VPN server is rejecting connection

Asked By 200 points N/A Posted on -

My VPN server is rejecting client connections.

I have double checked my VPN settings, and I can't figure out why it denied the connections.

This works for 4 days then suddenly connections died for some reason.

I tried rebooting the main router that handles the VPN connection, but it didn't help. 

This really a critical problem for me because a lot of people at work will be affected by this.

We have been trying to fix this matter for a week now.

I have been trying to Google it and can't find anything that works for me.

Your solutions would be most appreciated. 

Answered By 0 points N/A #112564

VPN server is rejecting connection




A virtual private network (VPN) is a way of establishing connection between one or more networks i.e.

The office network and the  internet. Through calls to the nearest internet phone number it allows the accessing and sharing of resources globally and most of all the office. Different type of networks troubleshooting can be applied to different operating systems.

A VPN Client can be a piece of software or hardware. It initiates a ‘call’ to the server and logs on. Then the client computer and server network communicate on same ‘virtual’ network. Broadband routers can pass VPN sessions from your LAN to the Internet. Each router operates differently.


One needs to do a complete check of the system in order to determine the faults causing the system to malfunction .first check if you can open the VPN software, if not shutdown or restart your machine for approximately one minute before restarting.

On the other hand if you can open the VPN software and unable to access the VPN server check network status and unplanned outages with the server, if the problem not solved uninstall the VPN software and re-install it.

Make sure you are connected to the internet before VPN connection check VPN software configuration settings, ensuring it’s not authentication errors.

Ensure that VPN password is not same as expedient dial-up. E-mail password even if have same usernames should be both of lower case letter.try using@*****.edu account to log on and access VPN server. Remove encrypt password in the configuration tab of the VPN client

Ensure that only one instance of VPN is installed since only one session is allowed for each user at any time as authentication problem will result due to more than once log on.

Make sure your routers ports are correctly forwarded to your server. if using L2TP with IPSEC change shared secret to something easy and simple and check if  can log in as it can mess VPN shared secrets  Tl:dr

If it doesn’t work yet remove the entire VPN service in order to terminate all session. Switch VPN pass through off and on again on the router.

If not set system preference to be Ethernet first as VPN server connects to the internet with it. If not better still use local IP, not public fixed IP .if it works then means that VPN server works well.

Change the router firmware to DD-WRT, these flashes the router. Can also try upgrading the Cisco Linksys E3000 to v1.003 or stop and restarting VPN services will resolve your problems.

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