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1. A 721 error appears when the VPN client is dialed in: This situation is mostly caused by the customer system, if it is WINXP and SP2 is installed, this situation may occur, and the solution is to modify the registry HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4D36E972-E325-11CE-BFC1-08002bE10318}, where is the network adapter for the WAN Miniport (PPTP) driver, create a new DWORD value ValidateAddress in this item, and set it to 0.
Incorrect server-side PPP protocol configuration can also cause such errors. 2. 800 error appears when the VPN client is dialed in: If there is still an error like this, it may be that you cannot connect to the VPN server, the VPN server may be down or malfunctioning, or the firewall on the customer's computer may block the VPN connection request, you can turn off the firewall and try.
Some clients that use a broker to connect to a VPN server may also experience this error due to a malfunction in the broker server. 3. 619 error appears when the VPN client is dialed in: Most of the reasons for this situation are that the NAT-T function of the gateway connecting to the Internet (such as home broadband routing, corporate Internet gateway routing, or firewall) is turned off or VPN support is not good, mainly because NAT-T of GRE and PPTP protocols is not supported. The NAT-T function that can open gateway routes, if there is still an error, you need to replace the gateway device, which is now supported by most devices on the market. 4. A 691 error appears when the VPN client is dialed in: Most of the reasons for this situation are abnormal interruptions in the VPN server connection between the client, because most servers limit one account to only one person at the same time, so once the abnormal disconnection occurs, you need to wait for about 3 minutes. Some VPN servers do not have an abnormal disconnection check, which may also cause users to be unable to connect for a long time after an abnormal disconnection. So the solution is to set up an abnormal disconnection checker or function on the server. 5. 733 error appears when the VPN client is dialed in: In most cases, the client cannot obtain the IP address after dialing into the VPN server, so you can fix the DHCP server or set a static IP address or address pool. 6. 734 ppp link control protocol termination occurs when the VPN client dials in: In most cases, there is a problem with the VPN server configuration, and if there is a problem with the PPP configuration, MPPE encryption is not supported or the support is not good. Please recompile the PPP and MPPE related programs. For users using game proxies, encryption can be dispensed with (encryption is not required on the server side). 7. 718 error appears when the VPN client is dialed in: Wrong username and password when dialing in, sometimes because of server-side authentication service failure.
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Posted on 5/18/2015 11:34:44 PM
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