SoftEther VPN User Forum

Hi~ I have set up softether vpn server on my PC using port forwarding function on router and works well with remote softether vpn client. But I failed to use L2TP connection on my iphone and samsung S22. Is there any configuration needed on router or my PC, such as open certain ports?
Thanks for any answering.

allow UDP 500 and 4500

Thank you so much. The problem solved successfully.