved from a traditional MRP booklet to a complete e-Immigration system – and it did it in record time. In just four months, Tanzania transitioned from awarding the contract to HID Global and its partners, SmurfitKappa Security Concepts (previously DLRSGroupSecurity Concepts), Absolute Graphics and Softnet, to completion.

The Tanzanian e-Passport is a state-of-the-art document that features a polycarbonate datapage. The design of the booklet captures local themes and cultures across the visa pages, datapage and end papers, helping to generate a sense of national pride in the passport holder.

“The success of the Tanzanian e-Immigration program started with a vision by the country’s leaders to work with best-in-class solution providers, and we are honored that HID Global was selected based on our proven leadership in citizen ID programs,” said Steve Warne, Senior Director, Product Marketing, Citizen ID business with HID Global. “The award for the Tanzanian e-Passport reflects on the team effort that it took from forward-thinking government officials, to our partners, to our internal HID team. Tanzania’s e-Passport is being recognized as a breakthrough example of a next-generation citizen ID.”

Since early 2018, HID Global has been Tanzania’s primary supplier of an end-to-end solution for issuing e-Passports with advanced physical and electronic security features, automated verification capabilities and, importantly, a contactless chip embedded in the polycarbonate datapage.

The country now has a single citizen identification system that spans the entire identity journey from data capture to issuance and can be used to support e-Passports, e-Visas, e-Permits and other physical electronic documents. The solution is also “future ready,” anticipating the requirements of the next generation of identities.

HID’s solutions can be found in sixty percent of all government-issued electronic identity projects around the world. As a solutions provider, HID is delivering complete, end-to-end system solutions that meet governmental requirements for national ID, e-Passport, foreign resident ID, driver license, vehicle registration and other programs.

To learn more about the HID Global’s citizen identification offerings, please click here.

Stay Connected with HID Global

Visit ourMedia Center, read ourIndustry Blog, and follow us onFacebook,LinkedInandTwitter.

About SmurfitKappa Security Concepts

SmurfitKappa Security Concepts (previously (DLRSGroupSecurity Concepts) is Ireland’s leading security printer. Established since 1976, the company has a production facility in the Republic of Ireland servicing the needs of major financial and government bodies. Smurfit Kappa Security Concerts iswholly ownedby Smurfit Kappa Group and is the market leader in security printed products, with over25years’ experience in passport manufacture and design. The company’s reputation for quality and service is matched only by its reputation for unrivalled integrity, developed through working closely with governments for over 30 years. Smurfit Kappa Security Concepts is accredited toISO9001:2015 the quality standard, ISO14001:2015: environmental management and ISO27001:2013: the IS security standard and ISO14298:2013the Intergraf Security Printing Standard. More information can be found at: www.smurfitkappasecurityconcepts.comor contact salessksecurityconcepts@smurfitkappa.ie

About AG2

AG2 (the security arm of Absolute Graphics) is aninternationally recognised design company specialising in the Passport and Secure Documents sector. Established since 2003, AG2 has won international acclaim for both the Irish Passport and the Irish Passport Card and is a well-established player in the Secure Document design arena. info@ag2.ie Website:http://ag2.ie

About HID Global

HID Global powers the trusted identities of the world’s people, places and things. We make it possible for people to transact safely, work productively and travel freely. Our trusted identity solutions givepeopleconvenient access to physical and digitalplacesand connectthingsthat can be identified, verified and tracked digitally. Millions of people around the world use HID products and services to navigate their everyday lives, and over 2 billion things are connected through HID technology. We work with governments, educational institutions, hospitals, financial institutions, industrial businesses and some of the most innovative companies on the planet. Headquartered in Austin, Texas, HID Global has over 3,000 employees worldwide and operates international offices that support more than 100 countries. HID Global®is an ASSA ABLOY Group brand. For more information, visitwww.hidglobal.com.

© 2019. HID Global Corporation/ASSA ABLOY AB. All rights reserved. HID, HID Global, the HID Blue Brick logo, the Chain Design and goID are trademarks or registered trademarks of HID Global, ASSA ABLOY AB, or its affiliates(s) in the US and other countries and may not be used without permission. All other trademarks, service marks, and product or service names are trademarks or registered trademarks of their respective owners.

View source version on businesswire.com: https://www.businesswire.com/news/home/20190328005664/en/

SOURCE: HID Global

HID GlobalAnthony PetrucciSenior Director, Corporate Communications & Public Affairs512-776-9225apetrucci@hidglobal.com

Copyright Business Wire 2019



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