[cisco-voip] UDP 2000 from SRST router to IP phone?

[Lelio Fulgenzi]

We're just setting up some ACLs and found that while in SRST mode, the SRST router (or at least the loopback address that we bind MGCP to) tried to communicate to the IP phone that was registered. We had not allowed for this and as a result, the call out the gateway was one way audio. But we didn't see any other denies come out of the logs.

I see that in the SRST config, it asks for a port, and it is 2000. But it's still wierd to see UDP 2000 being used.

Can anyone comment?

2d08h: %SEC-6-IPACCESSLOGP: list voice_in_kc denied udp 10.104.122.141(17624) -> 10.104.34.48(2000), 1 packet
                                                        ^- IP phone              ^- SRST router


--------------------------------------------------------------------------------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
"Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo."      WJR
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://puck.nether.net/pipermail/cisco-voip/attachments/20070705/05b4c170/attachment.html