UD instead of UDP

I’ve notice a problem registering to my sip provider after upgrading * from 1.2.09 to 1.2.11
My provider is skypho and is registering server is voip.eutelia.it (ip:

I’ve used this reg string: register=number:secret@voip.eutelia.it/ext

but registering allways goes to time out.

With sip debug on ip i’ve discovered this:

REGISTER 12 headers, 0 lines
REGISTER attempt 1 to number@voip.eutelia.it
Reliably Transmitting (NAT) to
 with fd -1
REGISTER sip:voip.eutelia.it SIP/2.0
Via: SIP/2.0/UD myip:5060;branch=z9hG4bK65d9ff21;rport
From: <sip:number@voip.eutelia.it>;tag=as64df631d
To: <sip:number@voip.eutelia.it>
Call-ID: 7332c52d024b40144e1bd7fc072e47da@
User-Agent: asterisk
Max-Forwards: 70
Expires: 300
Contact: <sip:number@myip;transport=UD>
Event: registration
Content-Length: 0

Immediatly i’ve notice that the transport was UD instead of UDP

Changing the reg string to:
so with the ip instead of the domain name the register goes to goal but still not be able to recevie calls

Now it’s work but i don’t know how i made it :smile:

I’m asking you: “perhaps there is a bug with sip stack?” i’ve searched on this forum but i’ve find nothing about that