사진창고

1. Create a new file /etc/yum.repos.d/utterramblings.repo

2. Place the following lines in that file.

[utterramblings]
name=Jason's Utter Ramblings Repo
baseurl=http://www.jasonlitka.com/media/EL$releasever/$basearch/
enabled=1
gpgcheck=1
gpgkey=http://www.jasonlitka.com/media/RPM-GPG-KEY-jlitka

Finally,

yum install mod_security

Important:
That should work. If you get 404 error then replace the correct enterprise linux version (4 or 5)

baseurl=http://www.jasonlitka.com/media/EL$releasever/$basearch/

to

baseurl=http://www.jasonlitka.com/media/EL5/$basearch/

you can block port 110 immediately with

sudo /sbin/iptables -I RH-Firewall-1-INPUT -p tcp -m tcp --dport 110 -j DROP

sudo /sbin/iptables -I RH-Firewall-1-INPUT -p udp -m udp --dport 110 -j DROP

To do it permanently you need to figure out what is actually listening and either disable or remove it. To find what is listening on the port use

netstat -lnp | grep 110

amongst the output you'll get something similar to

tcp    0   0 :::110             :::*                LISTEN      28179/dovecot