asterisk users - May 2007 - Could two Asterisk servers connect through VPN

Hi list:

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

Thanks for your information.

Tielin Xu

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? 
>   
OpenVPN will work fine, you do want to have plenty of bandwidth and 
processing to make it work though.

-- 
Chris Mason
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Hi,
Yes they can - relatively straight forward.

Regards,


Sahil Gupta
VoiceValley

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?
>
> Thanks for your information.
>
> Tielin Xu
> _______________________________________________
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Am 07.05.2007 um 19:03 schrieb Tielin Xu:
> Has anyone done to set up two servers in different remote offices
> through VPN
> in order to get the VoIP communication?
Yes.
> Thanks for your information.
You're welcome.

*SCNR*

Have a look at http://en.wikipedia.org/wiki/VPN and http:// 
en.wikipedia.org/wiki/OpenVPN
In case you are familiar with Linux you should be up and running in  
one day. It is not magic.

   Stefan

--
amooma GmbH - Bachstr. 126 - 56566 Neuwied - http://www.amooma.de
     Let's use IT to solve problems and not to create new ones.
           Asterisk? -> http://www.das-asterisk-buch.de

Gesch?ftsf?hrer: Stefan Wintermeyer
Handelsregister: Neuwied B 14998

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

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@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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Thanks Tim, good option.

The good thing with VPN is that two Asterisk servers would have no
exposure on public internet.

Tielin
>>> tim@mexuar.com 05/08/07 1:45 AM >>>
On 7 May 2007, at 19:51, Gordon Henderson wrote:
> 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)
>
Even if you are paranoid, you can still just use IAX, set  
'encryption=yes' at both ends
and IAX will encrypt the calls for you. There is a bandwidth  
overhead, but it is
probably less that that of a VPN.

Note, the calling/called numbers are still passed in the clear over  
encrypted IAX,
so you are still vulnerable to traffic analysis.



Tim Panton

www.mexuar.net 
www.westhawk.co.uk/ 



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