I'am working on learning how iptables work. I've found some rules at http://www.yolinux.com/TUTORIALS/LinuxTutorialIptablesNetworkGateway.html I understand the most of it but there is one rule I don't quite understand and I can't find any explanation. Can any of you please explain me what this rule does? IPTABLES -A INPUT -p tcp --tcp-option ! 2 -j REJECT --reject-with tcp-reset Bjarke R.
