Troubleshooting the most common internet connection errors. VPN Error Codes Error Code 624 Connection Not Established

If an error occurs when starting the VPN connection, then you need to remember its three-digit code. As a rule, errors have the code 6XX ( errors associated with incorrect password entry, name or communication protocol type selection and indicate that the network is working, but you need to check the input data), 7XX( errors related to incorrect connection settings and indicate that the network is working, but you need to check the settings) or 8XX ( errors related to network setup problems or lack of network connectivity).
Below are some of the codes:

The encoding attempt failed because no valid certificate was found.
Causes of occurrence: The VPN client is trying to use the L2TP/IPSec protocol to connect.
Advice:
Enter VPN connection settings-Properties->Network->VPN Type and select PPTP VPN

789
Wrong VPN connection type selected
Advice:
Go to the VPN connection settings and on the "Network" tab from the "Type of VPN" list, select "Automatic" or "PPTP VPN". Try to reconnect

800
Failed to create a VPN connection. The server is unavailable or the security settings for this connection are not configured correctly
Possible reasons:
1. Firewall blocks outgoing VPN requests
2. There is no connection to the local network.
3. someone changed access attributes (instead of vpn - international phone number).
4. For some reason, the request does not reach the server, i.e. perhaps the gateway of your segment does not allow the request due to the load or failure.
5. stack destruction
Advice:
1. In the firewall, you need to open TCP port 1723 and IP protocol 47 (GRE), or, if required by the firewall settings, enter the IP address of your VPN server (the IP is specified in the information for the client).
2. Check if there is a physical connection (whether the lights on the network card on the back of your computer are on), whether the network cable is plugged into the slot on the network card and into the socket (if any). Then check if LAN connection is enabled. To do this, click the "Start" button, then "Control Panel", then "Network Connections". In the window that appears, find "Local Area Connection" and turn it on if it was turned off. Check TCP/IP protocol settings - Click the "Start"->"Run" button. In the line, enter the command “cmd”, in the DOS window that opens, enter the command “ipconfig” - it should give your IP address, subnet mask and default gateway, if this information is not available, it means that the local network is turned off or there is no physical connection.
3. Make sure that the VPN server address is correctly specified in the VPN connection settings (VPN-Properties->General->Computer name or destination IP address).
4. Check the signal passing with the ping command to your gateway, and then to your VPN server.
Click the "Start"->"Run" button. In the line, enter the command “cmd”, in the DOS window that opens, enter the command:
ping 192.168.100.254
ping 80.252.128.110 (10.255.255.32)
where in this case 80.252.128.110 is the VPN server and 192.168.100.254 is the gateway address. You can find out your access server and gateway address in the “subscriber profile” or using the “ipconfig” command (see point 2).
If in the DOS window that opens you see something like "The specified host is not available" or "The request timeout has been exceeded", then there may be problems on your computer or on the line. If a response comes from the host at the specified speed (usually it happens quickly), then most likely the problem is in your computer. In any case, check the second point (2).
5. Destruction of the stack - a description of some general failure in the interaction of network components that make up the TCP / IP stack. The reasons for the occurrence may be damage to OS files (disk failure), invasion of viruses and Trojans, errors during reconfiguration (did not give a distribution kit, did not remove the old network card driver before installing a new one). Fixed by repairing corrupted files, removing viruses, and Reinstalling Windows. Install and reconfigure the network components and VPN connection according to the network setup instructions.

Automatic or voluntary blocking
Incorrect login or password
The VPN server is incorrectly specified in the settings (should be vpn.site)
There is a user or administrative block in the statistics system.

Error 868

Causes

The remote connection could not be established because the name of the remote access server could not be resolved.

Solution

This error occurs only in the Windows 7 operating system.

Disable-enable "Local Area Connection". Start → Control Panel → Network and Internet / Network and Sharing Center → Change adapter settings, Turn off and on "Local Area Connection".
Restart DNS Client Services. Start → Control Panel → System and Security / Administrative Tools → Services - find the "DNS client", right-click and select "Restart".

Also, error 868 can be analogous to error 800.

