sudo iptables -I INPUT -p tcp -m tcp --dport [open port required] -j ACCEPT sudo iptables -L -n --line-number sudo iptables -D INPUT [the number of the firewall entry that needs to be removed] sudo service iptables save
sudo iptables -I INPUT -p tcp -m tcp --dport [open port required] -j ACCEPT sudo iptables -L -n --line-number sudo iptables -D INPUT [the number of the firewall entry that needs to be removed] sudo service iptables save