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

[Paul Choi]

I could be full of shit but I'm pretty sure that SCCP
uses UDP 2000 to communicate with CCM.


--- Lelio Fulgenzi <lelio at uoguelph.ca> wrote:

> 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)
>
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> 
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> 



       
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