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... Changes 8Partially Developed Solutions 8Should I Use an RPM or Tarballs? 10 Tarball 10 Red Hat Package Manager 11 Debian 11 Obtaining Open Source Software 12 SourceForge 12 Freshmeat 13 Packetstorm ... to Open Source Security ™ 1 YEAR UPGRADEBUYER PROTECTION PLAN Linux: A Guide to Open Source Security The Only Way to Stop a Hacker Is to Think Like OneJames StangerPatrick T. Lane 13 8 _linux_ FM ... 11 0Understanding Linux Viruses 11 0Using AntiVir 11 2Key Mode and Non-Key Mode 11 4Licensing AntiVir 11 4Exercise: Updating AntiVir 11 4Using TkAntivir 11 6Required Libraries and Settings 11 7Determining...

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... username and password. Instead,it is recommended that you use an Apache Web-based file archive to allow the public to download files.Bastille VersionsBastille 1. 1.0 and later incorporates several ... steps to install and configure Bastille: 1. Log in as root.2. Copy the Bastille tarball to your root directory.You can access the tarballfrom the CD accompanying this book (Bastille -1. 1 .1. tar.gz), ... Bastille is written specifically to Red Hat Linux and Mandrake Linux. The specific Red Hat/Mandrake content has beengeneralized, and hard-code filenames are now represented as variables.These variables...

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... data? A: As you have learned, packet sniffing is a powerful tool. It allows malicioushackers to capture packets that contain passwords and usernames.The onlyway to protect yourself against hackers ... directories, and databases.; An IDS can act as a supplement to a firewall, because it can help youmonitor traffic on the internal network. Sometimes it may be useful to place an IDS application ... case, the ICMP echo requestpackets are originating from a host at 24 .13 0 .10 .19 2.Boolean Operators You can also use Boolean operators to further specify a filter. Boolean operatorsare the AND,...

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... –qa | grep apache6. Host2:You should receive a response similar to the following if Apache is installed:apache-manual -1. 3 .12 -25apache -1. 3 .12 -25apache-devel -1. 3 .12 -25www.syngress.com 13 8 _linux_ 08 ... RedHat Package Manager (RPM) packages are already installed (you may need to update them later in this section). To check if an RPM is installed, enter rpm -qa | grep rpm_name .To install an RPM, ... 8.9 Starting Out with a PPP FramePPPHeaderPPP Payload(IP Packet)Figure 8 .10 Adding an L2TP and UDP Header to a PPP FramePPPHeaderPPP Payload(IP Packet)L2TPHeaderUDPHeader 13 8 _linux_ 08...

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... Frequently Asked QuestionsChapter 11 543 13 8 _linux_ 11 6/20/ 01 9: 51 AM Page 543Maintaining Firewalls • Chapter 11 549employee morale. Make sure that upper management understands theramifications of any ... bepreludes to an attack.Following is a more detailed discussion concerning each of these issues.Maintaining Firewalls • Chapter 11 545 13 8 _linux_ 11 6/20/ 01 9: 51 AM Page 545550 Chapter 11 • Maintaining ... file:tail –f /var/log/messageswww.syngress.com 13 8 _linux_ 11 6/20/ 01 9: 51 AM Page 557Maintaining Firewalls • Chapter 11 579Notification Options To configure Fwlogwatch to notify you about attacks,...

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... may wish to use Nmap in a network that uses a well-configured firewall oran IDS). If so, you may want to conduct scans that cannot be easily detected, orare actually able to traverse a firewall ... 9:36 AM Page 15 6System Scanning and Probing • Chapter 3 14 1application, such as Cheops or an IDS to generate a network map. Seelater in this chapter and Chapter 4 for more information.■-iL Allows ... running■The ability to manually add or delete a host from the mapwww.syngress.comFigure 3 .17 A Completed Rnmap Scan 13 8 _linux_ 03 6/20/ 01 9:36 AM Page 15 1 13 2 Chapter 3 • System Scanning and Probing2....

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... Snort to Log to a Database■Identifying Snort Add-Ons; Summary; Solutions Fast Track; Frequently Asked QuestionsChapter 4 19 1 13 8 _linux_ 04 6/20/ 01 9:38 AM Page 19 1 18 6 Chapter 3 • System Scanning ... generally extends your logging capability by placing additional information into a log ﬁle or into a database. Alerting An IDS often has the ability to send alert messages to the network administrator ... creates its database, it is said to enter databaseinitialization mode.5. You can then set Tripwire to rescan these ﬁles and compare their signa-tures to the signatures stored in the database.This...

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... and /var/kerberos/krb5kdc/kdc.acl files to reflect your Kerberosrealm and DNS domain names.You must then add an administrative user, as wellas additional principals, to the database.Using kadmin.localBecause ... a Kerberos administrator uses the kadmin pro-gram to add a principal to the database. Note that the ticket does not actuallycontain the password. It is only signed by a password, which creates ... their packet sniffing on one server orclient interface, or try to hack into a server that contains the sensitiveinformation they seek. For example, they may attempt to hack into a bank’s database...

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... Implementing a Firewall with Ipchains and IptablesUsing and Obtaining AutomatedFirewall Scripts and Graphical Firewall UtilitiesSeveral attempts have been made to automate the process of creating a ... owndynamic database. If this database senses a number of ports that havebeen scanned in a row, the firewall can take action. Some actions thefirewall can take may include automatic firewall reconfiguration ... reconfiguration andautomatic alerts.Exercise: Using Firestarter to Create a Personal Firewall 1. Make the necessary preparations for your firewall. If you are creating a personal firewall, then you can...

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... 462Nessus, 16 5 16 6client/server relationship, 16 7 16 9continuous scans, 18 1creating new users, 17 4detached scans, 18 0, 18 1, 18 2 18 4differential scans, 18 0 18 1, 18 2 18 4disabling gtk support, 17 1firewalls ... 11 makefiles, tarball, 10 , 11 Makinen,Tuomo, 14 7malware, open source software as, 8–9man-in-the middle attacks, 3 01 302, 303management, communicating firewall infor-mation to, 548–549managerreport.txt ... 17 2rules database and, 17 4 17 5running a scan with, 17 6 17 9tarball-based installation, 17 0 17 1updating, 17 9 18 0Windows-based, 16 9NetBIOS Session Service, 50NetBSD, 442Netcat, 552–558acquiring,...

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