iptables -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT iptables -A OUTPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT iptables -A INPUT -p tcp -m conntrack --ctstate NEW -m ...

Mastering iptables could take a while, but if you have a few rules to cover the basic security needs, you'll be well on your way to protecting your Linux system. Jack Wallen explains some key rules to ...

The -m socket line you find everywhere Many TPROXY iptables examples on the internet contain an unexplained refinement that uses -m socket -p tcp. The socket module of iptables matches patches that ...