Iptables and asterisk (1)

IptablesAndAsterisk:

Iptables fo asterisk

SIP on UDP port 5060. Other SIP servers may need TCP port 5060 as well

Iptables-a input-p udp-m udp-dport 5004: 5082-j ACCEPT

IAX2-the IAX protocol

Iptables-a input-p udp-m udp-dport 4569-j ACCEPT

IAX-most have switched to IAX v2, or ought

Iptables-a input-p udp-m udp-dport 5036-j ACCEPT

RTP-the media stream

Iptables-a input-p udp-m udp-dport restart :20000-j ACCEPT

MGCP-if you use media gateway control protocol in your configuration

Iptables-a input-p udp-m udp-dport 2727-j ACCEPT

Reference: http://www.voip-info.org/wiki-Asterisk+firewall+rules