There are a number of threads reporting (Open)VPN connects to the router OK but can't connect to the LAN. After messing about for a couple of days with all firewall, forwarding settings etc, using Windows and Linux clients, I finally installed the old VPN Server software ( not "VPN Plus Server") This old version works without issue. Hope this helps someone avoid some misery and time-wasting. I'd be interested to know if anyone else has the same result. Synology RT1900a. SRM 1.1.4-6509 Update 1....
Please help
I didn't find the right solution from the internet.