Adding bittorrent ports to my iptables

I accessed my router and did the port forwarding necessary to allow my bittorrent client (transmission) to seed properly, but I also needed to add a rule to my iptables to allow the traffic through.

My setup is

Internet     ->     Hardware Router        ->     Linux Desktop
                    with port forwarding          Client
                    enabled

I began by backing up my current iptables file

$ sudo cp /etc/iptables/iptables.rules /etc/iptables/iptables.rules.20130716


I am using Arch Linux Simple Stateful Firewall along with Transmission bittorrent client. The default port is 51413, so I needed to perform the following commands:

$ sudo iptables -A TCP -p tcp --dport 51413 -j ACCEPT
$ sudo iptables -A TCP -p tcp --sport 51413 -j ACCEPT
$ su -c "iptables-save > /etc/iptables/iptables.rules"
Password:
$ sudo systemctl restart iptables.service

If I want to revert back to my old rules (which block port 51413) I can issue the command

$ sudo iptables-restore < /etc/iptables/iptables.rules.20130716
$ su -c "iptables-save > /etc/iptables/iptables.rules"
Password:
$ sudo systemctl restart iptables.service