Information about the package, psad, which is shipped with common Linux distributions. The psad package is designed for, Port Scan Attack Detector (psad) watches for suspect traffic.
Package Name:
psad
Summary:
Port Scan Attack Detector (psad) watches for suspect traffic
Description:
Port Scan Attack Detector (psad) is a collection of three lightweight system daemons written in Perl and in C that are designed to work with Linux iptables firewalling code to detect port scans and other suspect traffic. It features a set of highly configurable danger thresholds (with sensible defaults provided), verbose alert messages that include the source, destination, scanned port range, begin and end times, tcp flags and corresponding nmap options, reverse DNS info, email and syslog alerting, automatic blocking of offending ip addresses via dynamic configuration of iptables rulesets, and passive operating system fingerprinting. In addition, psad incorporates many of the tcp, udp, and icmp signatures included in the snort intrusion detection system (http://www.snort.org) to detect highly suspect scans for various backdoor programs (e.g. EvilFTP, GirlFriend, SubSeven), DDoS tools (mstream, shaft), and advanced port scans (syn, fin, xmas) which are easily leveraged against a machine via nmap. psad can also alert on snort signatures that are logged via fwsnort (http://www.cipherdyne.org/fwsnort/), which makes use of the iptables string match module to detect application layer signatures.
Architecture:
x86_64
Version:
2.2.3
Release:
1.el6
Size:
488 k
Repository:
epel
From Repository:
Licence:
GPLv2+
Control the psad package with the following handy commands outlined below.
yum install psad
This command will install psad on the server.
yum remove psad
This command will un-install psad on the server. When you run this command, you will be asked if you are sure that you want to remove psad, so you have to manually confirm that you want to do this.
yum -y remove psad
This command will un-install psad on the server. When you run this command with th e -y flag, you will not be prompted to check that you are sure you want to remove the package - so be sure you absolutely want to remove psad when using the -y flag.
yum update psad
This command will update psad to the latest version. When you run this command, you will be asked if you are sure that you want to remove psad, so you have to manually confirm that you want to do this.
yum -y update psad
This command will update psad to the latest version. When you run this command with the -y flag, you will not be prompted to check that you are sure you want to remove the package - so be sure you absolutely want to remove psad when using the -y flag.
yum info psad
This command will show you core information about the psad package.
yum deplist psad
This command will show you the dependencies for psad. Thankfully, when using Yum, if dependencies are required, these are also installed at the same time so you don't have to worry too much about that.
yum check-update psad
This command will check if there is an update waiting on psad. When you run this command this will return nothing if there is nothing to update, or, will return the package name if the package is due to be updated.