Albertux~# ./Blog

Firewalls

smothwall
ipcop
untangle
endian
m0n0wall
vyatta
pfsense

Other option: install any linux flavor + squid + iptables

Good option for windows users: http://personalfirewall.comodo.com/

Block Messenger (squid + iptables)

In Mexico i was installed a firewall and squid on a server the important options are:

squid.conf:

acl no_permitido dstdomain "/etc/squid/blocked.domains"
acl msn_mime req_mime_type -i ^application/x-msn-messenger$
acl msn_gw url_regex -i gateway.dll
http_access deny all msn_mime
http_access deny all msn_gw

blocked.domains:

.ebuddy.com
.messengerfx.com
.iloveim.com
.meebo.com
...

iptables:

iptables -I FORWARD -p tcp --dport 1863 -j REJECT