Error 800/868

The error occurs when the computer is unable to contact the VPN server. First take note of the server addresses − vpn.site You can only connect to this address, not to any others.

Status (Enabled/Disabled) Local Area Connections (may also be referred to as LAN or Broadband Connection).
The VPN server address is correct and the security settings are configured.
Are you getting an address from our DHCP server.
Is there a physical connection.
Firewall settings.

1. In Windows 2000/XP/2003 systems, "Local Area Connection" is disabled

Open the "Control Panel" (Start → Control Panel).
Open "Network Connections" by double-clicking.
Right click on "Local Area Connection". If the top menu item is called "Enable", select it with a left click.

Examination.
If everything went well, then at the bottom of the screen you will see an inscription with approximately the following content: “Connected”. Now try to connect as you normally would.

2A. Error in security settings

Try to connect.

2B. VPN connection settings broken

Make sure that the server address is specified in the properties of the VPN connection on the General tab vpn.site.

3. Checking for the assignment of the "correct" address

Option 1:

For Windows 98/Me systems:

Start → Run → command → Enter. In the window that opens: winipcfg → Enter (Enter).

For Windows 2000/XP/Vista/7 systems:

Start → Run → cmd → Enter (Enter). In the window that opens: Write ipconfig → Enter.

Option 2:

For Windows XP systems:

Start → Settings → Control Panel → Network Connections → right click "Local Area Connection" → Status → Support → Details.

For Windows Vista/7 systems:

Start → Control Panel → Network and Sharing Center → Manage Network Connections (Windows Vista) or Change adapter settings (Windows 7) → right-click "Local Area Connection" → Status → Details.

"Invalid" addresses are those that start with 169.X.X.X. Windows assigns this address automatically if it fails to connect to the DHCP server (the server that issues IP addresses to clients). If you receive such an address, then you need to call the Technical Support Service.

4. No physical connection between cable and network card

Usually, this situation is indicated by the so-called "red cross" on the connection.

In this case, you need to make sure that the network cable connector is securely inserted into the network card. To do this, you can pull it out of the network card and insert it back. Usually, a characteristic click is heard.

If you are sure that the connection is reliable, then in order to solve this problem, you will need to contact the technical support service.

5. Firewall settings

Error 650: "The remote access server is not responding"

The Internet access server is unavailable. Check if "Local Area Connection" is enabled.

Windows XP/2000/2003

Start → Control Panel → Network and Internet Connections/Network Connections → Local Area Network or LAN Connection and High-Speed Internet → Properties → Internet Protocol TCP / IP, select, click the "Properties" button. Check the boxes "Obtain an IP address automatically" and "Obtain DNS server address automatically".

Windows Vista/7

Start → Control Panel → Network and Internet/Network and Sharing Center → Manage network connections (Windows Vista) / Change adapter settings (Windows Vista 7) → Local Area Connection → Properties → find Internet Protocol TCP/IP version 4, highlight , click the "Properties" button. Check the boxes "Obtain an IP address automatically" and "Obtain DNS server address automatically".

Also, this error may occur due to a malfunction of the network card, or network cable.

Error 735: "The requested address was rejected by the server"

The error occurs if the VPN connection has a hardcoded IP address in the TCP/IP protocol properties of the VPN connection.

Solution

Go to the Properties of the VPN connection, open the Network tab, find the Internet Protocol TCP / IP, select, click the Properties button. Check the boxes "Obtain an IP address automatically" and "Obtain DNS server address automatically". Press OK. Try to connect.

Error 789: "Invalid VPN connection type selected"

Windows XP/2000/2003

Go to the properties of the VPN connection and on the "Network" tab, from the "Type of VPN" list, select "Automatic". Try reconnecting.

Windows Vista/7

Go to the properties of the VPN connection and on the "Security" tab, from the "VPN type" list, select "PPTP VPN Point-to-Point Tunneling Protocol". Try reconnecting.

Errors 741-743: "Encryption settings are incorrectly configured"

Windows XP/2000/2003

Go to the properties of the VPN connection, and in the "Security" tab, disable the "data encryption" item.

Windows Vista/7

Go to the properties of the VPN connection, and in the "Security" tab, from the "Data encryption required" list, select "Optional".

