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Windows DUN/RAS Error Number 678

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Windows Vista Solution List

• Delete the username and password, making certain to press backspace and delete several times to remove any possible spaces that you were unable to see. Verify that you have both the correct username and password. Once you have verified these, retype your username and password, making certain to type them in the correct case.
• Make certain that all of your cables are secure and try powercycling your DSL modem. If the modem is able to Synchronize then try connecting again. If the modem does not Synchronize after about 1-2 minutes check all of your connections and filters. It would not be a bad idea to unplug them and replug them in, then powercycle your modem once this has been completed. If your modem will still not Synchronize, check with your ISP for reported outages.
• Delete and recreate the connection.
• Make certain your ISP is not experiencing an outage.
• If the computer has more than one LAN Connection in network connections disbale the ones that aren't needed. This applies for wireless as well. Reboot after doing so and try again.
• Are you using USB? If so, try connecting your modem to a different USB port on your computer, restart your computer, and powercycle your modem. This could be related to a faulty USB port. If this does not resolve the issue, try using another USB device to verify that your USB port is functioning.
• Did you recently install or make changes to a Firewall? Make certain you have the disc/files to reinstall the Firewall and uninstall the Firewall. If your connection is able to function after uninstalling the Firewall, try reinstalling it. If it ceases to function again, contact the Firewall vendor.
• Make certain the Network Interface Card is installed properly. If it appears to be installed and working, open a command prompt and type "route print" without the quotes. If "route print" results in 6 lines, then your NIC is likely functioning properly, but has no IP. If "route print" results in 7 lines, then your NIC is likely functioning properly and has an IP. If you receive less than 6 lines from "route print" then check your cables. You may need to reinstall the Network Interface Card or purchase a new one if the current is defective.
• Scan the computer for viruses and spyware.
• You may want to try a system restore point to a time when the connection was still working.
• Know a solution that is not listed? Please let us know about it by using the information located below.

Windows XP Solution List

• Make certain that all of your cables are secure and try powercycling your DSL modem. If the modem is able to Synchronize then try connecting again. If the modem does not Synchronize after about 1-2 minutes check all of your connections and filters. It would not be a bad idea to unplug them and replug them in, then powercycle your modem once this has been completed. If your modem will still not Synchronize, check with your ISP for reported outages.
• Run "netsh interface ip reset log.txt" without the quotation marks from a command line. Restart your computer and connecting again.
• Delete the username and password, making certain to press backspace and delete several times to remove any possible spaces that you were unable to see. Verify that you have both the correct username and password. Once you have verified these, retype your username and password, making certain to type them in the correct case.
• Delete and recreate the connection.
• Make certain your ISP is not experiencing an outage.
• If the computer has more than one LAN Connection in network connections disbale the ones that aren't needed. This applies for wireless as well. Reboot after doing so and try again.
• Are you using USB? If so, try connecting your modem to a different USB port on your computer, restart your computer, and powercycle your modem. This could be related to a faulty USB port. If this does not resolve the issue, try using another USB device to verify that your USB port is functioning.
• Did you recently install or make changes to a Firewall? Make certain you have the disc/files to reinstall the Firewall and uninstall the Firewall. If your connection is able to function after uninstalling the Firewall, try reinstalling it. If it ceases to function again, contact the Firewall vendor.
• Make certain the Network Interface Card is installed properly. If it appears to be installed and working, open a command prompt and type "route print" without the quotes. If "route print" results in 6 lines, then your NIC is likely functioning properly, but has no IP. If "route print" results in 7 lines, then your NIC is likely functioning properly and has an IP. If you receive less than 6 lines from "route print" then check your cables. You may need to reinstall the Network Interface Card or purchase a new one if the current is defective.
• Scan the computer for viruses and spyware.
• You may want to try a system restore point to a time when the connection was still working.
• Know a solution that is not listed? Please let us know about it by using the information located below.

