Subject: RE: [Ieprep] a practical VoIP issue

From: "King, Kimberly S." <[email-masked]>
Date: Sat, 30 Nov 2002 15:57:06 -0500

>Apparently VoIP systems use a wide range of dynamically 
> assigned
> UDP ports, which most firewalls block and which most NATs cannot cope
> with properly.
> 
> 	If one really wants to be able to use Internet 
> infrastructure during
> an emergency, designing a VoIP system that can do 
> NAT/Firewall traversal
> might be a pretty important component.

There exist SIP aware firewalls that can cope with NAT and dynamically
assigned UDP ports.  Are you suggesting something different? 

Kimberly
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