[strongSwan] Issues observed with Server leases in road warrior configuration

[Tobias Brunner]

Hi Sumit,

> In this case, since the server was not notified about client going
> down, the lease was still active at server, and then later when
> client came up and asked for virtual IP, server gave a different one
> and also updated the lease with this new assigned Virtual IP.

If you use in-memory pools (i.e. `rightsourceip=<subnet>`) you could
enable the `charon.mem-pool.reassign_online` option in strongswan.conf.
 If it is enabled existing online leases will be reassigned to clients
with the same identity.

Regards,
Tobias