wireless vpn + nat

[Alin-Adrian Anton]

    Hey guys,

    I installed tinc on a linux server which connects to the internet. 
That server is linked via a wireless link with a Windows 2000 
workstation. I installed tinc on the windows box too, and the vpn works 
neat. The only problem is I don't know if the windows tap driver is able 
to forward unknown IPs to a gateway. This is because if I try to ping 
10.0.0.1 which is just another ethernet card in the router, I get a 
"destination unreachable" error, because the tinc VPN subnet looks like 
10.0.2.0/24, where 10.0.2.1 is the router end, and 10.0.2.2 is the win2k 
box. I can ping 10.0.2.1 from the win box.

    The wireless link looks like this: 10.0.1.1 is the linux router, 
10.0.1.2 is the win2k box.

    In spite of the fact that the router works correctly, it even seems 
that if I try to ping someone on internet from the windows box, I get 
destination unreachable without the packets even getting tunneled 
through the VPN by tinc, using the wireless link for transport. I tried 
it with a sniffer, and indeed, packets dont even travel through the VPN 
when I try to ping some internet IP. I conclusioned this is a limitation 
of the windows tap driver.

    If anyone knows better and can help me setup internet connection via 
strong wireless vpn for this windows box, I will deeply appreciate it.

    Best Regards,
Alin-Adrian Anton.

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