Doctor for your VPN VPN, Virtual Private Network Troubleshooting Guide
Here are some troubleshooting guides for specific topics.
(1) the virtual network connection
(2) VPN Error Messages
(3)-Modem VPN Troubleshooting Guide
(4) Troubleshooting VPN Guide ISP.
(1) Your Virtual Private Network
Do you have problems connecting to the Internet at home try these steps before asking for help.
1. Do you have an IP address? Try ipconfig / all If you do not have aIP address, restart the PC. If this does not work and turn on the cable modem / DSL router and restart the PC after the network equipment and are stable. Make sure all are connected the network cable tight.
2. Check after a restart of the PC, if your network card is enabled and packets are flowing. Check the ipconfig / all again.
3. Verify connectivity by pinging various websites. If this fails, ping the loopback address 127.0.0.1. If not,The card can not work or is not configured correctly.
To verify the IP address. From the command prompt type ipconfig / all (as shown in photo), do an IP address and DNS server to see multiple addresses. The Domain Name System (DNS) is the way that Internet domain names and IP addresses are translated into and you need to surf the web.
Ping 127.0.0.1 - loopback test (as shown in photo). The loopback test verifies that the IP stackresponding. If the time is up or you get an error message if the problem occurs, one or more of the following conditions:
* The TCP drivers are corrupted
* The network adapter does not work
* Another service is interfering with IP
Check your network adapter, click Start, Settings, Control Panel and select Network Connections. Double-click the wireless LAN or the Wireless Adapter on what you use. Make sure you are connected. If youTo disable network cards, do not use.
It should appear in two packets sent and received counters. If the received count is 0, make sure the card has an IP address. Select Properties.
Click the check box icon and send it down. Two of the PC icon in the bottom right of the taskbar 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 useful tool to understand where the problems on the network and for determining latency between hops.
Ping is used to determine if a host is present and active in network and it is time to return the device to determine. You can use a host name or IP address if you know it. If the requestTimeout then the host is unreachable because it is online or is there a problem with the connection. Try several sites that do not work, then ping the loopback address 127.0.0.1 Also, if the DNS is working or not configured properly, it can only ping the host with an IP address and will not be able to be at sea on the Internet.
If you have problems with, at times, ping-t for 5 or 6 minutes, then press CTRL C to see the results of the tests that determine whether you fall downNetwork packets (packet loss). If so, it usually shows a problem with your ISP, or cable / DSL modem problem. See Troubleshooting Guide for VPN ISP
(2) VPN Error Messages
Q1 error message: The remote host does not answer: Can not connect to the server or release the IP address of the remote control
Cause: This means that Contivity VPN Switch never responded to prove the connection. The problem may be or with the Contivity switch itself,(Switch down) or the machine with a problem the solution the IP address.
Action: your goal (eg name Something.com VPN). Do if you receive a message that "expired" by the ping command, call your ISP to ensure that their DNS is working properly, he says.
Q2 error message: Maximum number of sessions reached
Cause: This means that the maximum number of users for the type of account you're currently logged inup.
Action: If you are the only user account to your VPN, you can get errors if you set this compound A immediately after the loss of dial-up connection to your ISP. This is because Contivity VPN Switch takes an hour to determine the extent to which the connection was terminated, and log into your account.
Q3 error message when logging error, see the switch log for more details
Cause: The username or passwordhas entered the correct user name.
Action: Verify that the user name entered is correct and enter the password before connecting.
Q4 error message: The physical connection is lost
Reason: it was interrupted the connection to your ISP.
Action: Re-connect to your ISP before resetting the Contivity connection to the remote network.
Q5 error message: The connection was secure Contivitylost
This message may cause due to a number of different reasons, and there are several actions recommended, you can try and reconnect.
Case (s):
If this error message before the client connects then something is blocking a necessary port (such as port of ESP 50). This can occur if the firewall is not configured correctly, the restriction of the port need (s).
If you receive this error message during a connection, and suddenly the error message can mean aof the following:
1. Something the connection is closed;
2. The Contivity VPN switch, where you try to connect to their customers down or thought had expired;
3. Your local ISP has done something that has stopped long enough to Contivity VPN switch responds to your network to identify your customers has been;
4. The Contivity VPN switch with which you are connected, or you have the switch disconnected or not responding,or not a device supports IPSec NAT traversal and is the connection failure.
