have Asterisk installed and all SIP extentions are working inside the NAT, however, when I try connecting from external SIP phones, i hear no dial tone. sip.conf is as follows externip = dedra.dyndns.org localnet=192.168.0.0/255.255.255.0 nat=yes am I doing anything wrong? Please assist. I am using Grandstream sip phones. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20071016/cf870a1d/attachment.htm