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diff --git a/core/samhain.html b/core/samhain.html new file mode 100644 index 0000000..74f88fd --- /dev/null +++ b/core/samhain.html @@ -0,0 +1,265 @@ +<!DOCTYPE html> +<html dir="ltr" lang="en"> + <head> + <meta charset='utf-8'> + <title>2.2.4. Samhain</title> + </head> + <body> + + <a href="index.html">Core OS Index</a> + + <h1 id="samhain">2.2.4. Samhain</h1> + + <p>Read + <a href="http://www.la-samhna.de/samhain/manual/">Samhain Manual</a>, + samhain is a file and host integrity and intrusion alert system + suitable for single hosts as well as for large, UNIX-based networks. + samhain offers advanced features to support and facilitate + centralized monitoring.</p> + + <p>The client (or standalone) part is called samhain, while the + server is referred to as yule. Both can run as daemon processes.</p> + + <p>Most of the options require being defined at compile time, is + easy to start with basic and then compile as more features are + required.</p> + + <pre> + $ sudo prt-get depinst samhain + </pre> + + <dl> + <dt>/var/lib/samhain/samhain_file</dt> + <dd>signature database</dd> + <dt>/etc/samhainrc</dt> + <dd>configuration file</dd> + <dt>/var/log/samhain.log</dt> + <dd>log file</dd> + </dl> + + <h2 id="conf">2.2.4.1. Configure</h2> + + <p>For more information on configuration check + <a href="http://www.la-samhna.de/samhain/manual/filedef.htm">Monitoring Policies</a>. + Description of section headings;</p> + + <dl> + <dt>ReadOnly</dt> + + <dd>All modifications except access times will be + reported for these files.</dd> + <dd>Checked: owner, group, permissions, file type, device number, + hardlinks, links, inode, checksum, size, mtime, ctime.</dd> + + <dt>LogFiles</dt> + + <dd>Modifications of timestamps, file size, and signature will be + ignored.</dd> + <dd>Checked: owner, group, permissions, file type, device number, + hardlinks, links, inode.<dd> + + <dt>GrowingLogFiles</dt> + + <dd>Modifications of timestamps, and signature will be ignored. + Modification of the file size will only be ignored if the file size + has increased.</dd> + <dd>Checked: owner, group, permissions, file type, device number, + hardlinks, links, inode, size >= previous_size, checksum(file start + up to previous size) equals previous checksum.</dd> + + <dt>Attributes</dt> + + <dd>Only modifications of ownership, access permissions, and device + number will be checked.</dd> + <dd>Checked: owner, group, permissions, file type, device number.</dd> + + <dt>IgnoreAll</dt> + + <dd>No modifications will be reported. However, the existence of the + specified file or directory will still be checked.</dd> + + <dt>IgnoreNone</dt> + + <dd>All modifications, including access time, but excluding ctime, will + be reported - checking atime and ctime would require to play with + the system clock.</dd> + <dd>Checked: owner, group, permissions, file type, device number, + hardlinks, links, inode, checksum, size, mtime, atime.</dd> + + </dl> + + <pre> + $ vim /etc/samhainrc + </pre> + + <p>This is just a resume, there is a complete template + on crux ports?.</p> + + <pre> + [Misc] + + [ReadOnly] + dir = 0/ + + [Attributes] + file = /tmp + file = /dev + file = /media + file = /proc + file = /sys + + [ReadOnly] + dir = 99/etc + + [Attributes] + file = /etc/mtab + file = /etc/adjtime + file = /etc/motd + file = /etc/fstab + + file = /etc + + [ReadOnly] + dir = 99/boot + + [ReadOnly] + dir = 99/bin + dir = 99/sbin + + [ReadOnly] + dir = 99/lib + + [Attributes] + dir = 99/dev + + [IgnoreAll] + dir = -1/dev/pts + + [ReadOnly] + dir = 99/usr + + [IgnoreAll] + dir = -1/usr/ports/core + dir = -1/usr/ports/opt + dir = -1/usr/ports/contrib + dir = -1/usr/ports/work + dir = -1/usr/ports/distfiles + + [ReadOnly] + dir = 99/var + + [IgnoreAll] + dir = -1/var/cache + dir = -1/var/lock + dir = -1/var/mail + dir = -1/var/run + dir = -1/var/spool + dir = -1/var/tmp + + [Attributes] + + file = /var/lib/mlocate + file = /var/lib/mlocate/mlocate.db + file = /var/lib/urandom + file = /var/lib/urandom/seed + + [GrowingLogFiles] + dir = 99/var/log + + file = /var/log/samhain.log.lock + + [Attributes] + file = /var/log/old/*.[0-9].gz + + [Misc] + IgnoreAdded = /var/log/.*\.[0-9]+$ + IgnoreAdded = /var/log/.*\.[0-9]+\.gz$ + IgnoreAdded = /var/log/.*\.[0-9]+\.log$ + IgnoreAdded = /var/log/[[:alnum:]]+/.*\.[0-9]+$ + IgnoreAdded = /var/log/[[:alnum:]]+/.*\.[0-9]+\.gz$ + IgnoreAdded = /var/log/[[:alnum:]]+/.*\.[0-9]+\.log$ + IgnoreAdded = /var/lib/slocate/slocate.db.tmp + IgnoreMissing = /var/lib/slocate/slocate.db.tmp + + [IgnoreNone] + + [Prelink] + + [User0] + + [User1] + + [EventSeverity] + + [Log] + MailSeverity=notice + PrintSeverity=none + + [Misc] + Daemon = yes + ChecksumTest=check + SetNiceLevel = 19 + SetIOLimit = 500 + SetLoopTime = 600 + SetFileCheckTime = 7200 + ReportOnlyOnce = True + SetMailTime = 86400 + SetMailNum = 10 + SetMailAddress=root@localhost + SyslogFacility=LOG_LOCAL2 + + </pre> + + <p>Initialize database;</p> + + <pre> + # samhain -t init -p notice + </pre> + + <p>If you want to "restart" remove samhain_file and run again + the command above. If daemon is set on config file you just + need to run;</p> + + <pre> + # samhain -t check -p notice + </pre> + + <p>To control daemon;</p> + + <pre> + # samhain stop + # samhain start + # samhain restart + # samhain reload or force-reload + # samhain status + </pre> + + <h2 id="updatedb">2.2.4.2. Update database</h2> + + <p><a href="http://www.la-samhna.de/samhain/manual/updating-the-file-signature-database.html">Manual</a>, + You can update the database while the daemon is running, as long + as you don't interfere with its logging. Using flag -l like this + samhain -t update -l none make sure the log file is not accessed.</p> + + <pre> + # samhain -t update -l none --interactive + </pre> + + <p>Interactive update are supported with the command line flag + --interactive. A file with a list of good files, absolute path, + one per line, can be passed with flag --listfile. Example;</p> + + <pre> + # samhain -t update -l none --listfile=/root/list_of_files + </pre> + + <a href="index.html">Core OS Index</a> + <p> + This is part of the c9-doc Manual. + Copyright (C) 2017 + c9 team. + See the file <a href="../fdl-1.3-standalone.html">Gnu Free Documentation License</a> + for copying conditions.</p> + + </body> +</html> |