Route traffic from another VPN

Hello!

I have this scenario:


Site 1 <--------------- VPN over IPsec ---------------> Site 2
192.168.13.0/24 ---------------------------------------- 172.16.0.0/16

All PCs on Site 1 can access LAN on Site 2.
If any user wants to connect to Site 1 from outside, they use a OpenVPN connection to Site 1 and it can connect to LAN on Site 1 but can’t reach LAN on Site 2.

In OpenVPN client I have:


route 192.168.13.0 255.255.255.0
route 172.16.0.0 255.255.0.0

But connections to Site 2 don’t work. How can I allow that?