Hello list,

I'm experimenting a "strange" issue with FreeSWITCH.

If I Start Freeswitch from command line:

freeswitch -nonat -nf

IPv4 internal profile working fine:

 sofia status

                     Name          Type                                       Data      State
=================================================================================================
            external-ipv6       profile   sip:mod_sofia@[2001:19f0:9002:11f6:5400:1ff:fe64:1503]:5080   RUNNING (0)
             45.77.161.19         alias                                   internal      ALIASED
                 external       profile            sip:mod_sofia@45.77.161.19:5080      RUNNING (0)
    external::example.com       gateway                    sip:joeuser@example.com      NOREG
            internal-ipv6       profile   sip:mod_sofia@[2001:19f0:9002:11f6:5400:1ff:fe64:1503]:5060   RUNNING (0)
                 internal       profile            sip:mod_sofia@45.77.161.19:5060      RUNNING (0)
=================================================================================================

If I use script daemon

systemctl start freeswitch

with this parameters:

-nonat -nf -nc

I have this error:

Error Creating SIP UA for profile: internal (sip:mod_sofia@45.77.161.19:5060;transport=udp,tcp)
The likely causes for this are:
1) Another application is already listening on the specified address.
2) The IP the profile is attempting to bind to is not local to this system

 sofia status
                     Name          Type                                       Data      State
=================================================================================================
            external-ipv6       profile   sip:mod_sofia@[2001:19f0:9002:11f6:5400:1ff:fe64:1503]:5080   RUNNING (0)
                 external       profile            sip:mod_sofia@45.77.161.19:5080      RUNNING (0)
    external::example.com       gateway                    sip:joeuser@example.com      NOREG
            internal-ipv6       profile   sip:mod_sofia@[2001:19f0:9002:11f6:5400:1ff:fe64:1503]:5060   RUNNING (0)
=================================================================================================

I compiled 1.6 version from source (git) on CentOS 7.4. Remote VPS with Public and Private IPv4

Any Hint?

Thank you

Regards

-- 
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I'm SoCIaL, MayBe