[asterisk-users] SIP tunnel

[mosbah.abdelkader]

Hello Scott,

Thank you for your kind support.

All your ideas are helpful.

I will check the OpenVPN solution first. then, I will see if Skype and IAX
may help.

Best Regards.

Abdelkader Mosbah.

♫ *Please discover scientific miracles of CORAN:*
http://www.55a.net/


On Sun, Feb 14, 2010 at 2:57 PM, Scott L. Lykens <
slykens at verimedservices.com> wrote:

> Mosbah –
>
>
>
> I apologize that I only have limited help to offer. I do not work with user
> agents other than hard phones in my regular course of business. In the case
> of aggressive blocking I use Cisco VPN hardware to encrypt the traffic. This
> is probably not a solution for you as it will add $100-$300 per location to
> your set up cost. (Plus your central VPN hardware cost) Best case money-wise
> here would be to use OpenVPN and OpenWRT on Linksys hardware but you’re
> still talking about extra hardware and $100 per location.
>
>
>
> Perhaps you could pay for someone to integrate an OpenVPN client with a
> softphone? Set up the client so that it tries regular SIP and if it fails it
> then establishes a VPN to you using OpenVPN to pass the SIP traffic.
>
>
>
> Another option that comes to mind that may have the potential to do as you
> desire would be an encrypted IAX softphone. As you know, IAX is a simple UDP
> protocol and with “registration” enabled should pass through most firewalls
> properly. You may have to make multiple ports available for use in case
> udp/4569 is outright blocked. Using simple encryption may be sufficient to
> overcome DPI by aggressive ISPs and governments.
>
>
>
> I am sure there are many papers available on how Skype manages to work in
> many unfavorable network situations and would recommend them as a start to
> understanding the whys and hows.
>
>
>
> Best wishes.
>
>
>
> sl
>
>
>
>
>
> *From:* mosbah.abdelkader [mailto:mosbah.abdelkader at gmail.com]
> *Sent:* Sunday, February 14, 2010 7:37 AM
> *To:* Scott L. Lykens
> *Cc:* asterisk-users
> *Subject:* RE: SIP tunnel
>
>
>
> Hello Scott,
>
> First, I want to thank you for your good help.
>
> I need to handle all the failure situations of voip calls. Sometimes, the
> source of failure are the ISP and the government theirselves who inspects
> traffic with powerful firewalls and sometimes the problem comes from the
> client who does not have a sufficient knowledge to allow voip traffic in his
> network.
>
> For all that reasons, I need to implement a generic user agent to have it
> working after its launch in all the situations..
>
> --
> Please discover scientific miracles of CORAN
>
> http://www.55a.net/
>



-- 
Please discover scientific miracles of CORAN

http://www.55a.net/
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