VPN error 720 when assigning IP address

[captainpie]

Hi all, I have a VPN to my office set up that works fine. at the moment it assigns a dynamic IP to me. When I go into the properties of the VPN and then networking, then IPv4 and set a static IP, i get an error 720.

How can i get around this?

[Rance]

There is a easy fix for that. You can fix that by rebuilding the TCP/IP stack. It can be done via cmd. Type the following command : netsh int ip reset. Or else for more troubleshooting help on the same you can try to look on Microsoft article on Error 720: No PPP Control Protocols Configured. It has some troubleshooting steps that you can try out.

[captainpie]

doing this, i now get an error 800 . . .

although now gone back to the 720 error

[Aaryan2011]

VPN error 800 is one of the most common error. The troubleshooting of the same is not much complicated. The error is caused when vpn fails to establish a vpn connection. To fix this up you will need to check the following. First see that you can find a right vpn server name. Second check that your internet connection is working properly. Third ensure that your network is not blocked by firewall or any security tool. Fourth if the client is already connected and you try to reconnect it gives the error.

[captainpie]

Sorry, I should have stated that the 800 error was a one off issue, the 720 is still occurring.

[EINSTEIN_007]

One of the users was also facing similar issues and used to get error 720. Right clicking on the VPN connection, then viewing the Properties, I notice that the IPv4 and IPv6 protocols on the Networking tab will be unchecked. Checking these and clicking OK restores the VPN functionality and may stay that way for weeks...until another seemingly random error 720.

[captainpie]

i manually unticked the ipv6 protocol prior to this issue, but ipv4 is still ticked and has remained so throughout

[JAMES_911]

The first thing that you can check is whether your firewall/router (on the assumption you have one) is correctly forwarding TCP/IP port 1723 and IP protocol 47 (GRE) to the server. Many routers lump the two together as 'PPTP Service' or something similar.