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Re: [Openvpn-users] OpenVPN and QEMU



Title: Re: [Openvpn-users] OpenVPN and QEMU
Yes, you are right.
I was wrong, sorry.
 
The host behind NAT (the server running in qemu)
should see the clients actuall address.
 
Try this, to test the connection:
 - inside QEMU run this : nc -v -l -u -p 1194
 - on the client PC :  nc -v -u 192.168.1.100 1194
then type something in the clints nc window and press ENTER. Does it appear on the QEMU?
Type something in the QEMU nc window. Does it appear on the other PC ?
 
Regards,
David
 


From: Carlos Baiget [mailto:carlos.baiget@xxxxx]
Sent: sre 16-jan-08 12:57
To: openvpn-users@xxxxxxxxxxxxxxxxxxxxx
Cc: David Balazic
Subject: Re: [Openvpn-users] OpenVPN and QEMU

More info on the NAT issue:

if i try another setup:

Client (internet) -------- Home Router (internet-lan) ----- Server (nat)

I can make a connection to the server (not running in qemu but on a real
machine), but it recognizes the public ip of the client, not the internal ip
of the router, as it happens in the qemu experiment.
I mean that if the qemu server says that the connection is to 10.0.2.2 because
it is its nat router, in this case i should see a 192.168.1.1 because it is
the nat router of the server here, but what I get is:

>Wed Jan 16 12:44:48 2008 Peer Connection Initiated with 158.42.xxx.yyy:1194

On the other hand, client says that connection is to the public ip of the
router, but this is ok as far as I know.

Thanks
Carlos


El Wednesday 16 January 2008 12:39:24 Carlos Baiget escribió:
> El Wednesday 16 January 2008 10:01:40 David Balazic escribió:
> > This is perfectly normal and OK. This is how NAT works. QEMU will
> > redirect the packet to the correct client.
>
> Ok, then I'm completely lost.
>
> > Besides, what exacly is the problem ?
> >
> > Client not getting packets ?
> >
> > Or server seeing replay packets ?
> >
> > PS: What does "'ifconfig' is used inconsistently" mean , does anybody
> > know ?
>
> I'm not sure if client receives packets or not. I think that it does, as
> the server complains about receiving replay packets. Definitely the client
> doesn't show any error messages. I'll look with a packet sniffer to be
> sure. Server shows a lot of warnings about replay packets, and the
> connection doesn't work. If I silence that with 'no-replay', I get the
> 'ifconfig'
>
> message:
> > > Tue Jan 15 23:50:54 2008 WARNING: 'ifconfig' is used inconsistently,
> > > local='ifconfig 10.8.0.1 10.8.0.2', remote='ifconfig 10.8.0.2 10.8.0.1'
>
> as if I was using an inconsistent ifconfig statemente in both configuration
> files, but i have checked that they are ok:
>
> server: ifconfig 10.8.0.1     10.8.0.2
> client : ifconfig 10.8.0.2    10.8.0.1
>
>
> Thanks,
> Carlos
>
>
>
>
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