[TriLUG] OpenVPN: TAP vs TUN

Paul G. Szabady Paul at ThyService.com
Fri Nov 18 10:31:24 EST 2005


Jim,

Done that, but note, I'm not even at the point of connecting a client yet.

-- 
Paul
@ Thy Service

> make sure source and destination IP addresses are *not* on the same
> network address.
>
> regards,
>
> jim
>
> Jim Ray, President
> Neuse River Network, Inc.
>
> tel: 919-838-1672 x111
> toll free: 800-617-7652
> cell: 919-606-1772
> http://www.Neuse.Net
>
> Ask about our Clean Technologies.  Established in the Carolinas 1997.
>
>
>
> Paul G. Szabady wrote:
>
>>Greetings,
>>
>>I am trying to set up a TAP style VPN but I'm apparently missing a key
>>piece of information and was hoping someone could clarify this for me.
>>
>>I have a linux (CentOS 4.2) server w/OpenVPN (openvpn-2.1_beta7-1
>>installed from RPM built from src), and a windows 2000 server behind a
>>linksys router.  I need to be able to access the windows server on the
>>local LAN from the internet, with an IP address in the same subnet as the
>>windows server, hence the desire to set up using TAP/bridge mode.
>>(Setting up TUN was easy, but didn't work as I needed it to.)  The linux
>>machine has a single NIC, which is why this is so confusing to me.  When
>> I
>>set up OpenVPN w/TAP, I lose all network access to the linux server.
>>Having had a "home grown linux switch" (old pc w/6 NICs running in bridge
>>mode), this makes sense.  I believe I have followed all the
>>instructions/notes/suggestions from the openVPN howto as well as the
>>Ethernet-Bridge-netfilter howto.  But I'm still missing something.
>>
>>The big question:  If I am apparently invisible to the network, how does
>>one make a connection (VPN or other) to the linux server?
>>
>>
>>
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