Solved it! :) Or rather, a friend of mine assisted me and we found the trouble. In the code I added at the end of INPUT, FORWARD and the redirected DMZ chain the following: iptables -A INPUT -p tcp -j REJECT --reject-with tcp-reset iptables -A FORWARD -p tcp -j REJECT --reject-with tcp-reset iptables -A DMZ -p tcp -j REJECT --reject-with tcp-reset I removed the --reject-with tcp-reset on each line and the problem dissapeard. The strange thing is that this communication should never reach this rule. When the communcation is established it should hit the rule: -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT Should it not? (this rule runs before the -j DMZ and I have another one for INPUT). I have no explanation for this behaviour. Will try to log and see what I can find but for now this is all I know. Thanks for the replies so far. Best regards Stian B. Barmen
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