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Re: AW: IPSec for IP Telephony

To: Bungert Michael <Michael.Bungert@mchp.siemens.de>
Subject: Re: AW: IPSec for IP Telephony
From: "Steven M. Bellovin" <smb@research.att.com>
Date: Tue, 06 Apr 1999 09:30:59 -0400
Cc: ipsec@lists.tislabs.com
Sender: owner-ipsec@lists.tislabs.com


> > 
> If you also want to protect signalling (e.g. in H.323) there are several port
> s involved. Nevertheless, I also doubt the appropriateness of IPSec for the p
> rotection of VoIP. I believe that for VoIP end-to-end security (esp. confiden
> tiality) is crucial (even for communication in a local network). But, if I wa
> nt to realize end-to-end security I have to deal with firewall traversals. Ho
> w shall I do that using IPSec in a VoIP scenario ?
> 

Firewalls are indeed another concern for IPsec, if your VoIP products are
intended to run in that sort of environment.  And signaling is a different
matter entirely; its characteristics are very different.

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