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... Changes138 _linux_ 02 6 /20 /01 9:34 AM Page 72 44 Chapter 2 • Hardening the Operating SystemAdministrators must also regularly test their systems using security analyzersoftware. Security analyzer software scans ... 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 ... file, an e-mail is automatically sent to the administrator, indicatingthat an unauthorized user is accessing the system.Once a user logs in to sudo, a ticket is issued that is valid by default...

hack proofing linux a Guide to Open Source Security phần 1 docx

... 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. Lane138 _linux_ FM ... such as IBM, Compaq, and Intel.138 _linux_ FM 6 /20 /01 9 :29 AM Page viii14 Chapter 1 • Introduction to Open Source Security PacketstormPacketstorm is speciﬁcally devoted to security, and has an ... Changes 8Partially Developed Solutions 8Should I Use an RPM or Tarballs? 10Tarball 10Red Hat Package Manager 11Debian 11Obtaining Open Source Software 12 SourceForge 12 Freshmeat 13Packetstorm...

hack proofing linux a Guide to Open Source Security phần 5 docx

... Snort’s analysisfeature is able to read the contents of the captured packets and theninform you about any attacks waged against your network.; Snort is able to automatically detect attacks based ... keep appearing in reports unless you update your database.Database update mode allows you to update the database so that it nowww.syngress.com138 _linux_ 04 6 /20 /01 9:38 AM Page 25 5 27 4 Chapter ... 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...

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... following if Apache is installed:apache-manual-1.3. 12- 25apache-1.3. 12- 25apache-devel-1.3. 12- 25www.syngress.com138 _linux_ 08 6 /20 /01 9:46 AM Page 421 440 Chapter 8 • Creating Virtual Private Networksbecause ... FreeS/WAN. If you completed a “Custom” Red Hat Linux installationwith “everything” installed, you can skip this warning—all of the required RedHat Package Manager (RPM) packages are already installed ... time and trouble by acquiringFreeS/WAN through one of these alternate sources.Some available script sets are designed to allow you to manage ﬁrewallsthat also serve as FreeS/WAN IPSec gateways.You...

hack proofing linux a Guide to Open Source Security phần 9 docx

... rules database One of the common moves by a hacker is to alter the rules database in subtle ways that make it easier for thehacker to gain access to the network. Check your rules and comparethem ... problems, because it will require you to ensure that this daemon is not sub-ject to bugs that can cause a security problem. Any daemon, such as Cron, thatacts automatically can cause problems ... can usecron to have Fwlogwatch automatically create HTML reports and place them inyour Apache Server home directory (or any other properly aliased directory).Exercise: Generating an HTML-Based...

hack proofing linux a Guide to Open Source Security phần 3 pot

... 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 ... zombiewww.syngress.com138 _linux_ 03 6 /20 /01 9:35 AM Page 124 1 52 Chapter 3 • System Scanning and Probing■The ability to add an entire IP network or DNS domain to the map,and then have Cheops automatically add new ... System Scanning and Probing • Chapter 3 143Example: Conducting a Paranoid Scan To conduct a paranoid scan against a host, you would issue the following command:nmap -S 20 .20 .20 .20 -e eth...

hack proofing linux a Guide to Open Source Security phần 4 pdf

... 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 ... 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 ... information can stay on the Monitor and Storage device, or it can bebrought to the Analyzer/Control station.The Monitor and Storage device mayhave all log files ready to be served up via a Web...

hack proofing linux a Guide to Open Source Security phần 6 pptx

... 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...

hack proofing linux a Guide to Open Source Security phần 8 doc

... Iptables package.; Ipchains and Iptables also allow you to configure your Linux router to masquerade traffic (i.e., to rewrite IP headers so that a packet appears to originate from a certain host), and/or ... 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 ... Firestarter138 _linux_ 09 6 /20 /01 9:49 AM Page 494Implementing a Firewall with Ipchains and Iptables • Chapter 9 487already set, whereas the other actually sets the values .To create a rule thatmatches a ToS...

hack proofing linux a Guide to Open Source Security phần 10 pps

... rules, 22 7configuring to block users, 22 2 22 3, 22 5important files, 22 1 22 2installing, 22 2, 22 4optimizing to sense attack types, 22 3 22 4, 22 6 22 7running external commands with, 22 7 22 8troubleshooting, ... that allApplication layer data is encrypted. No passwords, usernames, or usable datawww.syngress.comChapter 7 Continued138 _linux_ AppB 6 /20 /01 9:55 AM Page 624 Hack Prooﬁng Linux Fast Track ... encrypted, many tools exist that help hackers wage a snifﬁng attack to capture encrypted information.; After the packets containing the encrypted passwords are captured, hackersuse cracking applications...

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