From: Joe Pinkus (jpinkus@xxxxxxxxx)
Date: Wed Jun 14 2000 - 15:28:21 GMT-3
Hank,
I don't know where you are getting your information. Look at the ITU specs for
H.323.
H.225 will use TCP port 1720 as well as a port in the range of 11xxx
H.245 uses TCP ports 11xxx
RTP is a random choice of ports in the range of 16xxx to 32xxx, the port number
choosen is not dependent on the number of conversations, it is a complete rando
m
choice negotiated between the two endpoints.
Also, I have never had a class taught by you, so please don't imply this in you
r
email.
Thanks,
Joe
Hank Leung wrote:
> 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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