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48 lines
1.5 KiB
Text
48 lines
1.5 KiB
Text
psad (Intrusion Detection and Log Analysis with iptables)
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psad is a collection of three lightweight system daemons (two main
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daemons and one helper daemon) that run on Linux machines and analyze
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iptables log messages to detect port scans and other suspicious traffic.
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A typical deployment is to run psad on the iptables firewall where it has
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the fastest access to log data.
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You can set email for alerts by setting ALERTSEMAIL:
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ALERTSEMAIL=alerts@example.com ./psad.SlackBuild
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You need at least these rules:
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iptables -A INPUT -j LOG
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iptables -A FORWARD -j LOG
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but more usefull will be something like this:
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iptables -A INPUT -i lo -j ACCEPT
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iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
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iptables -A INPUT -p tcp --dport 22 -j ACCEPT
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iptables -A INPUT -p tcp --dport 80 -j ACCEPT
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iptables -A INPUT -j LOG
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iptables -A INPUT -j DROP
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please see documentation for more information.
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NOTE:
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psad requires several perl modules:
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perl-Bit-Vector
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perl-Date-Calc
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perl-IPTables-Parse
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perl-IPTables-ChainMgr
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perl-NetAddr-IP
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perl-Unix-Syslog
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these are included in sources, so you don't need to install them.
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But if you get some weird perl modules errors, you must uninstall
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previous psad version before bulding new one.
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Alternatively you can manually install this modules, all are available
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on SlackBuilds.
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NOTE:
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The default option is NOT to download signatures.
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We provide a signature file, but may be outdated as time goes by.
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You can download them manually from http://www.cipherdyne.org/psad/signatures
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and place them in /etc/psad
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