Real Audio (tcp) uses port 7070. With our firewall, if the user has real
audio ver 2.0, we had to enable "receive audio via tcp" instead of udp. With
receiving via udp, a random udp port was being assigned, and thus being
blocked by our firewall since it appeared the outside server was attempting
to establish this connection. CU-SeeMe uses port 7648, and uses both tcp and
udp (same port #) during the "conversation". Not sure what IP-PHONE is,
perhaps cool talk? An access list could be constructed disabling these port
numbers from passing.
At 04:03 AM 8/7/96 -0500, you wrote:
>Is there a Cisco filter that can be used to block live
>audio from being received. Do they all use the same port?
>Maybe also C-U-C-ME and IP-PHONE. Much of our bandwidth
>seems to be getting burned by all day audio and other
>un-authorized projects. Thanks.
>
>
>
>
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Darwin L. Martinez, NSE Email: darwin_martinez @
ins .
com
Atlanta Office Site #: 404-843-5954
International Network Services Pager: 800-INS-1-INS
"People of the Earth can you hear me?"
Billy Thorpe, 1979
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