Your doctor for VPN Virtual Private Network Troubleshooting VPN Guide
Here are some troubleshooting guides for specific topics.
(1) Your Virtual Network Connection
(2) VPN Troubleshooting Error Messages
(3) modems, VPN Troubleshooting Guide
(4) VPN ISP Troubleshooting Guide.
(1) Your Virtual Private Network Connection
Problems Connecting to the Internet at home, try these steps before calling for help.
1. Do you have an IP address? Try ipconfig / all. If you do not have aIP address of the computer to restart. If that doesn't work Turn on your cable / DSL modem and router and restart your PC again after the network devices and are stable. Make sure all your network cables are plugged tight.
2. After restarting your computer will check whether your network card is active and packets are flowing. Do check the ipconfig / all again.
3. Check your connection by using ping multiple Web pages. If that does not work, ping the loopback address 127.0.0.1. If that fails,My adapter can not work or is not configured correctly.
To check the IP address. From the command prompt type ipconfig / all "(as shown in the picture), you should use one IP address and see more DNS server addresses. The Domain Name System (DNS) is the way that Internet domain names are located and translated into IP addresses and is required for surfing the internet.
Ping 127.0.0.1 - loopback test (as shown in the picture). The loopback test will determine whether the IP stackresponding. If it run out or you get an error the problem may occur if one or more of the following conditions is met:
* The TCP drivers are corrupted
* The network adapter does not work
* Another service is using IP
Check the network adapter, click on the Start menu, Settings, Control Panel and select Network Connections. Double-click the LAN connection or a wireless adapter which you use. Make sure its Connected. If youTo disable multiple network cards, you do not need.
It should appear in two packages sent and received counters. If the counter 0 Received verify that the adapter an IP address. Select "Properties".
Click on the icon and check box Notify me down. A group with two PC icon on the lower right part of the taskbar in the notification area appears and flashes when sending or receiving packets. You can place your mouse over the icon to the status and clickit comes to details.
Tracert shows the connection path to the destination and the number of jumps. Each hop is the trip from one router to another. Tracert is a handy tool both for understanding where problems on the network and for determining latency between hops.
Ping is used to determine whether a computer is available and the network is active and can the Round Trip Time in order to identify the device. You can enter a host name or IP address if you know them. If the requestTimes that of the host is not reachable, because it is offline or there is a problem with the connection. Try more than one page, if not working, then ping the loopback address 127.0.0.1 does not work or even if DNS is configured correctly, you can only host with an IP address, ping and you will not be able to on the Internet Surf.
If you are a temporary problem, perform a ping-t for 5 to 6 minutes, then press CTRL + C to the results of the tests, see if you are on the declineNetwork packets (lost packets). If you are, this usually to an ISP problem or a cable / DSL modem problem. See VPN ISP Troubleshooting Guide
(2) VPN Troubleshooting Error Messages
Q1 error: Remote host not responding: Can or resolve the IP address of the remote server
Cause: This indicates that the Contivity VPN Switch responds rejected the connection. The problem could either be with the Contivity switches to(Switch down) can be a problem or your computer can resolve the IP address.
Action: Try your destination name (Example: VPN. Something.com). If you receive a message that says "Request timed out" from the ping command, call your ISP to ensure that their DNS is working properly.
Q2 error: Maximum number of sessions reached
Cause: This indicates that the maximum number of users are registered to the account you are using currentlyon.
Action: If you are the only user with VPN on your account, it is possible that error when you connect again immediately after the loss of dial-up connection to your ISP. This is because the Contivity VPN Switch is up to an hour to determine that your connection has been dropped, and then log out of your account.
Q3 shows error: Login error, please see the switch log for more details
Cause: The user name or passwordis for the user name incorrectly.
Action: Verify that the user name correctly typed and enter the password again before you connect again.
Q4 error: The physical connection is broken
Cause: The connection to your ISP was disconnected.
Action: Re-establish your connection to your ISP before you again to the Contivity connection to the remote network.
Q5 error: The secure Contivity connection has beenlost
This message can result due to a number of other reasons, and there are several recommended actions you take to try to reestablish the connection.
Cause (s):
If you receive this error message before the client then connects to anything is blocking a necessary port (such as ESP-port 50). This may result if your firewall is not configured properly and that the restriction of the necessary port (s).
If you receive this error during a connection, and then suddenly the error is a meanthe following characteristics:
1. Something the connection is closed;
2. The VPN Contivity switch to where you have tried to connect to your customers were thinking down or timed out;
3. Your local ISP was doing something that your network connection was interrupted long enough for the Contivity VPN Switch identify your customer is not responding;
4. The VPN Contivity switch that you are connected, either has logged off your connection or the switch is not respondingor a device that does not support IPSec NAT traversal causes the connection failed.
