[Openvpn-users] Re: openvpn and voip

[Charles Duffy <cduffy@xxxxxxxxxxx>]

On Tue, 02 Aug 2005 15:18:00 -0400, Eric "Skippy" Hope wrote:

>  The problem comes in when trying to make a call.  The session initiation
> portion of the call goes over the vpn just like it should (this is the sip
> portion, for those familier with voip).  Once the other end picks up the
> phone, the software phone tries to send the actual voice connection over
> the public IPs, ignoring the vpn.  This seems to have something to do with
> the Win TUN/TAP interface.

What IP ranges are you using? If the systems on both sides have internal
(non-public) IPs that they're doing their SIP registration with, such that
they need to use the VPN to access the IPs that the other systems are
registered with... well, I'd expect that you wouldn't have this issue.

If you're using Asterisk, I'd make sure that nat=0 is set in the entries
for the relevant phones in sip.conf, as well.


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