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RE: IPSec for IP Telephony

Granted the overhead is high wrt the small packet sizes, and ESP does
interfere with the desire to compress headers (assuming no
transport-friendly ESP) ------ but I am curious about your comparison of the
threat models.  Why are they very, very different?

Jeff Carr
Broadcom Corporation

> -----Original Message-----
> From: owner-ipsec@lists.tislabs.com
> [mailto:owner-ipsec@lists.tislabs.com]On Behalf Of Steven M. Bellovin
> Sent: Tuesday, March 30, 1999 4:27 AM
> To: Scott Cadzow
> Cc: 'Stephen Kent'; Costantini, Frank ; ipsec@lists.tislabs.com
> Subject: Re: IPSec for IP Telephony
<portion of text removed>
> That said, it isn't clear to me that IPSEC is the right answer in any
> event -- the overhead is high, relative to the very small packet size,
> and its strong protection properties interfere with header compression.
> Besides, the threat model is very, very different.  We are dealing with
> very limited bandwidth on the access lines; our general answer doesn't
> seem to fit Internet telephony very well.