Port forward configurations performed on the Actiontec are working well. I installed an L2TP/IPSec VPN server, tested internally and it connected successfully. So for all intents & purposes, this validates that the VPN server is correctly configured to accept inbound connections and functioning correctly.
Oct 19, 2006 How to Enable VPN Passthrough - IPsec Firewall Port - Tom May 20, 2003 List of VPN's that allow P2P and Port Forwarding : VPNTorrents
How to use PPTP VPN to access your home network through
PPTP VPN, which requires port 1723 opened on your firewall for both UDP/TCP. GRE 45 L2TP VPN, which requires port 1701 opened on the firewall for both UDP/TCP, and; SSTP VPN, which requires port 443 opened on the firewall for both UDP/TCP. OpenVPN UDP: 53 OpenVPN TCP: 80. Please use the comment box for your suggestions & feedback. VPN Ports to Open - social.technet.microsoft®.com Nov 27, 2011
I've setup the port forwarding rules for PPTP on the Fios router MI424WR Gen-2 (1723 TCP + GRE) but no avail. The Internet clients clearly see the VPN server on my home network, but they are not able to establish the data connection (hangs on "opening the connection" or "verifying the username/password" depending on the client).
A. To enable VPN tunnels between individual host computers or entire networks that have a firewall between them, you must open the following ports:. PPTP. To allow PPTP tunnel maintenance traffic, open TCP 1723. To allow PPTP tunneled data to pass through router, open Protocol ID 47. PPTP and L2TP Port Forwarding | Outsourced IT Support Oct 20, 2016 How to set up VPN server with port forwarding? | Official Apr 24, 2019