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IPTables? How..

Posted: Mon Nov 14, 2011 7:19 pm
by heather22
Hi,
I was looking around to see how to block chat in gmail and found this ..
iptables-I FORWARD-d talkgadget.google.com-p tcp-j REJECT

I downloaded PUTTY, but I do not know step by step which commands to use to add this rule.
I'm still using Gargoyle 1.3.13 because it ran best.

Could someone assist me step by step instructions?