Hi, i am trying to use DNS Name and for that i start my Freeswitch Using -nonat and in sip profile create a new profile with the following changes 

<param name="sip-port" value="8080"/>

and 

<param name="ext-rtp-ip" value="host:sip.mydomain-name.com"/>

rest conf is same as internal and when i try to register i got 403 response while on internal profile it works fine
i am using 
FreeSWITCH Version 1.5.8b+git~20131202T224806Z~e127ca7d40~64bit (git e127ca7 2013-12-02 22:48:06Z 64bit)

on centos 64-bit

reply me what else i am missing 

regards

Shahzad Bhatti