Sounds like NAT issue. Try around with the NAT possibilities of FreeSWITCH.

Von: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] Im Auftrag von Sam
Gesendet: Dienstag, 1. Februar 2011 12:06
An: FreeSWITCH Users Help
Betreff: [Freeswitch-users] port reg request pbm

hello,

The device is sending request to my server ip x.y.z.v from  port 35666

a.b.c.e:35666 -> x.y.z.v :5060
Register

but FS is not sending back to the same port on the device

x.y.z.v:5060 -> a.b.c.e : 5060
401 unauthorized

how this could be solved

Regards
Sam