Ossec
Contents |
Overview
OSSEC is a host based intrusion detection system, it performs numerous local security controls including log analysis, active-response to attacks (shunning), rootkit detection, file integrity checks, and local security policy assessments. Just to name a few. You can read more about OSSEC here: http://www.ossec.net
Announcements
OSSEC 2.0 Final Official 2.0 release has been published to the ASL-2.0 channel
OSSEC 2.0.0-0.090205 test build this update addresses mysql issues mentioned in the troubleshooting section
Troubleshooting
Error: Missing Dependency: libpq.so.3 is needed by package ossec-hids-server
This occurs on CentOS4 systems using the CentOSPlus repository, and updating to OSSEC 2.0. It can be resolved with:
yum install postgresql-devel
Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
This is a known problem in versions of OSSEC 1.6.1 and lower. Currently to fix this an upgrade to a newer version is required:
Step 1) Upgrade to a CVS snapshot (1.99 or higher)
yum upgrade ossec-hids
Step 2) Update ASL policy
asl -s -f
Step 3) Drop the existing tortix database
mysql -u admin -p`cat /etc/psa/.psa.shadow` drop database tortix;
Step 4) Create a new database, and select it
create database tortix; use tortix; quit
Step 5) Create the new OSSEC database
mysql -u admin -p`cat /etc/psa/.psa.shadow` tortix < /var/ossec/etc/mysql/mysql.schema
Step 6) restart ossec
/etc/init.d/ossec-hids restart
Check for file system changes on all agents
This is a quick little script to poll all agents for recent file system changes
for i in `/var/ossec/bin/syscheck_control -l -s | cut -d "," -f 1`; do echo "For agent $i" ; /var/ossec/bin/syscheck_control -s -i $i | grep "`date +\"%Y %b %d\"`"; done