[Openswan Users] voip over ipsec

[tvsjr at sprynet.com]

One of the groups of which I'm a member has developed a VoIP system for amateur radio system linking. No QoS is used, the link is real-time (no buffering, no codec lag, everything that can be done to reduce lag has) and the bandwidth is roughly a full ISDN (128Kbps). The developers actually saw a reduction in jitter and an improvement in overall latency by streaming the traffic over an IPSEC pipe.

Terry 

-----Original Message-----
From: Abdul-Wahid Paterson <abdulwahid at gmail.com>
Sent: May 4, 2005 4:18 PM
To: OpenSwan List <users at lists.openswan.org>
Subject: [Openswan Users] voip over ipsec

Hi,

Has anyone got any thoughts or experience in using VoIP over IPSec? Is
the performance to much of a hit for the VoIP to work properly. What
about packet sizes etc?

Also, under a 2.6 Kernel with no ipsec0 virtual interface, would it be
a good strategy to mark VoIP packets in the PREROUTING chain of the
mangle table to that I can then assign them to the appropriate QoS
queue before the packets are encrypted?

Any thoughts welcomed.

Abdul-Wahid
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