788 error. The L2TP connection attempt fails because the security layer cannot authenticate the remote computer. How can this problem be solved?

You need to ensure that the IPsec Policy Agent service has been automatically started by the random machine, and the IPsec Policy Agent Startup Mode has been changed to automatic in Computer Management Service.

600
An internal error occurred. Restart

601
Invalid Port Detected

602
Problem: the specified port is enabled. the dial-up network cannot be connected due to a device installation error or in use.
Cause: the virtual dial-up software is not completely and correctly installed,
Solution: exit the com application, uninstall any code pulling software, and reinstall the code pulling software.

603
The buffer is too small and an internal error occurs.

604
Error message specified. Reconfigure "network and dial-up connections"

605
Port information that cannot be set, the same as the 604 Method

606
The port is not connected. Internal error, restart

608
The specified device does not exist. Create a new "network and dial-up connection"

609
The specified device type does not exist. Same as the 604 Method

610
The buffer is invalid. Internal error, restart

612
No route is assigned.

615
The port cannot be found.

616
An asynchronous request is suspended.

617
The port or device is disconnected.

618
The port has not been opened.

619
The port is disconnected.

Cause: Account Password error, fee expiration or code pulling Software Error

Solution: Check whether the fee expires. If not, re-enter the account and password. If the problem persists, re-create the "Broadband connection"

621
The phone book file cannot be opened.

622
The phone book file cannot be loaded.

623
The phone book entry cannot be found.

624
The phone book file cannot be written.

625
Invalid information found in the phone book.

627
The key cannot be found.

628
The port is disconnected.

629
The port has been disconnected from the remote computer.

630
The port is disconnected due to hardware failure.

631
The user has disconnected the port.

632
The structure size is incorrect.

633
The port has been used or is not configured for remote access.

635
Unknown error.

636
The port is connected to the wrong device.

638
The request has timed out.

645
Internal authentication error.

Problem: The NIC does not respond correctly
Cause: Nic fault or NIC Driver fault
Solution: Check the NIC and reinstall the NIC Driver.

646
This account is not allowed to log on at this time.

647
This account is disabled.

648
The password has expired.

649
The account has no remote access permission.

650
Problem: the remote computer does not respond and the connection is disconnected.
Cause: Network Protocol Error Caused by adsl isp Server fault, Nic fault, abnormal Shutdown
Solution: Check whether the ADSL signal lamp can be correctly synchronized; check the network card, delete all network components and reinstall the network
.

651
Your modem (or other connected devices) reports an error. (Windows 651 and Windows XP 678 have the same causes)

Method: Check whether the local connection is "X", whether the NIC light is on, and whether the NIC crystal header is loose. Re-plug the NIC. If the problem persists, ask the technician

652
Unable to identify the response from the device.

653
The macros required by the device cannot be found in the device. inf file segment.

654
Commands or responses in the device. inf file segment reference undefined macros.

655
The <message> macro cannot be found in the device. inf file segment.

656
The <defaultoff> macro in the device. inf file segment contains undefined macros.

657
The device. inf file cannot be opened.

658
The device name in the device. inf or media. ini file is too long.

659
The media. ini file references an unknown device name.

660
The device. inf file does not contain any command response.

661
The device. inf file lacks a command.

662
You have attempted to set macros not listed in the device. inf file segment.

663
The media. ini file references an unknown device type.

664
Memory cannot be allocated.

665
The port is not configured for remote access.

666
Your modem (or other connected devices) does not work.

667
The media. ini file cannot be read.

668
The connection is disconnected.

669
The parameter usage in the media. ini file is invalid.

670
The segment name cannot be read from the media. ini file.

671
The device type cannot be read from the media. ini file.

672
Unable to read device name from media. ini file.

673
The usage cannot be read from the media. ini file.

676
The line is busy (the phone is busy ).

Solution: The NIC address is lost due to a computer system failure. Change the NIC address,

677
It is a response from someone, not the modem.

678
No response.

679
Unable to detect the carrier.

680
No dial tone.

691
Access is denied because the user name and/or password in the domain are invalid.

Cause: the same as 619, the account password is incorrect, the fee expires, or the dial-up software is incorrect.