Windows 2000 Solution List

• Delete the username and password, making certain to press backspace and delete several times to remove any possible spaces that you were unable to see. Verify that you have both the correct username and password. Once you have verified these, retype your username and password, making certain to type them in the correct case.
• Make certain that all of your cables are secure and try powercycling your DSL modem. If the modem is able to Synchronize then try connecting again. If the modem does not Synchronize after about 1-2 minutes check all of your connections and filters. It would not be a bad idea to unplug them and replug them in, then powercycle your modem once this has been completed. If your modem will still not Synchronize, check with your ISP for reported outages.
• Delete and recreate the connection.
• Make certain your ISP is not experiencing an outage.
• If the computer has more than one LAN Connection in network connections disbale the ones that aren't needed. This applies for wireless as well. Reboot after doing so and try again.
• Are you using USB? If so, try connecting your modem to a different USB port on your computer, restart your computer, and powercycle your modem. This could be related to a faulty USB port. If this does not resolve the issue, try using another USB device to verify that your USB port is functioning.
• Did you recently install or make changes to a Firewall? Make certain you have the disc/files to reinstall the Firewall and uninstall the Firewall. If your connection is able to function after uninstalling the Firewall, try reinstalling it. If it ceases to function again, contact the Firewall vendor.
• Are you using 3rd party PPPoE software? If so, make certain you have the latest version of this software.
• Are you using 3rd party PPPoE software? If so, and you have the latest version of that software, try reinstalling the software. Make certain you have your Windows CD or CAB files in case they are required.
• Make certain the Network Interface Card is installed properly. If it appears to be installed and working, open a command prompt and type "route print" without the quotes. If "route print" results in 6 lines, then your NIC is likely functioning properly, but has no IP. If "route print" results in 7 lines, then your NIC is likely functioning properly and has an IP. If you receive less than 6 lines from "route print" then check your cables. You may need to reinstall the Network Interface Card or purchase a new one if the current is defective.
• Scan the computer for viruses and spyware.
• Know a solution that is not listed? Please let us know about it by using the information located below.

Windows ME Solution List

• Delete the username and password, making certain to press backspace and delete several times to remove any possible spaces that you were unable to see. Verify that you have both the correct username and password. Once you have verified these, retype your username and password, making certain to type them in the correct case.
• Make certain that all of your cables are secure and try powercycling your DSL modem. If the modem is able to Synchronize then try connecting again. If the modem does not Synchronize after about 1-2 minutes check all of your connections and filters. It would not be a bad idea to unplug them and replug them in, then powercycle your modem once this has been completed. If your modem will still not Synchronize, check with your ISP for reported outages.
• Delete and recreate the connection.
• Make certain your ISP is not experiencing an outage.
• Are you using USB? If so, try connecting your modem to a different USB port on your computer, restart your computer, and powercycle your modem. This could be related to a faulty USB port. If this does not resolve the issue, try using another USB device to verify that your USB port is functioning.
• Did you recently install or make changes to a Firewall? Make certain you have the disc/files to reinstall the Firewall and uninstall the Firewall. If your connection is able to function after uninstalling the Firewall, try reinstalling it. If it ceases to function again, contact the Firewall vendor.
• Are you using 3rd party PPPoE software? If so, make certain you have the latest version of this software.
• Are you using 3rd party PPPoE software? If so, and you have the latest version of that software, try reinstalling the software. Make certain you have your Windows CD or CAB files in case they are required.
• Make certain the Network Interface Card is installed properly. If it appears to be installed and working, open a command prompt and type "route print" without the quotes. If "route print" results in 6 lines, then your NIC is likely functioning properly, but has no IP. If "route print" results in 7 lines, then your NIC is likely functioning properly and has an IP. If you receive less than 6 lines from "route print" then check your cables. You may need to reinstall the Network Interface Card or purchase a new one if the current is defective.
• You may want to try a system restore point to a time when the connection was still working.
• Scan the computer for viruses and spyware.
• Know a solution that is not listed? Please let us know about it by using the information located below.

Windows 98 Solution List

• Delete the username and password, making certain to press backspace and delete several times to remove any possible spaces that you were unable to see. Verify that you have both the correct username and password. Once you have verified these, retype your username and password, making certain to type them in the correct case.
• Make certain that all of your cables are secure and try powercycling your DSL modem. If the modem is able to Synchronize then try connecting again. If the modem does not Synchronize after about 1-2 minutes check all of your connections and filters. It would not be a bad idea to unplug them and replug them in, then powercycle your modem once this has been completed. If your modem will still not Synchronize, check with your ISP for reported outages.
• Delete and recreate the connection.
• Make certain your ISP is not experiencing an outage.
• Are you using USB? If so, try connecting your modem to a different USB port on your computer, restart your computer, and powercycle your modem. This could be related to a faulty USB port. If this does not resolve the issue, try using another USB device to verify that your USB port is functioning.
• Did you recently install or make changes to a Firewall? Make certain you have the disc/files to reinstall the Firewall and uninstall the Firewall. If your connection is able to function after uninstalling the Firewall, try reinstalling it. If it ceases to function again, contact the Firewall vendor.
• Are you using 3rd party PPPoE software? If so, make certain you have the latest version of this software.
• Are you using 3rd party PPPoE software? If so, and you have the latest version of that software, try reinstalling the software. Make certain you have your Windows CD or CAB files in case they are required.
• Make certain the Network Interface Card is installed properly. If it appears to be installed and working, open a command prompt and type "route print" without the quotes. If "route print" results in 6 lines, then your NIC is likely functioning properly, but has no IP. If "route print" results in 7 lines, then your NIC is likely functioning properly and has an IP. If you receive less than 6 lines from "route print" then check your cables. You may need to reinstall the Network Interface Card or purchase a new one if the current is defective.
• Scan the computer for viruses and spyware.
• Know a solution that is not listed? Please let us know about it by using the information located below.

