How to forward traffic to branch site server after client established VPN tunnel
Scenario: Site#A and SiteB are established site to site VPN tunnel. How to forward traffic to Site#B after client connected VPN tunnel to Site#A.
VPN client can be L2TP/SSL VPN/ IPSec VPN. Client will get the IP address which assigned by Site#A router.
In this scenario, VPN client got IP 10.10.10.1 after established L2TP VPN tunnel to Site#A.
You can add policy route rule on both of routers to forward traffic.
(1) On Site#A (Rule for traffic to Site#B)
(2) On Site#B (Rule for traffic back to Client on Site#A)
After added these rules on both of firewalls, then traffic is able forward to server without any problem.