Solution: Check whether the fee expires. If not, re-enter the account and password. If the problem persists, re-create the "Broadband connection"

692
A hardware fault occurs on the port or connected device.

693
Error: Non-binary macro.

694
Error: DCB cannot be found.

695
Error status: the computer is not started.

696
Error status: The computer is started.

697
Error: The response ring is incomplete.

698
The response key name in the device. inf file does not conform to the required format.

699
The buffer overflow caused by the device response.

700
The extended commands in the device. inf file are too long.

701
The device uses the BPS frequency not supported by the COM driver.

702
The device response was accidentally received.

703
Incorrect interaction mode.

704
Error: the callback number is incorrect.

705
Error: the authentication status is invalid.

707
X.25 diagnostic indication.

708
This account has expired.

709
An error occurred while changing the password in the domain.

710
Serial overflow error detected when communicating with your modem.

711
RASMAN initialization failed. Check the event log.

713
No active ISDN line is available.

716
The remote access IP address cannot be configured.

717
There is no available IP address in the static remote access IP address pool.

718
PPP timeout. (ISP network operator server fault)

720
No PPP control protocol is configured. (Customer computer problems)

Problem: the dial-up network cannot coordinate server protocol settings in the Network
Cause: the adsl isp Server is faulty. An abnormal shutdown may cause a network protocol error.
Solution: delete all network components and reinstall the network.

721
The Remote PPP peer does not respond.

722
The PPP data packet is invalid.

723
The phone number with the prefix and suffix is too long.

726
The IPX protocol cannot be used to dial out multiple ports at the same time.

728
The IP adapter bound to the remote access cannot be found.

729
Slip cannot be used unless the IP protocol is installed.

730
The computer registration is incomplete.

731
No protocol is configured.

732
PPP negotiation has not been aggregated.

733
The PPP control protocol for this network protocol is unavailable on this server.

734
The PPP Connection Control Protocol has been terminated (client computer problems ).

Problem: the PPP Connection Control Protocol is suspended.
Cause: the adsl isp Server is faulty. An abnormal shutdown may cause a network protocol error.
Solution: delete all network components and reinstall the network.

735
The server rejects the request address.

736
The remote computer terminates the control protocol.

737
A loop is detected.

738
No address is assigned to the server.

Problem: the server cannot assign an IP address
Cause: the adsl isp Server is faulty. Too many ADSL users exceed the IP addresses that the ISP can provide.
Solution: reallocation of network segments

739
The remote server cannot use the password encrypted by Windows NT.

740
The TAPI device configured for remote access fails to be initialized or is not correctly installed.

741
The local computer does not support encryption.

742
The remote server does not support encryption.

749
Incorrect phone number

752
A syntax error occurs during script execution.

753
The connection cannot be interrupted because it is created by a multi-protocol router.

754
The system cannot find multiple link bindings.

755
Because this project already has a custom dialing program, the system cannot perform automatic dialing.

756
The connection has been set.

757
The remote access service cannot be started automatically. Check the event log for details.

764
The smart card reader is not installed.

765
Unable to start Internet Connection Sharing. An automatic IP address is required for a LAN connection that has been configured with an IP address.

766
The certificate cannot be found. A machine certificate, also called a computer certificate, is required to be installed using an IPsec L2TP connection.

767
Unable to start Internet Connection Sharing. The selected LAN connection as a dedicated network has more than one configured IP address. Enable Internet connection

Before sharing, use a single IP address to reconfigure the LAN connection.

768
The connection fails because the encrypted data fails to be encrypted.

769
Cannot connect to the specified target. (NIC disabled)

Cause: the NIC is disabled.

