connection two remote site over central hub

Hi Community,

I have a setting as follows:

remote-site1---S2S-VPN---central-hub---S2S-VPN---remote-site2

site1 and site2 are able to communicate with any host wihthin the central hub, however I want to be able to establish communication between site1 and site2 (respectively the other way round) using the already exsisting VPN-infrastructure.
So far I have added IP-routes on the vpn-endpoints for site1 and site2 pointing to the remote network, using the vpn-endpoint in the central hub as gateway, but it looks like I have not found out how route the traffic correctly.

Could anybody give me a hint ?

Thank you very much in advance.

Regards

Tobias