Action (s):
1. Try to restore the Contivity connection by clicking the Connect button. If this works, the connection was lost, probably because of the idle timeout configured on the Contivity VPN Switch. If no data is transferred through the Contivity connection for a long time, 15 minutes or more, the Contivity VPN Switch automatically switches the Connection;
2. If you can not successfully restore the Contivity connection, dial-up connection may prevent data from traveling between the Contivity VPN Client and the Contivity VPN Switch. Set the dial-up connection and close before you try again to connect to the Contivity VPN Switch;
3. If you do not connect to the Contivity VPN switch, open a command prompt and try pinging the Contivity> VPN Switch using the host name or address that you specified in the Target box.
(a) If you have a "destination unreachable error:" There is a routing problem at your ISP.
(b) If you receive a "timed out" the Contivity VPN Switch is probably not available, and you should contact your network administrator.
4. If you keep this message and do not occur in conjunction, then, may indicate that the Contivity VPN Switchnot being able to communicate with the customer, because they behind this type of NAT (Network Address Translation) device. NAT (Network Address Translation) Traversal allows a number of devices on a private network to the Internet without simultaneously each with its own external IP access address. Most hotels and airports, Internet connectivity, NAT use, which connect to the Internet.
Q6 error: Can not Alter routing table
Cause: The message is that you the user toApplication on your computer or your Internet service provider is trying to change the routing table via an ICMP redirect attempt, and it was not successful. The client detects the attempt to make the change, it is certainly a security issue and leaves the client connection. Each time you establish a VPN connection, you can not change the routing table because the VPN client these views as a security risk and you will get disconnected.
Some applications require an ICMP redirect toWork like a game or other third party software.
Action: If you receive this error message and cannot get in touch by an ICMP redirect attempt to close all other applications you use that can be caused by the ICMP redirect attempt. If the ISP is that it does, you need to block the ICMP redirect request. You can identify these occurred ICMP Redirect to by posting a message that there is an IP address routing table is changing.
Q7 error message: Receiving Text BannerInformation
Cause: The message means that you will experience a banner issue Sock, and is a window with the "see Receiving banner text" message, and then adjourned.
Actions:
1. Disable the firewall completely to test. This is a question of port 500, and often means that you have a personal firewall, port 500 blocked, or you have a router that does not support IPSec pass-through, and you connect to a VPN switch that does not have NAT Traversalactivated.
2. When using wireless, wireless temporarily removed from the picture and focus on the Ethernet card. Check the Ethernet card speed and duplex parameters and make sure that is the hub, switch or router that is at the other end, the same parameters. If not, the VPN connection as a link drop goes up and down, or due to a number of errors on the port or from a speed and duplex mismatch.
3. Firewall blocking the connection, so that the systemTo bring crash. Is (this is just a rare occurrence) NSDF (Norton Symantec Desktop Firewall) and NSPF (Symantec Norton Personal Firewall) can only do so if you trust the IP address of the VPN connection.
If you use the VPN address of the VPN client trust, you will be the firewall to crash. In your Internet browser click on Tools> Internet Options> Security> Trusted sites> Sites "and add the destination VPN address (es) to your trusted sites.
Q8Error: You have already installed the maximum number of adapters
Cause: You may have installed itself onto many virtual adapter in your IP stack
Actions:
1. Remove any unnecessary adapters;
2. Create multiple boot scenarios disable the adapters that are not required for this function;
3. You might also be banners Sock error on Win 95 and 98 units with this disease;
4. For more information, see this Microsoft article: KB217744: Unable to bind protocolsMore than 5 Network Adapters (copy and paste into the search tool) Enter bar>.
Q9 upgrade errors: The following are errors that occur when you try to upgrade / install the Nortel VPN Client 4.65
Error (1): Failed to get Registry key value for NT_IPSECSHM
Cause: This is caused because an important registry keys that are not found in the system registry.
Actions:
1. Uninstalling and reinstalling the VPN software
Error (2): LoginFailure by: Driver Failure
Cause: This is not to install a rule by either try with admin rights to the PC or to / use a Nortel VPN client that the operating system older.
Actions:
1. Make sure you have administrator rights on your PC.
2. Update / Install the latest version of the Nortel VPN client.
Error (3): Create socket failed with 10,048.
Cause: This problem generally occurs if you have another VPN clientSoftware installed on the system. The best-known conflicting clients are: AOL, Cisco VPN client (s), SSH Sentinel and PGP.
Actions:
1. Removing these clients will in most cases solve the problem.
(3) modems, VPN Troubleshooting Guide
Q1 Are cable modems for VPN access supported?
