From: Hank Leung (hank1979@xxxxxxxxxxx)
Date: Wed Jun 14 2000 - 14:22:22 GMT-3
Hey Joe,
H.323 uses RAS H.225 for packetization and synchronization, it also uses
H.245 to control communications between DTEs. But the TCP port H.323 uses
is TCP 1720. I have a link:
http://www.cs.columbia.edu/~hgs/rtp/h323.html
You're right about the RTP UDP ports, though. The ENTIRE voice port range
is(16384-32767). RTP begins on an even number and RTCP follows on the next
odd number, and so on. I remembered the access-list I gave you from a class
I taught recently. I guess my range of 16380-16480 works because of our low
number of conversations.
Best!
Hank
>I am not sure how this access list would work. H.225 and H.245 will use
>TCP
>ports 11xxx during the call signaling and setup. RTP will use UDP ports
>16384 to 32767.
>
>Joe
>
>Hank Leung wrote:
>
> > Yup. I use these in my configs. Should catch everything.
> >
> > access-list 101 permit udp any any range 16380 16480
> > access-list 101 permit tcp any any eq 1720
> >
> > Hank
> > CCNP-Voice
> >
> > >From: Jeff Sapiro <jsapiro@wnmail.wndev.att.com>
> > >Reply-To: Jeff Sapiro <jsapiro@wnmail.wndev.att.com>
> > >To: GroupStudy CCIE <ccielab@groupstudy.com>
> > >Subject: Lazy VoIP question
> > >Date: Mon, 12 Jun 2000 13:01:48 -0400
> > >
> > >Does VoIP require tcp/udp ports? I can't find info on this. Which
>ports
> > >(for firewall considerations)?
> > >-Jeff
> > >
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