H.320 gateways a MEGACO / ITU

Melinda Shore shore at ITHACA-VIENNASYS.COM
Wed Mar 31 16:45:05 EST 1999

There's a problem in that it makes the signaling channel sufficiently
complicated to parse that you end up having to put a proxy, or something
that looks an awful lot like a proxy, on the firewall in order to
pick up dynamically-allocated address/port tuples.  This has somewhat
negative architectural implications in that in a multi-firewall
environment (which is, alas, the norm when traversing multiple
administrative domains) you end up with tandemed signaling loops.

The short answer is that IP is supposed to be end-to-end
and that firewalls create a big disconnect between the IP network
and the IP telephony application-layer network.


At 01:26 PM 3/31/99 -0800, Matt Holdrege wrote:
>So why specifically does PER have a problem with firewalling/packet filtering?

Melinda Shore
Member of the Scientific Staff
Nokia IP Telephony
127 West State Street
Ithaca, New York  14850
+1 607 273 0724 x81 (office)
+1 607 275 3610 (fax)
+1 607 280 0010 (mobile)
shore at ithaca-viennasys.com

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