call from an unregistered UA through port:5080 cannot get through and reach a regitered UA, e.g. 123456789 calls 1001, 

only by uncomment

<param name="accept-blind-reg" value="true"/>

<param name="accept-blind-auth" value="true"/>

in interal.xml in sip_sofia, can i make the external call connect.

but isn't port 5080 auth free? should i make some modification in external.xml?