> Dear All > On my CentOS 5 , I installed the Asterisk 1.4.13 and DECT application > software and then when I want to try for "NAT" I issue as the followings : > #iptables -t nat -A POSTROUTING -s 10.20.30.0/24 -o eth0 -j MASQUERADE > But it didn't get through . So I checked if the "NAT" is enabled on > my CentOS server , as the followings : > #echo "1" > /proc/sys/net/ipv4/ip_forward > But still I cannot try for "NAT" . Can you please let me know which other > setings maybe influenced and need to be checked for enabling the "NAT" ? You have your outgoing traffic NATed .. but you need a PREROUTING rule to forward the traffic to your Asterisk server.