Here are some guides for troubleshooting topics particular problems .
(1) the virtual network connection
(2) VPN error messages
(3) VPN Modems Troubleshooting Guide
(4 ) VPN ISP troubleshooting Guide.
(1) Your Virtual Private Network Connection
problems connecting to the Internet at home try these steps before you call for help.
1. Do you have an IP address? Try ipconfig / all. If you do not have an IP address, restart the PC. If this does not work power cycle the cable modem / DSL router and reboot your PC again after the network devices are high and stable. Make sure that all network cables are connected tightly.
2. After you restart your PC to verify that the network adapter is enabled and packets flow. Run the command ipconfig / all check again.
3. Check connectivity by pinging several websites. If this does not work, ping the loopback address 127.0.0.1. If that fails, the adapter may not work or is not configured properly.
To check the IP address. From the command prompt, type ipconfig / all (as shown in the picture) you should see an IP address and several DNS server addresses. The Domain Name System (DNS) is the way Internet domain names are located and translated into IP addresses and is required for surfing the Internet.
Ping 127.0.0.1 - loopback tests (as shown). The loopback test is used to check whether the IP stack responds. If the time is up, or an error occurs the problem may occur if one or more of the following conditions:
* The TCP driver damaged
* The network card does not work
* another service is interfering with IP
Check the network adapter, click the Start menu, Settings, control Panel, select network Connections. Double-click the Local Area Connection or the wireless adapter depending on which one you are using. Make sure it is connected. If you have multiple network adapters turn off what you do not you're using.
There should be no packages appear in both sent and received counters. If the counter is 0 Received check that the adapter has an IP address. Select Properties.
Click the check boxes to Show icon and Notify me of followup. Icon twin PC will appear in the lower right corner of the taskbar in the tray area, and flashes when sending and receiving packets. You can hover your mouse over the icon to get status and click on it for more details.
Tracert shows the connection path to the target location and the number of jumps. Each hop is the journey from one router. Tracert is a useful tool both to understand where the problems are in the network and to determine latency between hops.
Table is used to determine if there is a host and is active on the network and able to determine the round trip time for the device. You can enter a host name or an IP address if you know it. If the request times out then the host is not accessible because it is connected or there is a problem with the connection. Try different sites, if none of work then ping the loopback address 127.0.0.1 Also, if DNS is not working or is properly configured can ping only the host with an IP address and will not be able to surf the Internet.
If you are experiencing intermittent problems, ping -t for 5 or 6 minutes, then press CTRL C to see the test results to determine if you are dropping network packets (packet loss). If you are, this usually indicates a problem ISP or cable / DSL modem problem. See the VPN your ISP i Troubleshooting User Manual
(2) VPN error messages
[ErrorMessage Q1: remote host does not respond : or able to resolve the IP address of the remote server
Cause: This indicates that the Contivity VPN switch He has never responded to the connection attempt. The problem could be either with the Contivity switch itself, (switch can be down) or the machine may have a problem to resolve the IP address.
Action: pinging the name of the destination (example: VPN.something.com). If you received a message that says "Request timed out" by the ping command, contact your Internet service provider to make sure that their DNS is working properly.
Q2 Error Message: The maximum number of sessions reached
Cause: This indicates that the maximum number of users for the account in use are currently connected.
Action: If you are the only user with VPN to your account, you can get this error if you restart a connection right away after losing the remote connection to the service provider. This is because the Contivity VPN switch takes up to an hour to determine that the connection is dropped, and you disconnect from your account.
Q3 Error message: Login failed, Please consult the switch log for more information
Cause: the user name or password is incorrect for the username you entered.
Action: Make sure the username you entered is correct and re-enter the password before retrying the connection.
Message Error Q4: The physical connection has been lost
Cause: The connection to the service provider has been disconnected.
Action: Re-establish the connection to your Internet service provider before attempting to restore the Contivity connection to the remote network.
Message error Q5: The secure Contivity connection was lost
This message can lead due to a number of different reasons, and there are several recommended actions that you can take to try to re-connect.
Cause (s):
If you receive this error before the client connects then something is blocking a necessary port (such as the ESP port 50). This can result if the firewall is not configured properly and limits the port (s) required.
If you receive this error during the connection and suddenly the error can mean one of the following options:
1. Something has closed the connection;
2. The Contivity VPN switch where you were trying to connect to your client thought it was down or expired;
3. Your local ISP did something that disrupted the network connection long enough for the Contivity VPN switch to identify the customer did not answer;
4. The Contivity VPN switch that you are connected to is logged off your connection or the switch no longer responds, or a device that does not support IPSec NAT Traversal is the cause of connection failure .