Measure (s):
1. Try re-establish the Contivity connection by clicking the Connect button. If it works, the connection was lost probably due to the idle timeout configured on the Contivity VPN Switch. If no data is transmitted over or through the Contivity connection for a long time, 15 minutes, the Contivity VPN Switch automatically Connection;
2. If you were not successful, to restore the Contivity connection, dial-up can prevent data from traveling between the Contivity VPN Client and the Contivity VPN Switch. Mount the dial-up and close, change before groped again to connect to the VPN Contivity;
3. If you switch still does not connect to the Contivity VPN, open a command prompt and try Contivity> VPN switch with the host name or address specified in the Destination field.
(A) If you are a "destination unreachable error" has received a routing problem is the ISP.
(B) If you bug out a "Request timed out" Contivity VPN Switch is probably not available, and should contact your network administrator.
4. If you receive this message and dial are not, then it can be shown that the Contivity VPN Switch is'not communicate with the customer, because it is behind a type of NAT (Network Address Translation) device. NAT (Network Address Translation) Traversal allows a number of devices on a private network to access the Internet simultaneously without each with its own external IP address. Most hotels and airports that provide Internet connectivity to use NAT to connect to the Internet.
D6 error message: Can not be changed routing table
Cause: Message: is the user,Application on your computer or your ISP tries to change the routing table via an ICMP redirect attempt, and had no success. The client detects the attempt to change, set a security breach, and passes the client connection. Every time that you can use a VPN connection does not change the routing table because the VPN client sees this as a security risk and the connection is broken.
Some applications require an ICMP redirect toIt works like a game or other third-party software.
Action: If this error message and can not connect because of an ICMP redirect attempt to close all other applications which may be the cause of the ICMP redirect attempt. If it is the provider to do this, you must block ICMP redirect request. You can see that ICMP is verified by the sight of a message that should divert or change a table of IP routing was.
Q7 error message: Getting Banner TextInformation
Cause: This message means that you will enjoy a banner Sock problem, and a window with the "welcome banner text" message and then suspended.
Actions:
1. Disable the firewall test. This is a port 500 issue and often means that the support of a personal firewall that blocks port 500 or you have a router, which does not pass-through IPSec NAT-Traversal, and you connect to a VPN switches are notactivated.
2. When using wireless, wireless to temporarily remove from the picture and focus on the Ethernet card. Check the parameters of the Ethernet card speed and duplex and make sure the hub / switch or router that is on the other end has the same parameters. Otherwise, the VPN connection will drop as the bond goes up and down, or a high number of errors on the door of a duplex and the speed is not consistent.
3. Firewall blocking the connection, so that the systemCrash. (This occurs only rarely) NSDF (Norton Symantec Desktop Firewall) and NSPF (Symantec's Norton Personal Firewall) can do, but if you do not trust the IP address of the VPN connection.
If you do not trust the address of the VPN client VPN, firewall crashes on you. In your Internet browser click on Tools> Internet Options> Security> Trusted sites> Sites "and add the VPN destination address (es) of your trust toLocations.
Q8 error message: You already have the maximum number of cards installed
Cause: You can have more cards in your virtual IP Stack
Actions:
1. Remove any unnecessary adapters;
2. Create multiple scenarios start off the tabs that are needed for this function;
3. You can also have banner Sock error on Win 95 and 98 units with the State;
4. For more information, see this Microsoft article: KB217744:It can record more than 5 Bind NIC (copy and paste into the toolbar search> Enter).
Q9 Upgrade error: The following are some errors that may occur when you try 4.65 upgrade / install the Nortel VPN client
Error (1): Failed to get the key value of the registry to NT_IPSECSHM
Cause: This is caused because an important registry key that can not be found in the registry.
Actions:
1. Uninstall and reinstall the VPNSoftware
Error (2): Logon failure due to: Driver failure
Cause: This is not generally available through the system privileges on your PC or try to install with Admin / use of the Nortel VPN client operating system, which is earlier than that.
Actions:
1. Make sure you have administrative rights on your PC.
2. Update / Install the latest version of the Nortel VPN client.
Error (3): create socket failed with 10048th
Cause: This problem typically occurs whenhave another VPN client software installed. The conflict most famous clients are: AOL, Cisco VPN client (s), SSH Sentinel and PGP.
Actions:
1. Removing these clients will often solve the problem.
(3)-Modem VPN Troubleshooting Guide
Q1 cable modems are supported for VPN Access?
Yes, you can access using cable modem to the VPN. However, you must observe the following conditions andbe able to work in them:
* Some cable modems require that you get access to a network NT authenticated.
