I have a problem with routing traffiic between two VPNs.

At one company (Location A) has two VPN connection, with location B and location C. I would like to route traffic that comes from location B to location A thru our router (Draytek Vigor 3300) to location C.

Local IP at location A: 195.246.21.0/24 (they are using those IPs as PRIVATE IPs)
Local IP at location B: 10.251.11.0/24
Local IP at location C: 192.168.13.0/24

I’m in the process to change IPs at location A to standard private IP range (192.168.12.0/24).

My problem is how to set static route at my Router that traffic will go from B, trhu A, to C.

Any suggestion?

Thx,
Uros.