Windows 95 Solution List

• Delete the username and password, making certain to press backspace and delete several times to remove any possible spaces that you were unable to see. Verify that you have both the correct username and password. Once you have verified these, retype your username and password, making certain to type them in the correct case.
• Make certain that all of your cables are secure and try powercycling your DSL modem. If the modem is able to Synchronize then try connecting again. If the modem does not Synchronize after about 1-2 minutes check all of your connections and filters. It would not be a bad idea to unplug them and replug them in, then powercycle your modem once this has been completed. If your modem will still not Synchronize, check with your ISP for reported outages.
• Delete and recreate the connection.
• Make certain your ISP is not experiencing an outage.
• Are you using USB? If so, try connecting your modem to a different USB port on your computer, restart your computer, and powercycle your modem. This could be related to a faulty USB port. If this does not resolve the issue, try using another USB device to verify that your USB port is functioning.
• Did you recently install or make changes to a Firewall? Make certain you have the disc/files to reinstall the Firewall and uninstall the Firewall. If your connection is able to function after uninstalling the Firewall, try reinstalling it. If it ceases to function again, contact the Firewall vendor.
• Are you using 3rd party PPPoE software? If so, make certain you have the latest version of this software.
• Are you using 3rd party PPPoE software? If so, and you have the latest version of that software, try reinstalling the software. Make certain you have your Windows CD or CAB files in case they are required. Make certain you also have the Dial-Up Networking 1.3 or 1.4 Upgrade when doing this so that you can reinstall this upgrade as well.
• Make certain the Network Interface Card is installed properly. If it appears to be installed and working, open a command prompt and type "route print" without the quotes. If "route print" results in 6 lines, then your NIC is likely functioning properly, but has no IP. If "route print" results in 7 lines, then your NIC is likely functioning properly and has an IP. If you receive less than 6 lines from "route print" then check your cables. You may need to reinstall the Network Interface Card or purchase a new one if the current is defective.
• Scan the computer for viruses and spyware.
• Know a solution that is not listed? Please let us know about it by using the information located below.

Windows NT Solution List

• When connecting, make certain nothing is entered in the "Domain" field if nothing should be entered there.
• Delete the username and password, making certain to press backspace and delete several times to remove any possible spaces that you were unable to see. Verify that you have both the correct username and password. Once you have verified these, retype your username and password, making certain to type them in the correct case.
• Make certain that all of your cables are secure and try powercycling your DSL modem. If the modem is able to Synchronize then try connecting again. If the modem does not Synchronize after about 1-2 minutes check all of your connections and filters. It would not be a bad idea to unplug them and replug them in, then powercycle your modem once this has been completed. If your modem will still not Synchronize, check with your ISP for reported outages.
• Delete and recreate the connection.
• Make certain your ISP is not experiencing an outage.
• Are you using USB? If so, try connecting your modem to a different USB port on your computer, restart your computer, and powercycle your modem. This could be related to a faulty USB port. If this does not resolve the issue, try using another USB device to verify that your USB port is functioning.
• Did you recently install or make changes to a Firewall? Make certain you have the disc/files to reinstall the Firewall and uninstall the Firewall. If your connection is able to function after uninstalling the Firewall, try reinstalling it. If it ceases to function again, contact the Firewall vendor.
• Are you using 3rd party PPPoE software? If so, make certain you have the latest version of this software.
• Are you using 3rd party PPPoE software? If so, and you have the latest version of that software, try reinstalling the software. Make certain you have your Windows CD or CAB files in case they are required.
• Make certain the Network Interface Card is installed properly. If it appears to be installed and working, open a command prompt and type "route print" without the quotes. If "route print" results in 6 lines, then your NIC is likely functioning properly, but has no IP. If "route print" results in 7 lines, then your NIC is likely functioning properly and has an IP. If you receive less than 6 lines from "route print" then check your cables. You may need to reinstall the Network Interface Card or purchase a new one if the current is defective.
• Scan the computer for viruses and spyware.
• Know a solution that is not listed? Please let us know about it by using the information located below.

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