AT&T uVerse blocking SIP?

Jared Mauch jared at
Tue Jan 27 03:22:56 UTC 2015

Yes.  If you move to another port, e.g.: 5061 it works fine.

If you’re running on a Linux based system, you can do this:

/sbin/iptables -A PREROUTING -t nat -i eth1 -p udp --dport 5061 -j REDIRECT --to-port 5060

on the host to remap 5061 -> 5060 with no application change.

- Jared

> On Jan 26, 2015, at 4:26 PM, Brad Bendy <bb at> wrote:
> Has anyone seen issues where a end user on uVerse trying to connect to
> either another provider or AT&T non uVerse (in this case DIA) is having SIP
> blocked? SIP leaving the uVerse network going to another uVerse DSL account
> is fine, but it appears soon as it leave the uVerse network all SIP traffic
> is blocked?
> It appears others have seen this problem, some say it's a modem issue, some
> say they are truly blocking it. Ive yet to call uVerse support yet as im
> guessing ill get no where.
> Thanks for any insight on this.
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