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What is a "Peer Hangup" error?
If you are trying to connect to VPN Tracker and you are getting a "Peer Hangup" error, here is what you need to know:
"Peer Hangup" or "Peer Hang Up" means that the other side you are connecting to closed the connection and stopped talking to your VPN Tracker in the middle of negotiation. Unfortunately, it's impossible to tell the reason for such a behavior from your side of the connection. The reason can only be found in the log of the device you are trying to connect to by the VPN Protocol (like PPTP or L2TP). There are a number of reasons for this error. For instance, it could potentially be that it is unhappy with some configuration. For those using PPTP, it could be due to the GRE protocol it uses, which requires routers special handling. There could be a router between you (the VPN Tracker user) and the gateway that does not support GRE, causing the connection to time-out.