Hi All, I want to put a ASTERISK BOX bend a Firewall. So I have given below rules. iptables -A FORWARD -p udp -d 192.168.101.30 -m multiport --dports 3478,4569,5060 -m state --state NEW -j ACCEPT iptables -A FORWARD -p udp -d 192.168.101.30 --dport 10000:20000 -m state --state NEW -j ACCEPT iptables -t nat -A PREROUTING -p udp -i eth0 -d 1.2.3.4 -m multiport --dports 3478,4569,5060 -j DNAT --to-destination 192.168.101.30 iptables -t nat -A PREROUTING -p udp -i eth0 -d 1.2.3.4 --dport 10000:20000 -j DNAT --to-destination 192.168.101.30 pls assume 1.2.3.4 is the ip that connects to the internet. I use Xlite sotphone to talk. I can register. it says user ready. I can dial extentions as well. But , WHEN I talk , Both parties can not hear anyrhing. in rtp.conf file, PORT 10000 to 20000 are also available. Hope to hear from you. -- Thank you Indunil Jayasooriya -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20070912/975951f3/attachment-0004.html>