Hi, If you are running a route/firewall then you have to do things in FORWARD that is... ## Droping all yahoo related ports voice, messaging, gaming iptables -I FORWARD -o ppp0 -s IpOfClient -p tcp -m multiport --dport 5000,5001,5100,5050,11999 -j DROP # Replace -o ppp0 with your out interface, if you have different then ppp0 for example -o eth0 ##Droping MSN packets iptables -I FORWARD -o ppp0 -s IpOfClient -p tcp --dport 1836 However if you are doing some transparent proxing, for example if you are running squid on the same machine that is the firewall/router machine then replace FORWARD with OUTPUT iptables -I OUTPUT -o ppp0 -s IpOfClient -p tcp -m multiport --dport 5000,5001,5100,5050,11999 -j DROP ##Droping MSN packets iptables -I OUTPUT -o ppp0 -s IpOfClient -p tcp --dport 1836 Regards Askar On Thu, 5 Aug 2004 07:07:38 +0100 (BST), Sameer Gurung <sameersworld@xxxxxxxxxxx> wrote: > IS there a way i can block yahoo chat and instant > messenger and msn from only specific clients from the > network..... the clients get their ip address from a > dhcp server.... > Any help would be appreciated > > ===== > > > ________________________________________________________________________ > Yahoo! India Matrimony: Find your life partner online > Go to: http://yahoo.shaadi.com/india-matrimony > >