I have a PPTP VPN server on a dd-wrt flashed router that I've used for years. About three weeks ago it stopped working. I've tried everything including reflashing the router, trying another working dd-wrt with PPTP VPN server enabled, and various VPN clients on various computers and phones on other networks which I know don't block any ports.

PPTP VPN: testing whether GRE 47 traffic is allowed Change directory to the location of pptpclnt.exe and type pptpclnt.exe . (for example pptpclnt.exe vpn.mydomain.com) and hit enter. When prompted specify a number between 1 and 255 and hit enter. If all packets were received successfully, your host network is able to establish PPTP VPN connections. How to set up VPN server with port forwarding? | Official Apr 24, 2019

In the end it has turned out that the VPN issue was caused not by router itself but by my service provider - later they told that through some security hole in Microsoft software they were recently severe hacked and they decided to close ports very tightly.

Apr 23, 2015 DD-WRT Forum :: View topic - pptp vpn on a specific port/ssid Jan 28, 2017 pptp Archives - Networking HowTos

VPN Server Clinic: Why did my VPN server stop working

hi, i just bought a new cisco router4321, when i try to port forward vpn ports by using following command: ip nat inside source static tcp 1723 public_ip LanVPNSvr_IP 1723 got a message "port 1723 is being used by the system", and i need to forward all following vpn ports, please help me with the ri Windows Firewall blocks PPTP VPN Mar 19, 2017 Step by Step: How to configure a PPTP VPN Server on Here is a simple step by step tutorial with images and all information that you need to get a fully working PPTP VPN server… Step 1: create VPN pool. IP pools are used to define range of IP addresses that will be used for your PPTP VPN server [admin@MikroTik] > /ip pool print NAME RANGES VPN-pool 192.168.1.101-192.168.1.110 What Is PPTP: Point-to-Point Tunneling Protocol