Errors 600, 601, 603, 606, 607, 610, 613, 614, 616, 618, 632, 635, 637, 638, 645

Restart your computer. If the error persists, try reinstalling the VPN connection (deleting and setting up a new one), check your computer for viruses or remove recently installed programs, or undo recent changes in Windows settings, if any.

Errors 604, 605, 608, 609, 615, 620

Restart your computer. If the error persists, delete and re-create the VPN connection.

Errors 611, 612

Windows internal network configuration is incorrectly configured. Restart your computer and make sure that the local network is functioning properly on your computer. If the error persists, contact technical support. In addition, the error may be caused by a lack of resources (memory) on your computer. Try closing running programs.

Error 617

Windows is in the process of connecting to the Internet, or an internal Windows error has occurred.

Wait a few minutes. If the connection is not established, and when reconnecting, the error repeats, then restart the computer.

Error 619

The security settings of the VPN connection are configured incorrectly, VPN traffic is blocked on the way to the gateway, or the VPN settings did not take effect.

In the properties of the VPN connection, open the “Security” tab - “Normal (recommended settings)” should be selected there and the “Data encryption required” checkbox is unchecked for Windows XP / 2000/2003 or for Windows Vista / 7 from the “Data encryption” list should be "Optional" is selected. Restart your computer and try connecting again. Check your firewall settings, and if you are not sure if they are correct, disable it. If your computer does not receive a response when using the ping command (Start → Run), then there are network problems and you need to report the problem to technical support.

Error 623: Cannot find an entry in the phone book.

Solution

Open the Network Connections folder.
Right click on the dial-up connection.
Select "Set as default connection".
Right-click on the dial-up connection selected in step 2.
Select "Do not use as default".
Reboot.

Error 678

Error 711: Failed to initialize the remote connection manager. Check the event log.

This behavior occurs when the following system services are disabled:

Telephony.
Remote Access Connection Manager.
Remote Access Auto Connection Manager.

To solve the problem, enable the disabled services and start them:
From the Start menu, right-click My Computer and select Manage. Double-click Services and Applications, and then double-click Services. Right-click the Telephony service and select Properties. On the General tab, set Startup Type to Auto. In the Status group, click the Start button (the button may be grayed out if the service is running). Click the OK button.

Follow the same steps for the "Remote Access Connection Manager" and "Remote Access Auto Connection Manager" services.

Error 718

Try connecting again. This error is usually related to work on the authorization server and is eliminated within 10-15 minutes.

Errors 720

Repairing a corrupted Winsock configuration:
Enter on the command line netsh winsock reset.

Note

After executing the command, restart your computer.

Warning

Running the netsh winsock reset command can be bad for programs that use or control access to the Internet, such as antivirus programs, firewalls, or proxy clients. If one of these programs does not work properly after using the method in question, reinstall the program to restore its functionality.

If these operations do not solve the problem, follow the instructions below.

Delete the corrupted registry keys and reinstall the TCP/IP protocol.

Removing corrupted registry keys

In Registry Editor, locate the following keys, right-click each one, and select Delete:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Winsock2
After deleting the registry keys, restart your computer. After rebooting, Windows XP will re-create these partitions.

TCP/IP Installation

Right-click the network connection and select Properties.
Click the Install button.
Select Protocol and click Add.
Click the Install from Disk button.
Type C:\Windows\inf and click OK.
Select Internet Protocol (TCP/IP) from the list of protocols, and then click OK.
(very rare) In the list of protocols, select Internet Protocol (TCP/IP) 4 and click OK.

Error 733: The PPP control protocol for this network protocol is not available on the server.

Windows XP/2000/2003

Start → Control Panel → Network and Internet Connections/Network Connections. Right click on the VPN connection. Click Properties. Select the Network tab. Uncheck all protocols except Internet Protocol and QoS. Reconnect.

Windows Vista/7

Start → Control Panel → Networks and Internet/Network and Sharing Center. Right click on the VPN connection. Click Properties. Select the Network tab. Uncheck all protocols except Internet Protocol TCP/IP version 4. Reconnect.