Method: local connection --> right-click --> enable (if the problem persists, the NIC is broken)

770
The remote computer rejects connection attempts.

771
Connection attempt failed because the network is busy.

772
The network hardware of the remote computer is incompatible with the type of call requests.

773
Failed to connect because the destination number is changed.

774
Connection attempt failed due to temporary failure. Please reconnect.

775
Remote Computer calls are blocked.

776
Because the remote computer enables the "Do Not Disturb" function, the call cannot be connected.

777
The connection attempt fails because the modem (or other connected devices) on the remote computer fails.

778
The server identity cannot be verified.

779
If you use this connection to dial out, you must use a smart card.

780
The tried function is invalid on this connection.

782
Internet Connection Sharing (ICS) and Internet Connection Firewall (ICF) cannot be enabled because Routing and Remote Access are enabled on this computer. Yes

To enable ICS or ICF, first disable Routing and Remote Access. For more information about Routing and Remote Access, ICS or ICF, see Help and Support

.

783
Unable to start Internet Connection Sharing. The selected LAN connection as a private network does not exist or is not connected to the network. Enable Internet

Make sure that the LAN Nic is connected before the shared connection.

784
You cannot use this connection to dial when logging on, because it is configured to use a user name different from the name on the smart card. If you want to use it during logon,

You must configure it as the user name on the smart card.

785
You cannot use this connection to dial when logging on because it is not configured with a smart card. If you want to use it during login, you must edit the connection property

Use a smart card.

786
L2TP connection attempt failed because there is no valid machine certificate on your computer for security authentication.

787
The L2TP connection attempt fails because the security layer cannot authenticate the remote computer.

 

788
An L2TP connection attempt fails because the security layer cannot negotiate compatible parameters with remote computers.

 

789
An L2TP connection attempt failed because the security layer encountered a processing error during initialization and remote computer negotiation.

 

790
An L2TP connection attempt failed because certificate verification on a remote computer failed.

791
L2TP connection attempt failed because the security policy for this connection cannot be found.

792
L2TP connection attempt failed because security negotiation times out.

793
L2TP connection attempt failed because an error occurred during security negotiation.

794
The radius attribute of this user's frame protocol is not PPP.

795
The radius attribute of this user's tunneling type is incorrect.

796
This user's service type radius attribute is neither a frame nor a callback frame.

797
You cannot establish a connection to a remote computer because the modem cannot be found,

Problem: No ADSL modem (switch) connection device found
Cause: the power supply of the ADSL modem (switch) is not turned on, and the connection line between the nic and the adsl modem (switch) is faulty. After the software is installed, the corresponding protocol is not properly bound. When a dial-up connection is created, an invalid null connection is established.
Solution 1: Check the power supply and connection lines, check the network properties, and check whether the raspppoe-related protocols are correctly installed and properly bound (related Protocols), and check whether the network adapter is
? No. Or! To enable the connection. Check whether the connected device uses an "ISDN channel-adapter name (XX)" setting.
This device is an empty device. If you cancel it, select the correct pppoe device to replace it, or recreate a dial-up connection.

Solution: The system Nic is disabled at and can be recovered after being enabled.

 

798
No certificate can be found for scalable authentication protocols.

799
Internet Connection Sharing (ICS) cannot be enabled due to an IP address conflict ). ICS requires that the host be configured with 192.168.0.1. Confirm the network

No other client is configured with 192.168.0.1.

800
You cannot establish a VPN connection. The VPN Server may not be accessible, or the security parameters of the connection are not correctly configured.

801
This connection is configured to verify the identity of the access server, but Windows cannot verify the digital certificate sent by the server.

802
The provided card cannot be identified. Check whether the card is correctly inserted and whether it is tightly inserted.

803
The PEAP configuration saved in the session cookie does not match the current session configuration.

804
The peap id in the session cookie does not match the current ID.

805
You cannot use this connection to dial when logging on because it is configured with the user ID card after logon.

806
The connection between the computer and the VPN Server has been started, but the VPN connection cannot be completed. The most common cause of this problem is that at least one Internet device (such as a firewall or router) between your computer and the VPN Server is not configured to allow the GRE protocol package. If the problem persists

However, contact your network administrator or Internet service provider.

