[asterisk-users] Could two Asterisk servers connect through VPN

[Tielin Xu]

Many thanks to you all. I think that I can do this for IAX based VPN set
up between two Asterisk servers
in remote offices.

>>> gordon+asterisk at drogon.net 05/07/07 11:51 AM >>>
On Mon, 7 May 2007, Tielin Xu wrote:

> Hi list:
>
> Has anyone done to set up two servers in different remote offices
> through VPN
> in order to get the VoIP communication?

Yes it will work, but depending on your hardware you might be better
off 
not using the VPN and just using an IAX trunk over the public Internet

(unless you're really paranoid about someone listening in)

If you have a VPN with good hardware - eg. something with a hardware 
encryption engine, you'll be just fine. Beware the cheaper routers with

software VPNs built in - they are rate limited due to the weedy
processors 
in them and you may find that the processor may take longer or shorter

time to encrypt different packets which will affect jitter. I found
this 
with Drayteks anyway. Even though there was plenty of bandwidth, under

load things didn't look right (this was actually between 2 polycom
video 
units 9000 miles apart - California/England) turn the encryption off
and 
it was perfect, or move to a router whith hardware encryption and it
was 
also perfect.

You get what you pay for...

Good luck!

Gordon
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