I agree. I always leave ALGs off, its just 10x harder when the support asked what SIP was and then told me it's not a common protocol since it's not in his magic book :) On Tue, Jan 27, 2015 at 7:50 AM, Jared Mauch <jared@puck.nether.net> wrote:
I’ve never gotten AT&T to respond to issues, including the fact the device eats the SIP packets, and some types of SIP packets can actually cause their device to reboot as well.
It’s been a few years now since I really chased this down, but beware all of these ‘helpers’, including the Cisco SIP-ALG are broken. It’s more damage introduced by these CPE devices (like broken DNS proxies, etc).
- Jared
On Jan 27, 2015, at 9:47 AM, Brad Bendy <bb@1stclasshosting.com> wrote:
They are saying this CPE has no ALG in it, but they can enable DMZ, which acourse made zero difference.
What I do find funny is they escalated the problem to Tier-2 and wanted to enroll the customer in premium tech support for $15 a month, because the Internet signal is strong and is not causing the problem, sigh.
Back to trying port 5061 it appears!
On Mon, Jan 26, 2015 at 8:44 PM, Christopher Morrow < morrowc.lists@gmail.com> wrote: I think this is due to the CPE using a particular ALG ... (from recollection having never been a UVerse customer, but having sat through a long, long, long set of discussions about the merits/demerits of sip blocking)
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@1stclasshosting.com> 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
On Mon, Jan 26, 2015 at 10:22 PM, Jared Mauch <jared@puck.nether.net> wrote: 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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