[177581] in North American Network Operators' Group
Re: AT&T uVerse blocking SIP?
daemon@ATHENA.MIT.EDU (Dan Lowe)
Tue Jan 27 21:46:21 2015
X-Original-To: nanog@nanog.org
From: Dan Lowe <dan@tangledhelix.com>
To: nanog@nanog.org
In-Reply-To: <3291F28A-7010-46B5-955E-F2AFFDCD688F@puck.nether.net>
Date: Tue, 27 Jan 2015 21:29:34 -0500
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Mon, Jan 26, 2015, at 10:22 PM, Jared Mauch wrote:
> Yes. If you move to another port, e.g.: 5061 it works fine.
>=20
> If you=E2=80=99re running on a Linux based system, you can do this:
>=20
> /sbin/iptables -A PREROUTING -t nat -i eth1 -p udp --dport 5061 -j
> REDIRECT --to-port 5060
>=20
> on the host to remap 5061 -> 5060 with no application change.
>=20
> - Jared
In most cases the above has worked fine (we also use a 15060 -> 5060
remap), but I have one user for whom nothing seems to work. The problem
has persisted with different models of CPE, different phones, different
server-side ports (5060, 5061, 15060). They even moved and the problem
followed them to a new house (albeit in the same area). I was never able
to work out the issue and have been assuming it's a regional problem in
Uverse (in this case it was near Austin, TX).
IIRC, the user ended up switching to cable.
Dan
