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Re: [Openvpn-users] vpn routing question


  • Subject: Re: [Openvpn-users] vpn routing question
  • From: Erich Titl <erich.titl@xxxxxxxx>
  • Date: Mon, 03 Oct 2005 18:49:37 +0200

Jason Keltz wrote:
...
There are two VPN servers for load balancing/redundancy issues.
Each client on startup chooses a VPN server to connect to.
However, a client will only connect to one or the other.
In the event of a failure, a client will connect to the other VPN server.

Indeed if you are using two distinct VPN networks the load balancing issue can be solved easily. The failover issue is the same with the exception of a seamless hand over.



In terms of adding routes back to the VPN subnets, that is what I want to do, but that is where there is a tricky problem...


When an individual client connects to either VPN server, it will get the exact same IP. This is done so that software (like NFS) will be able to basically handle a client moving from one VPN to the other if a VPN server goes down...

Mhhh... NFS is stateless AFAIK. I don't know what happens when a NFS mount goes down on the server and/or client, but I assume it will have to be recovered anyway and cannot be seamlessly handed over. Most other protocols will fail anyway.


cheers

Erich


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