Note that using Bonjour or NETBIOS hostnames is generally not possible over VPN.Ģ. Please make sure DNS is enabled for the VPN connection and correctly configured. If that works, the problem has to do with DNS resolution. If you are using a host name, please try once using its IP address instead. Are you trying to connect to the destination device using a host name? The destination device can be anything from a normal computer, to a server, to a network printer.ġ. In this FAQ we will be using destination device as a generic term for the device you are trying to connect to. This FAQ will help you to find out what is causing the problem in your specific situation. There are a number of possible causes for such a behavior. it is blocked) and thus the test result are just bogus and say nothing about the true capabilities of your VPN gateway. This is rarely needed and also not recommended but there might be situation where the test results are wrong because access to our VPN gateway is not possible (e.g. The test dialog also allows you to tell VPN Tracker to not test the current location and forget any previously created test results. ‣ Wait until the test has completed, then connect to your VPN ‣ Go to "Tools" > "Test VPN Availability" If you suspect a NAT-Traversal issue or you think the previous test results may be wrong or outdated, simply re-run the test: ‣ Make sure NAT-Traversal (Advanced tab) is set to Automatic If there is no match, VPN Tracker will immediately stop and show an appropriate error in the log, explaining the situation. If there is a match, a method that your gateway supports and that was also working during the test, this method will be used. VPN Tracker will compare the methods your gateway supports with the stored test results. The second property is not tested in advance, VPN Tracker will become aware of that information when it actually tries to connect to your VPN gateway. The reason we are testing with our own gateway is simply that the test requires a gateway supporting all three methods, with a known configuration and a simply way to verify if traffic did arrive at that gateway. It will remember the test results for this router and take them into account whenever you start a connection from the network location. One connection uses plain ESP, the other two either NAT-T method mentioned above. To test for the first property, VPN Tracker will automatically establish three VPN test connections to a VPN gateway hosted by us whenever it detects a new router that has not been tested before. Which of these methods are supported by your VPN remote gateway.Which of these methods allows traffic to pass through your local Internet router.Which of these methods will work with your connection depends on two properties: NAT-Traversal (new, RFC standard version). To work around this problem, two alternative tunneling methods exist: Only NAT routers that support " IPSec Passthrough" (sometimes also named " VPN Passthrough" or " ESP Passtrhough") and where this option is also enabled, can handle ESP data packets. Since the ESP protocol does not use network ports, NAT (Network Address Translation) routers may have difficulties handling it correctly. IPsec VPN uses a different protocol (ESP) for the actual data transfer than for establishing the connection (IKE).
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