You can check to see which authentication methods the VPN server is configured to use by entering the MMC command at the Run prompt. Networking: Must-read coverageĥ programming languages network architects should learn (free PDF)īehind the scenes: A day in the life of a database administratorĢ0 steps to decommission a redundant data center facilityġ7 Terminal commands every user should know Both the VPN client and the VPN server must have at least one authentication method in common. As you may know, there are a lot of different authentication methods available to a VPN connection. Once you’ve established that there is a valid TCP/IP connection between the VPN client and server, and that name resolution is working correctly, the next thing to check is the authentication process. If this ping fails where the IP address ping succeeded, you have a DNS problem, because the client is unable to resolve the server’s name to an IP address. If the ping is successful, then ping the server again, but this time ping by the server’s fully qualified domain name (FQDN) rather than by its address. You should ping by IP address initially so that you can verify that basic TCP/IP connectivity exists. Once you’ve verified that the necessary services are running, try pinging the VPN server by IP address from the VPN client. You can check this by opening the server’s Control Panel and clicking on the Administrative Tools icon, followed by the Services icon.

If your VPN server is rejecting client connections, the first thing you need to do is to check to make sure the Routing And Remote Access service is running. Part of the reason this problem is so common is that there are a lot of issues that can cause a connection to be rejected. Having a VPN client’s connection rejected is perhaps the most common VPN problem.

The inability to reach locations that lie beyond the VPN server.

The acceptance of an unauthorized connection.

There are four types of problems that tend to occur with VPN connections. SEE: How to work from home: IT pro’s guidebook to telecommuting and remote work (TechRepublic Premium) What’s the problem? Here are several techniques you can use to troubleshoot VPN connections. Even so, VPN connections do occasionally experience problems.

Although VPNs initially became popular because they free companies from the expense of connecting networks with dedicated leased lines, part of the reason that VPNs have become so accepted is that they tend to be very reliable. VPNs have gone from obscurity to being a common method of linking private networks together across the Internet. This tip was first published in May 2003. Editor’s note: In the video, Brandon Vigliarolo uses Microsoft Windows Server 2016, and some of the steps and menus are different from the following tutorial by Brien Posey.

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