* Some cable modems use a client like the Extranet VPN client for the same time does not run on.
* Some cable modems Contracts / Acceptable Use Policies specify that you can not use it for commercial purposes or otherwise want to impose a fee to use them for commercial purposes. Read the contract carefully secure.
* Your Cable ModemProvider is your ISP. Please note the VPN connection-guide.html "> ISP Troubleshooting Guide for more information.
Q2 Why is my modem seems to play illegally?
Always make sure you do not let the operating system you specify a generic modem. If necessary, the appropriate Web site to go to your modem manufacturer and get the updated INF file so that the correct parameters configured for the modem.
Q3 Why do I always seem to have a slower connectionSpeed compared to others with the same modem?
1. Always check to verify the configuration of your modem, if its top speed is selected.
2. E 'municipality in which the automatic installation of modems that are selected is not the highest speed automatic.
3. Do not select the field at full speed, he said.
Q4 I put my modem into the phone line to customers of the hotel or agency, and now does not work.
Always check that the phone line while connectedThe visit is not an analogue to a digital one somewhere. Connecting to a digital line can permanently damage the modem will need a replacement. To avoid these situations, contact your local site telephone support.
Q5 Why can not I have a connection V.90 56Kb of some places I go?
Here are some of the reasons why you may not have a 56K connection:
1. There are more than 3 ½ miles away from home on the telephone company(CO).
2. A smooth or subscriber loop system is available in your area.
3. This is a digital PBX system that generates a digital-analog conversion and then calling an analog-digital conversion.
4. Their line includes digital pad or a little 'robbed signaling (RBS), which can affect the connection speed.
5. The wiring can be of poor quality.
6. the firmware of the modem may not be up-to-date. Check if your modem is the latest version of the code is installed with all V.90Patch from the manufacturer's Web site.
Q6 Why is a higher speed on my 56K V.90 modem, in some NOS?
Here are some possible reasons:
1. A 56K V.90 modem is asymmetrical design that download speeds can be up to 56k, but upload speed is up to 33.6bps. 56k for the job, has only an analog to digital (A / D) conversion in the cell cycle locally. So when the analog modems at both ends are 56k speeds are never reached, because most PSTN exchanges rundigital routing between exchanges.
2. Some sites use NAG analog phone lines with Cisco and standard 56k modem, and most PCs use a dial-up modem similar. Between the two modems, it limits the download speed up to about 33.6 kbit / s maximum.
3. Although many users with slower connection speeds for other reasons, such as poor line quality. These factors contribute to the quality and speed of society.
(4) VPN ISP TroubleshootingHelp
Q1 Are you getting the message "to solve. The IP address of the remote server, you can verify the host name in the destination field is correct." If you try to connect to the client extranet.
Test your target name (eg Something.com VPN) and if it fails, contact your ISP to ensure that their DNS is working properly.
Q2 Why can not I domain exists in the choice of my ISP?
Internet Service Provider (ISP)Dial-up. Click the right mouse button and select Properties. Click the Server Type tab and make sure that registration is not enabled "in the field of the network.
Q3 Why does it seem slowly through my VPN connection?
Try the software compression option in your Internet Service Provider (ISP), dial-up VPN as a client is its compression. Click the right mouse button and select Properties. Click the Servers tab and typeDelete the
Q4 keep getting busy signals when trying to connect to my ISP, what should I do?
Contact your ISP, the numbers that you try to be a connection. Often you will not have published an alternative number that works well. Otherwise, you may have a different Internet service provider offering a better service to find.
Q5 When you configure the dial-up icon for my ISP, what do I need WINS in DNS settings /?
The ISP should providesetting DNS / WINS for your dial-up. Most of you only DNS, in this case, leave the WINS settings.
Q6 Why when I load the Extranet Client on my PC and installed on my WinPoET crashes, will not work properly?
There are problems with WinPoET software on your PC with the Nortel Extranet (VPN) client.
To repair boot into safe mode and uninstall the software WinPoET.
A simple solution is to install the LinksysBEFSR41 hardware router. It has a firmware PPPOE connector, which WinPoET deleted from your PC and offers the added benefit of a NAT firewall with the ability to connect up to three other PCs.
A second option is to find customers with a PPPoE client that does not interfere with the VPN.
Contact your doctor for more details and VPN Picture Guide.
Qiuck Need a Fix, Tool, Trick or Tip? The VPN is the medical care!
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