807
The network connection between the computer and the VPN Server is interrupted. This may be caused by problems encountered during VPN transmission, usually due to Internet latency.

Or only the result that the VPN Server has reached the capacity limit. Try again to connect to the VPN Server. If the problem persists, contact the VPN administrator.

System and analyze the quality of network connections.

808
The network connection between the computer and the VPN Server cannot be established because the remote server rejects the connection. This is usually because the server configuration and connection settings are not

Matched. Contact the remote server administrator to verify the server configuration and connection settings.

809
The network connection between the computer and the VPN Server cannot be established because the remote server does not respond. This may be because the computer and remote server are not

To allow VPN connections. Contact the administrator or service provider to determine which device is possible.

This problem occurs.

810
The network connection between the computer and the VPN Server has been started, but the VPN connection is not completed. This is usually caused by incorrect or expired certificates.

Authentication between the client and the server. Contact the Administrator to ensure that the certificate used for authentication is valid.

811
The network connection between the computer and the VPN Server cannot be established because the remote server does not respond. This is usually caused by pre-sharing between the client and the server.

Key Issue. The pre-shared key is used to ensure your identity in the IP Security Settings (IPSec) communication cycle. Ask the Administrator for help to confirm

Determine where the pre-shared key problem comes from.

812
The connection is blocked due to a policy configured on the RAS/VPN Server. In particular, the authentication method used by the server to verify the user name and password may be

The authentication method configured in the connection configuration file does not match. Contact the administrator of the RAS server and notify them of this error.

813
When the previous broadband connection is established, you try to establish another broadband connection using the same device or port. Please disconnect the previous connection and then try again

Establish a connection.

814
The basic Ethernet connection required for the broadband connection is not found. Before trying this connection, install and enable Ethernet adapter on your computer through the network connection folder

.

815
You cannot establish a broadband network connection on your computer because the remote server does not respond. This may be because the "service name" field value of this connection is invalid. Please

Contact the Internet service provider to obtain the correct value of this field and update it in Connection Properties.

816
The remote access service no longer supports the features or settings you are trying to enable.

817
A connection cannot be deleted when it is in the connection status.

818
Network access protection (NAP) forces the client to fail to create system resources for remote access connections. Some network services or resources may be unavailable. If the problem persists

, Disconnect, retry the Remote Access Connection, or contact the administrator of the remote access server.

819
The network access protection proxy (napagent) service is disabled or not installed on this computer. Some network services or resources may be unavailable. If the problem persists

, Disconnect, retry the Remote Access Connection, or contact the administrator of the remote access server.

820
Network access protection (NAP) forces clients to be unable to register the network access protection proxy (napagent) service. Some network services or resources may be unavailable. For example

If the problem persists, disconnect the connection, retry the Remote Access Connection, or contact the administrator of the remote access server.

821
Network access protection (NAP) forces the client to fail to process requests because the Remote Access Connection does not exist. Try the Remote Access Connection again. If the problem persists,

Make sure that you can connect to the Internet and then contact the administrator who remotely accesses the server.

822
Network access protection (NAP) forces the client to have no response. Some network services or resources may be unavailable. If the problem persists, disconnect and try again.

Access the connection, or contact the administrator who remotely accesses the server.

823
The received encrypted binding TLV is invalid.

824
The encrypted binding TLV is not received.

825
Point-to-Point Tunneling Protocol (PPTP) is incompatible with IPv6. Change the VPC type to L2 Tunneling Protocol (L2TP)

826
Eaptls verification for cached creden。 failed. Discard cache creden.

827
The L2TP/IPSec connection cannot be completed because Ike and authip IPSec key module services and/or basic filter engine services are not running. To create

The above services are required for L2TP/IPSec connections. Make sure these services are enabled before dialing connections.