해나아부지 개발일지

Basic iptables options -A - Append this rule to a rule chain. Valid chains for what we're doing are INPUT, FORWARD and OUTPUT, but we mostly deal with INPUT in this tutorial, which affects only incoming traffic. -L - List the current filter rules. -m conntrack - Allow filter rules to match based on connection state. Permits the use of the --ctstate option. --ctstate - Define the list of states f..