WireGuard roaming behind a load balancer

[John Huttley]

If you are using an F5 LTM load balancer,

Set a keepalive timeout  on  wireguard.
Assign a UDP profile with a timeout greater than the wireguard keepalive
Assign the Profile to the UDP VIP
--John



On 16/01/2019 4:45 AM, pdub wrote:
> Greetings,
> 
> WireGuard is a really cool project! Thanks!
> 
> With WireGuard's native roaming support, I have a question about just
> how stateful/stateless the roaming is. Here's a hypothetical situation:
> 
> Let's say WireGuard is being used to tunnel into a location and is
> served behind a load balancer for high availability. If both nodes have
> identical WireGuard config files at the start of WireGuard (and, for
> simplicity, let's assume the configurations don't change). If one node
> dies, the load balancer will automatically start sending packets to the
> standby node running WireGuard (perhaps existing on the same subnet as
> the other node, but with a different IP).
> 
> In a sense, the server-side "peer" has just roamed from machine to
> another, but the public/Internet IP address didn't change (because that
> is assigned to the load balancer itself). Will this work with WireGuard
> today?
> 
> TIA
> 
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