Error 734: The PPP link control protocol was terminated.

This issue occurs because a single-link connection uses multilink negotiation.

Solution

Windows XP/2000/2003

Start → Control Panel → Network and Internet Connections/Network Connections. Right-click the VPN connection and select Properties. Open the Network tab and click the Options button. Uncheck "Negotiate multi-link connection for single-link connections" (if checked). Press the OK button twice. Double click on the VPN connection and click the Connect button.

Error 769

The error occurs due to a disabled LAN connection or lack of physical connectivity. It is recommended to check the status of the LAN (should be enabled) and the physical connection to the network (network cable must be connected).

Check if the network cable is connected to the computer, if it is connected, then check if the light next to the wire is on.
Enable "Local Area Connection".
Windows XP/2000/2003
Click Start → Control Panel → Network and Internet Connections/Network Connections. Right-click on the "Local Area Network Connection (LAN or High Speed Internet)" icon. If the top menu item is called "Enable", select it with a left click. If everything went well, then at the bottom of the screen you will see an inscription with approximately the following content: “Connected”.
Windows Vista/7
Start → Control Panel → Networks and Internet/Network and Sharing Center → Manage network connections (Windows Vista) or Change adapter settings (Windows 7). Right-click on the "Local Area Connection" icon. If the top menu item is called "Enable", select it with a left click. Examination. If everything went well, then at the bottom of the screen you will see an inscription with approximately the following content: “Connected”. If there is a red cross on the Local Area Connection icon, contact technical support.

Error 400: Bad Request.

Indicates that the server encountered a syntax error in the client's request.

Disable the firewall (firewall) or programs that affect network activity and security.
Try updating your current browser or using a different one.
Set the default browser settings and reset all saved files, certificates, etc., i.e. delete everything that the browser writes to disk.

Error 624: Problem connecting to VPN

Solutions to the problem:

The RASPHONE.PBK file is missing in (Windows folder)/system32/RAS or... Documents and Settings/(your user or all users)/Application Data/Microsoft/Network/Connections/Pbk, and even if it exists, then rename it into something else, for example RASPHONE.OLD, you can also run rasphone.exe, it can help.
There is a prohibition on creating a connection: allow users to create new connections. Start - Run - gpedit.msc and sort it out there.
Access to the folder Documents and Settings/All Users/Application Data/Microsoft/Network/Connections/Pbk is denied - Share the folder. Most likely, the problem can be solved in this way: uncheck the "Read Only" item in the properties of the Rasphone.pbk file.

If an error occurs when starting the VPN connection, then you need to remember or write down its three-digit code.

As a rule, errors have the code:

6XX (errors associated with incorrect password entry, name or communication protocol type selection and indicate that the network is working, but you need to check the input data);

7XX (errors related to incorrect connection settings and indicate that the network is working, but you need to check the settings);

8XX (Errors related to problems in the network setup or lack of network connectivity. If you encounter this series of errors, please contact support).

Error: 600, 601, 603, 606, 607, 610, 613, 614, 616, 618, 632, 635, 637, 638, 645

Description:
An internal Windows error has occurred.

Elimination method:
Restart your computer.
If the error persists, check your computer for viruses.
Remove recently installed programs, or undo recent changes to Windows settings, if any.

Error: 604, 605, 608, 609, 615, 620

Description:
The Windows Dial-Up Subsystem phone book file and the current Network Dial-Up Access configuration are not compatible with each other.

Elimination method:
Restart your computer. If the error persists, then delete and re-create the VPN connection.

Error: 611

Description:

Elimination method:
Restart your computer and make sure that the local network is functioning properly on your computer.
If the error does not disappear, then contact the technical service. support.

Error: 612

Description:
Windows internal network configuration is incorrectly configured.

Elimination method:
Similar to error 611.
In addition, the error may be caused by a lack of resources (memory) on your computer.
Try closing running programs.

Error: 617

Description:
Windows is in the process of connecting to the Internet, or an internal Windows error has occurred.

Elimination method:
Wait a few minutes.
If the connection is not established, and when reconnecting, the error repeats, then restart the computer.