Action (s):
1. Try to restore the Contivity connection by clicking the Connect button. If it works, the connection is probably lost because of the idle timeout configured on the Contivity VPN switch. If data is transferred not through the Contivity connection for a long period of time, 15 minutes or more, the Contivity VPN switch automatically disconnects the connection;
2. If you are unable to successfully restore the Contivity connection, dial-up can prevent the data to travel between the customer and Contivity VPN switch Contivity VPN. Stop dial-up connection and reconnect before groped to re-establish a connection to the Contivity VPN switches;
3. If you are still unable to connect to the switch Contivity VPN, open a command prompt and try to ping switch Contivity VPN using the host name or address specified in the Target field.
(A) If you receive an "error of Destination Unreachable" there is a routing problem at your ISP.
(B) If you receive an error message "Request timed out", the Contivity VPN Switch is probably not available, and you should contact your network administrator.
4. If it keeps getting this message and you can not connect, then it could indicate that the Contivity VPN switch is unable to communicate with the customer, because it is behind some kind of NAT (Network Address Translation). NAT (Network Address Translation) traversal allows a number of devices on a private network to access the Internet simultaneously without each requiring its own external IP address. Most of the hotels and airports that provide Internet connectivity to use NAT to connect to the Internet.
Message error Q6: You can not change Routing Table
Cause: The message indicates is that the user, an application on your computer, or your ISP attempted to change the routing table via an ICMP redirect attempt and was not successful. The client detects the attempt to make the change, determines is a security breach and closes the client connection. Every time you make a VPN connection, you can not change the routing table, because the VPN client sees this as a security risk and you will get disconnected.
Some applications require an ICMP redirect in order to work as a game or other third-party software.
Action: If you receive this error and you can not connect because of an ICMP redirect attempt, close all other applications in use, which can be the cause of ICMP redirect attempt. If your ISP is doing that, you will need to block the ICMP redirect request. You can identify that occurred ICMP Redirect, seeing a message that there has been a change in the IP routing table.
Q7 Error Message: Text banner Receiving Information
Cause: Message means that you are experiencing a sock flag issue, and will see a window showing " receiving text banner "message and then disconnects.
Actions:
1. disable the firewall completely to test. This is a problem leads 500 and often means that you have a personal firewall that is blocking port 500 or if you have a router that does not support IPSEC pass-through, and you connect to a VPN switch that does not have NAT traversal enabled.
2. If you are using wireless, temporarily remove the picture and focus on the Wireless Ethernet Adapter. Control the speed of the Ethernet card and duplex parameters and then make sure the hub, switch or router that is on the other side has the same parameters. Otherwise, the VPN connection will drop as the link goes up and down, or due to a large number of errors at the door by a speed or duplex mismatch.
3. Firewall blocking the connection, so that the system will crash. (This rarely happens) NSDF (Norton Symantec Desktop Firewall) and NSPF (Symantec's Norton Personal Firewall) can do this, though, if you do not trust the IP address of the VPN connection.
If you do not trust the VPN address of the VPN client, the firewall cause the crash. In the Internet browser, click "Tools> Internet Options> Security> Trusted Sites> Sites" and add the VPN destination address (es) for trusted sites.
Message Q8 error: Already have maximum number of installed adapters
Cause: Could be installed to many virtual adapters in your IP stack
actions :
1. Remove any unnecessary adapters;
2. Create multiple boot scenarios disabling any adapters that are not required for this function;
3. You can also get Banner Sock errors on Win 95 and 98 units with this condition;
4. For more information, see this Microsoft article: KB217744: Wire protocols unable for more than 5 network cards (copy and paste into the search toolbar> Enter).
Q9 update errors: Below are some errors that can occur when you try to update / install the Nortel VPN Client 4.65
Error (1) : Unable to get registry key value for NT_IPSECSHM
cause: This is caused because an important registry key which can not be found in the registry.
Actions:
1. Uninstall and reinstall the VPN software
Error (2): failure to access: lack of driver
Cause: These are generally caused by not having administrator rights to the PC or trying to install / use a Nortel VPN client before the operating system.
Actions:
1. Make sure you have administrator rights on the PC.
2. update / install the latest version of the Nortel VPN client.
Error (3): Create socket failed with 10048.
Cause: This problem usually occurs whenever you have another VPN client software installed on the system. The more well-known conflict clients are: AOL, Cisco client (s) VPN, SSH Sentinel and PGP.
Actions:
1. Removing these clients will in most cases, to solve the problem.
(3) VPN Modems Troubleshooting Guide
Q1 are supported via cable modems for access VPN ?
