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I'm setting up a Firewall with Iptables, the firewall
1. - must block msn service but
2.- allow the hotmail service, also
3 . - must be able to allow some user's to use msn,
The first thing I've done with the next rules
$iptables -t mangle -A PREROUTING -p tcp --dport 1863 -j DROP
while read messenger; do
iptables -t mangle -A PREROUTING -d $messenger -j DROP
done $less$ /etc/list-of-msn-servers
this works, but also block's the hotmail service, any suggestions about what can i do?
the third thing I was thinking solve with mac address, the firewall is also a DHCP server, so in my LAN I don't have fix ip address I found something that allows to some users use the msn service but there is based on ip's, can someone help me to translate those rules to work with mac address?
You should look at layer7 filter (http://l7-filter.sourceforge.net/) or setup a proxy server such as squid. This will allow you to block msn traffic and other application level filtering on a per IP bases.
You can configure it on a bridge device so it will be transparent to your network as well.