Ubuntu Iptables Kullanımı. The main difference is that the chains input and output are only traversed for packets coming into the local host and originating from the local host respectively. To stop ipv4 based iptables firewall enter.
Sudo apt get install ufw. To insert a rule at line number 4 you could type. If any of the chains has a policy other than accept add a new rule to the right chain with something like for example.
Connect to your server via ssh.
The main difference is that the chains input and output are only traversed for packets coming into the local host and originating from the local host respectively. Chain is a collection of rules. Add an alias to run alias with sudo. If you dont know you can read our ssh tutorial.