Error: 619

Description:
The security settings of the VPN connection are configured incorrectly, VPN traffic is blocked on the way to the gateway, or the VPN settings did not take effect.

Elimination method:
In the properties of the VPN connection, open the "Security" tab - "Normal (recommended settings)" should be selected and the "Data encryption is required (otherwise disconnect)" checkbox should be unchecked.
Restart your computer and try connecting again.
Check your firewall settings, and if you are not sure if they are correct, disable it.
If your computer does not receive responses when pinging, then there is a problem with the network and you should report the problem to the support team.

Error: 624

Description:
Prohibition to create a connection.

Elimination method:
There is no Rasphone.pbk file in (Windows folder)/system32/RAS or … Documents and Settings/(your user or all users)/Application Data/Microsoft/Network/Connections/Pbk, and even if it exists, rename it to something else like RASPHONE.OLD, you can also run rasphone.exe, might help.
There is a ban on creating a connection.
Allow users to create new connections.
"Start" - "Run" - gpedit.msc and sort it out there.
Folder access denied
Documents and Settings/ All Users/ Application Data/ Microsoft/ Network/ Connections/ Pbk - Share the folder.
But most likely the problem can be solved in this way: uncheck the "Read only" item in the properties of the Rasphone.pbk file.

Error: 629

Description:
The VPN connection was terminated due to poor connection quality or after unsuccessful negotiation.

Elimination method:

Error: 633

Description:
The modem is already in use or is not configured for outgoing calls.

Elimination method:
The VPN device to be used by the network cannot be opened.
Please contact technical support.

Error: 635

Description:
An error has occurred in Windows.

Elimination method:
Try to re-establish the VPN connection, or Windows entirely.
If nothing helps, contact technical support.

Error: 642

Description:
Your computer has been assigned a NetBIOS name that is already in use on the network.

Elimination method:
Change the computer name in the properties of "My Computer" in the "Identification" section.

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Restart your computer. If the error persists, try deleting your current VPN connection and creating a new one using . Check your computer for viruses. Remove recently installed programs, or undo recent changes to Windows settings, if any.

Errors 604, 605, 608, 609, 615, 620

The Windows Dial-Up Subsystem phone book and the current Dial-Up Networking configuration are not compatible with each other.

Restart your computer. If the error persists, then delete and re-create the VPN connection using the universal VPN installer for Windows.

Errors 611, 612

Windows internal network configuration is incorrectly configured.

Using a specialized network diagnostic utility (AFIS) from the client software package, do the following:
- Run the utility
- Go to the "Autodiagnostics" tab and click "Start Process"
- At the end of the process, the utility will offer to fix errors if they were found. Click Yes.
If the error is not corrected, restart your computer and make sure that the local network is functioning normally on your computer. If the error does not disappear, then contact the technical service. support. In addition, the error may be caused by a lack of resources (memory) on your computer. Try closing running programs

Error 617

Windows is in the process of connecting to the Internet, or an internal Windows error has occurred.

Wait a few minutes. If the connection is not established, and when reconnecting, the error repeats, then restart the computer.

Error 619

The security settings of the VPN connection are configured incorrectly, VPN traffic is blocked on the way to the gateway, or the VPN settings did not take effect.

In the properties of the VPN connection, open the "Security" tab - "Normal (recommended settings)" should be selected and the "Data encryption required (otherwise disconnected)" checkbox should be unchecked. Restart your computer and try connecting again.
You can also remove an existing VPN connection and create a new one automatically using the universal VPN installer for Windows.

Error 624

Missing RASPHONE.PBK file in (Windows folder)/system32/RAS or... Documents and Settings/(your user or all users)/Application Data/Microsoft/Network/Connections/Pbk. If the file is present, then try renaming it to something else, for example RASPHONE.OLD, you can also run rasphone.exe, may I help.
There is a ban on creating a connection. - Allow users to create new connections.
Folder access denied Documents and Settings/All Users/Application Data/Microsoft/Network/Connections/Pbk- Open access to the folder. But most likely the problem can be solved in this way: uncheck the "Read-only" item in the file properties Rasphone.pbk.

