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I have an ubuntu server with 2 network cards: eth0, with a samba server and eth1 bridged to a Virtual Box Machine running windows xp.

When I connect to the network using VPN from another winxp computer, i can ping and access my samba sharings but I cant ping my router's ip ( or the winxp machine inside virtual box. Any Ideas ?

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VirtualBox has issues with GREs across its NAT - it doesn't work. I haven't checked the latest versions, but I have not heard that has changed at this point.

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