Yes, you can use cable modems for access VPN. However you should be aware of these conditions and be able to work in them:
* Some cable modems require that you log into an NT network to obtain authentication.
* Some cable modems use a client like the Client Extranet VPN and both will not run at the same time.
* Some cable Contracts / acceptable usage policies specify that the modem can not be used for commercial purposes or who want to charge another fee to use them for commercial purposes. Be sure to read the contract carefully.
* The cable modem provider is your ISP. Please refer to the VPN-connection-guide.html "> ISP Troubleshooting Guide problems for more information.
Q2 Why does my modem seem to run irregularly?
always make sure that you do not let the operating system select a generic modem. If necessary, go to the appropriate web site for your modem manufacturer and obtain the updated INF files so that the correct parameters are configured for the modem.
Q3 Why do I always seem to get a speed of slower connection than others with the same modem?
1. always check your modem configuration to verify that was selected its top speed.
2. 'common when the auto-installation of modems that the maximum speed is not automatically selected.
3. do not check the box that says, operate at only maximum speed.
Q4 I plugged my modem to the phone line at the hotel or office customers, and now does not work.
always make sure that the phone line to connect to when you visit somewhere is an analog line is not a digital one. Inserting in a digital line can permanently damage the modem, which requires a replacement drive. To avoid these situations please contact your local site support staff.
Q5 Why can not I get a 56Kb V.0 connection from various locations that I go to?
Here are some of the reasons why you might not achieve a 56K:
connection 1. There is more than 3 ½ miles from the phone company's central office (CO).
2. A SLICK or per subscriber circuit is used in your area.
3. you are calling from a digital PBX system, which creates a conversion from digital to analog and then an analog-to-digital conversion.
4. The line includes digital pads or Robbed bit signaling (RBS), which can degrade your connection speed.
5. The wiring may be of poor quality. Firmware
6. The modem may not be up-to-date. Check if the modem has the latest V.0 code installed with all patches from the vendor's web site.
Q6 Why do not I get higher speed my 56K V.0 modem in some NAG?
Here are some possible reasons:
1. A 56k V.0 modem is asymmetrical drawing in which the download speed can be up to 56k but upload speed will be up to 33.6bps . For 56k to work, there must be only one analog-to-digital converter (A / D) conversion in the local telephone loop. Thus, when the modems at both ends are analog, 56k costs will never be achieved as most of the PSTN exchanges run digital routing between the exchanges.
2. Some NAG sites use analog phone lines with Cisco and standard 56k modem, and dial-up most of the PC uses a similar modem. Between the two modems, it limits the download speed at about 33.6 kbps max.
3. In addition, many users may experience connection speed lower due to other reasons, such as the poor quality of the line. These factors also contribute to the quality and speed of the line.
(4) VPN ISP Troubleshooting Guide
Q1 If you are getting the message " Unable to resolve the IP address of the remote server. Test the host name in the destination field is correct. " When you are trying to connect with the client extranet.
pinging the destination name (example: VPN.something.com) and if it fails, call your ISP to make sure that their DNS is working properly.
Q2 Why do I get no domain Available during dialing my ISP?
on the Internet Service Provider (ISP) dial connection. Click the right mouse and select the Properties button. Click on the Server Type tab and make sure that the Log on to box network is not selected.
Q3 Why do I seem to be running slowly through my VPN connection?
Try disabling the software compression option on your Internet Service Provider (ISP) dial connection as the VPN client has its own compression. Click the right mouse and select the Properties button. Click on the Server Type tab and uncheck the
Q4 I keep getting busy signals when trying to connect to my ISP, what should I do?
, contact your Internet service provider giving the numbers you are trying to connect. Many times you will find that you can give an alternative number not yet published that will work well. Otherwise you may need to find another ISP that provides better service.
Q5 When you configure the select icon for my ISP what should I put in the DNS / WINS settings?
Your ISP should provide you with the DNS / settings of the dial-WINS. Most only give you DNS, in this case, just leave empty WINS settings.
Q6 Why when you load the client extranet on my PC and Winpoet is installed on my computer freezes or does not work properly?
There are problems with Winpoet software on the PC with the Client Nortel Extranet (VPN).
to restore the system, boot into Safe Mode and uninstall the software Winpoet.
A simple solution is to install the hardware router Linksys BEFSR41. It has a firmware PPPOE connector, which eliminates Winpoet from the PC and provides the advantage of a NAT firewall with the ability to connect to three other PCs.
A second option is to find a PPPoE client that does not interfere with the VPN client.
See pleasure medical of VPN for the image and more details Guide.
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