Ubuntu Firewall

Ubuntu includes ufw (uncomplicated firewall) by default, but it is not enabled.

Configure the Uncomplicated FireWall via CLI

sudo su
ufw allow ssh
#for Fusion
ufw allow 80/tcp
ufw allow 443/tcp
#for FreeSWITCH
ufw allow 1719/udp
ufw allow 1720/tcp
ufw allow 3478/udp
ufw allow 3479/udp
ufw allow 5002/tcp
ufw allow 5003/udp
ufw allow proto tcp from any to any port 5060:5069
ufw allow proto udp from any to any port 5060:5069
ufw allow 5070
ufw allow 5080
ufw allow 5081
ufw allow proto udp from any to any port 16383:32768

ufw default deny
ufw enable
ufw logging on
ufw status
ufw delete 3

Happy Firewalling!

More Information

https://help.ubuntu.com/10.04/serverguide/C/firewall.html

http://pka.engr.ccny.cuny.edu/~jmao/node/28

https://help.ubuntu.com/community/UFW

man ufw