Yes, you can use cable modems for VPN access. However, you must aware of the following conditions and able to work in them:
* Some Cable modems require that you can authenticate to an NT network login.
* Some cable modems use a client like the Extranet VPN client and not both at the same time to run.
* Some cable modem Contracts / Acceptable Use Policies specify that you can not use it for business purposes, or they want to charge you another fee charged to use them for commercial purposes. Make sure that you thoroughly read your contract.
* Your cable modem provider is your ISP. Please note the> VPN connection-guide.html "> ISP Troubleshooting Guide for more information.
Q2 Why does my modem seem to perform erratically?
Always make sure you do not allow the operating system you choose a generic modem. If necessary, go to the appropriate Web site for the manufacturer of the modem and get the updated INF file so that the correct parameters are configured for the modem.
Q3 Why do I always have a connection speed slower than others with the same receiveModem?
1. Always check the modem configuration to check whether the maximum speed was chosen.
2. It is customary when the automatic installation of modems, which is the highest speed is not automatically selected.
3. Do not enable the box that says only run at maximum speed.
Q4 I have my modem in the phone line in a hotel or customer service office and now it is not working.
Always make sure that the phone line is plugging into you when you visit somewhere an analogLine is not a digital one. Plugging into a digital line permanently damage your modem to a replacement unit. To avoid these situations, you may contact the local site telephone support staff.
Q5 Why can not I have a 56Kb V.90 connection from some places that I go?
Here are some of the reasons why you do not receive, could be a 56K connection:
1. You are here longer than 3 ½ miles from your telephone companys central office (CO).
2. A smooth or Subscriber LoopSystem is used in your area.
3. You are calling from a digital PBX system that creates a digital-analog conversion and then an analog / digital conversion.
4. Their line includes digital pads or robbed bit signaling (RBS), which may affect your connection speed.
5. Their wiring is of poor quality.
6. Your modem's firmware may not be up-to-date. Check if your modem is the latest V.90 code with all the patches from the website of the manufacturer's web site is installed.
Q6Why can not I increased speed on my 56K V.90 modem into a NAG?
Here are some possible reasons:
1. A 56K V.90 modem is by design, where asymmetric download speeds can be as much as 56k but upload speed is up to 33.6bps. Works for 56k, it has only an analog-digital (A / D) conversion in your local telephone loop. So when analog modems at both ends, is never 56k speeds, since most PSTN exchanges run digital routing be achieved between the exchanges.
2. SomeNAG Web sites use analog phone lines with Cisco and standard 56k modems, and most PC dial-up use a similar modem. Between the two modems, it limits the download speed up to 33.6 kbit / s max.
3. In addition, many users might experience lower connection speeds for other reasons, such as more bad connections. These factors will also contribute to the quality and speed of the line.
(4) VPN ISP Troubleshooting Guide
Q1 When you see the message "Unable to getSolve the IP address of the remote server. Check the host name in the target field is correct. "When trying to connect with the extranet for customers in touch.
Try your destination name (Example: VPN. Something.com) and if it fails to your ISP to ensure that their DNS is functioning properly.
Q2 Why can not I Domain Available when dialing my ISP?
On your Internet Service Provider (ISP) dial-up connection. Click the right mouse and select PropertiesButton. Click the Server Type tab and make sure that the login box at the network is not selected.
Q3 Why did seem to run slowly through my VPN connection?
Try the software compression option in your Internet Service Provider (ISP) dial-up connection as a VPN client has its own compression. By clicking the right mouse button and select the Properties button. Click the Server Type tab and uncheck the
Q4 I keep getting busy signals when they tryconnect to my Internet service provider about what to do?
Contact your ISP to give the numbers that you try to connect. Often you will find that you have another number not yet published, which will work well to give. If not, may have to find another ISP that offers a better service.
Q5 When configuring the DUN icon for the ISP, what I have to write in the DNS or WINS settings?
Your ISP should supply with the DNS and WINS settings for the dial-up connection. Most of you onlyDNA, in which case you leave the WINS settings blank.
Q6 Why, when I load the Extranet Client on my PC and WinPoET is on my computer crashes or it does not function properly installed?
There are questions WinPoET running software on the PC with the Nortel Extranet (VPN) client.
To repair your system, boot in Safe Mode and uninstall the software WinPoET.
A simple solution is to install the Linksys BEFSR41 hardware router. It has a firmware PPPOE connector, whichWinPoET eliminated from the PC and offers the added benefit of a NAT firewall with the ability to hook up to three other PCs.
A second possibility is to search for a PPPoE client, do not interfere with VPN clients.
Find in your VPN-Doctor for Picture Guide, and other details.
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