Attention!!!
If you do not have the skills to administer the Windows operating system, it is not recommended to perform the described actions yourself! Contact the technical support service by phone 49-69-00.

Error 629

This type of error occurs when there is no connection between your computer and the access server.

Download the client software package
Check that your equipment is properly connected to the network.
The LAN cable may not be connected or the connectors may be loose.
Your computer's network adapter may not be working properly. To resolve the problem, you may need to reinstall the network adapter driver.
The cable may have broken, or the access server may have been disabled.

Error 650

The remote access server is not responding. The Internet access server is unavailable.

Check if "Local Area Connection" is enabled, if the network card is working, if the network cable is working, if the client's IP address is set correctly in the IP connection settings.
Download the client software package, install and run a special connection diagnostic utility (ADIS - diagnostic and network connection assistant), go to the "Auto-diagnostics" section and start the process. At the end of the diagnostics, you will be prompted to correct the errors found. Click Yes (fix). If the error has not disappeared, perform the operations described in paragraphs 2 - 4.

Error 651

If you are connecting to a virtual private network (VPN), you may have specified an incorrect TCP/IP address when you set up the connection, or the server you are trying to connect to is not currently available. Server availability can be obtained from the technical support service (49-69-00).

Error 678

The connection could not be established because the remote computer did not respond to the connection request. Do the following:

Check that the hostname or IP address of the destination server is correct and try to connect again. To view connection properties, right-click the desired connection, select Properties, and then view the details on the General tab. For more information, contact technical support.
Connection attempts may be blocked by a network device such as a firewall or due to network congestion. For more information, contact your administrator.

Error 691

Problem connecting to VPN.

There is no money in the user's account.
Login or password is incorrect.
The VPN server is incorrectly specified in the settings.
The client's personal account is blocked in the statistics system.

Error 718

A PPP connection was initiated but could not be established because the remote computer did not respond in a timely manner or its response was invalid.

Try entering the domain name and username in the "Username" field in the following format: DOMAIN\ Username and try connecting again.
Connection attempts may be blocked by a network device such as a firewall or due to network congestion. Please try to connect later. For more information, contact your administrator.
You may need to install updated drivers for your network card or other communication device. For more information, contact the hardware manufacturer.

Error 721

The remote computer is not responding.

This issue can occur if the network firewall does not allow GRE traffic. GRE is IP protocol 47. PPTP uses GRE for data tunneling. To resolve this issue, you must configure your network firewall to allow GRE protocol 47. You must also ensure that your network firewall allows TCP traffic on port 1723. Both of these conditions must be met to establish a VPN connection using PPTP.

Error 735

The requested address was rejected by the server.

You have configured the VPN connection incorrectly to access the Internet. Most likely, in the TCP / IP settings of the VPN connection, you registered a specific IP address when it should be allocated automatically.

Error 737

The local and remote computers involved in the PPP session are the same computer. This means that a device, such as a modem, on the line receives the reflected characters back. Try resetting the devices.

For non-IBM servers, this may mean that the remote server tries to log in using teletypewriter (TTY) before connecting. Terminal configuration for use after connection is established can be done on the security tab

Errors 741 - 743.

Encryption settings are incorrectly configured.

Go to the VPN connection settings, and in the "Security" tab, disable the "data encryption" item.

Error 769

Most likely, the network adapter is disabled in the device manager.

Turn on the network adapter and try connecting again.

Error 789

Wrong VPN connection type selected

Go to the VPN connection settings and on the "Network" tab, from the "Type of VPN" list, select "Automatic". Try reconnecting.

Error 800

Problem connecting to VPN

Possible reasons:

The firewall blocks outgoing requests for VPN connections, which in principle happens, but not so often.
For some reason, the request does not reach the server, i.e. perhaps the backbone equipment of your segment does not pass the request due to a load or failure.
The server sends a response about the inability to connect. At the moment, there are a large number of simultaneous attempts to connect from your account.
For some reason, your set of equipment does not work.

Possible fixes:

Check is enabled and running at this point in time.
Check signal passing by command ping to the vpn server.
Restart your computer.
Contact technical support at 49-69-00.