Re: Firewall question

David R McGee (
Tue, 16 May 1995 17:07:42 -0700

4: 15pm)@
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Would someone please repond to this question!

It is obvious from reading the FAQs that UDP port 7648 is used for peer-to-peer
CU-SeeMe communication.

What is not obvious is how and exactly over what ports do the reflectors
communicate. One message I ran across indicated that 7649-51 are used for
reflector traffic. After some initial testing at PNL, I thought that the
relfectors used TCP, instead of UDP. This would be essential for a secure
firewall breach.


David R. McGee                                     Computer Scientist
Environmental Molecular Sciences Laboratory
Pacific Northwest Laboratory                       (509)375-6437
Battelle Boulevard, M/S K1-87, Richland, WA 99352  (509)375-6631 [fax]