Troubleshooting a VPN connection may be some of the most challenging work you will ever do. Establishing a VPN tunnel involves multiple steps. A failure at any of these steps will result in a failure to establish a VPN connection. In such cases, it may help to use the following guidelines for troubleshooting:
- If the remote client or peer is not able to connect to pfSense, then it is possible that the VPN service is not running at the local end of the connection. Check to make sure that it is running.
- If the VPN service is running at either end, it is possible that one or more ports are blocked and need to be unblocked. Check to make sure that the rules allowing traffic through the necessary ports are unblocked, and that they are taking effect. Even if the rules exist, the order of the rules may be such that they are not taking effect. Consult the following...