VPN can not connect solution

VPN unable to connect the use of problem-solving methodsA VPN on the phone to useOn the phone using a VPN (Android/iPhone4) this slightly more complex, in general accordance with the tutorial business to set no great problem. But there are several issues worth noting:

If the phone network mobile 3G/2G, then it is possible to use PPTP mode to connect to VPN failure, because in some areas mobile blocking the VPN port. The solution is to use L2TP mode to connect the VPN.

VPN, on the phone using PPTP mode, if not then L2TP connection.

Andrews encountered by mobile phones when using a VPN most is the "identification of failure, this situation is not all Andrews devices will appear, Andrews systems caused by defects, there is no solution. (You can change the VPN that do not require an encrypted businesses try)

Second, the computer using the VPN problems

Here we discuss their own network, equipment problems, and direction of the first detect whether the network to support VPN, do not support set support, and then detect computer settings are correct.

VPN account and password input Yes, can be connected to the VPN did not reflect. This question is asked, can be divided into the following two kinds of situation:

a. campus users, Congratulations, you win the lottery, schools are generally blocked in the router, a VPN port, this situation can not use the VPN;

b if it is their own network, just go to the router settings allows VPN pass-through "can be used. (PS. some routers did this option does not support VPN pass-through, for example, Mercury router, the router now have this feature, TP-LINK is the most common.)

VPN connection, the feedback error, see "VPN error code list Daquan

3, VPN is very slow why? This involves two aspects, first, their own broadband whether VPN speed of response fast. The solution is the line to try to change a VPN, the VPN businesses are dozens of lines, you can switch a few times, to see if slow, if you are slow but their own broadband fast VPN line is not to force.

VPN connection when prompted does not support the encryption type. Such as merchant VPN encryption is set, then we create a connection when you have the encryption type check, for example, you have to check on Win 7 requires an encrypted (If the server is refusing to disconnect) "; if the business VPN no encryption, you have to select "Optional encryption (no encryption can also be connected).