Your VPN Doctor for Virtual Private Network

Listed below are some troubleshooting guides for specific subjects.

(1) Your Digital Community Connection

(2) VPN Troubleshooting Error Messages

(3) VPN Modems Troubleshooting Information

(4) VPN ISP Troubleshooting Information.

(1) Your Digital Non-public Community Connection

Having hassle connecting to the internetport Web at dwelling strive these steps earlier than calling for assist.

1. Do you may have an IP deal with? Attempt ipconfig /all. If you happen to shouldn’t have an IP deal with reboot your PC. If that does not work energy cycle your Cable/DSL modem and routers and reboot your PC once more after the community units are up and steady. Ensure your whole community cables are plugged in tight.

2. After your PC reboots examine that your community adapter is lively and packets are flowing. Carry out the ipconfig /all examine once more.

3. Verify your connectivity by pinging a number of web Web websites. If that doesn’t work, ping the loopback deal with If that fails, your adapter might not be working or it isn’t correctly configured.

To examine your IP deal with. From command immediate enter ipconfig /all (as proven within the image) it is best to see an IP Handle and several other DNS Server addresses. The area identify system (DNS) is the best way that Web domains are positioned and translated into IP addresses and is required for searching the Web.

Ping – loopback Check (as proven within the image). The loopback check is used to examine if the IP stack is responding. If it occasions out otherwise you get an error the issue might happen if any a number of of the next circumstances is true:

*The TCP drivers are corrupted

*The community adapter shouldn’t be working

*One other service is interfering with IP

Verify your community adapter, click on the Begin menu, Settings, Management Panel, and choose Community Connections. Double click on on the Native Space Connection or the Wi-fi Adapter whichever one you might be utilizing. Ensure its Linked. In case you have a number of community playing cards disable the one you aren’t utilizing.

There ought to be Packets displayed in each the Despatched and Obtained counters. If the Obtained counter is 0 examine that the adapter has an IP deal with. Choose Properties.

Click on the examine bins for Present icon and Notify me beneath. A twin PC icon will seem on the decrease proper portion of the taskbar within the tray space and can flash whereas sending and receiving packets. You may place your mouse over the icon to get the standing and click on on it to get extra particulars.

Tracert shows the connection path to the goal location and the variety of hops. Every hop is the journey from one router to a different. Tracert is a helpful software each for understanding the place issues are within the community and for figuring out latency between hops.

Ping is used to find out whether or not a number exists and is lively on the community and might decide the spherical journey time to the machine. You may enter a number identify or an IP deal with if you realize it. If the request occasions out then the host shouldn’t be reachable as a result of it is offline or there’s a drawback with the connection. Attempt a number of websites, if none work then ping the loopback deal with Additionally, in case your DNS shouldn’t be working or correctly configured you’ll be able to solely ping the host with an IP deal with and also you won’t be able to browse the Web.

In case you are having intermittent issues, carry out a ping -t for five to six minutes then hit CTRL C to see the outcomes of the check to find out in case you are dropping community packets (misplaced packets). In case you are, this normally signifies an ISP drawback or Cable/DSL modem drawback. See VPN ISP Troubleshooting Information

(2) VPN Troubleshooting Error Messages

Q1 Error Message: Distant Host not responding: or Unable to Resolve the IP deal with of the Distant Server

Trigger: This means that the Contivity VPN Swap by no means responded to the connection try. The issue may both be with the Contivity change itself, (change could also be down) or your machine could also be having an issue resolving the IP deal with.

Motion: Attempt pinging your vacation spot identify (Instance: If you happen to obtained a message that claims “Request Timed Out” from the ping command, name your ISP to be sure that their DNS is functioning accurately.

Q2 Error Message: Most variety of periods reached

Trigger: This means that the utmost variety of customers for the account you might be utilizing are presently logged on.

Motion: In case you are the one consumer with VPN to your account, it’s doable to get this error in the event you restarted a connection instantly after shedding the dial-up connection to your ISP. It’s because the Contivity VPN Swap takes as much as one hour to find out that your connection has been dropped and log you off out of your account.

Q3 Error Message: Login failed, Please seek the advice of the change log for additional data

Trigger: The Consumer Identify or the Password is inaccurate for the consumer identify entered.

Motion: Confirm that the Consumer Identify you entered is appropriate and retype the Password earlier than making an attempt the connection once more.

This autumn Error Message: The bodily connection has been misplaced

Trigger: Your connection to your ISP was disconnected.

Motion: Re-establish your connection to your ISP earlier than you re-establish the Contivity connection to the distant community.

Q5 Error Message: The safe Contivity connection has been misplaced

This message may end up attributable to a lot of totally different causes, and there are a number of advisable actions you’ll be able to take to attempt to re-connect.


If you happen to obtain this error earlier than the shopper connects then one thing is obstructing a needed port (resembling ESP port 50). This will consequence in case your firewall shouldn’t be configured correctly and is proscribing the mandatory port(s).

If you happen to obtain this error throughout a connection and also you all of a sudden get the error it could imply one of many following:

1. One thing closed the connection;

2. The VPN Contivity change the place you have been making an attempt to hook up with thought your shopper was down or timed out;

3. Your native ISP did one thing that interrupted your community connection lengthy sufficient for the VPN Contivity change to determine your shopper was not responding;

4. The VPN Contivity change that you’re related to has both logged your connection off or the Swap is not responding, or a tool that doesn’t assist IPSEC NAT Traversal is inflicting the connection failure.


1. Attempt re-establishing the Contivity connection by clicking the Join button. If this works, the connection was most likely misplaced as a result of Idle Timeout configured on the Contivity VPN Swap. If no knowledge is transferred by the Contivity connection for a protracted time period, quarter-hour or extra, the Contivity VPN Swap robotically disconnects the connection;

2. If you happen to have been unable to efficiently re-establish the Contivity Connection, the dial-up connection could also be stopping knowledge from touring between the Contivity VPN Shopper and the Contivity VPN Swap. Dangle up the dial-up connection and reconnect earlier than you attempt to re-establish a connection to the Contivity VPN Swap;

3. In case you are nonetheless unable to hook up with the Contivity VPN Swap, open a Command Immediate and check out pinging the Contivity VPN Swap utilizing the host identify or deal with that you just specified within the Vacation spot area.

(a) If you happen to obtain a “Vacation spot Unreachable error” there’s a routing drawback on the ISP.

(b) If you happen to obtain a “Request Timed Out” error message, the Contivity VPN Swap might be not obtainable, and it is best to contact your Community Administrator.

4. If you happen to maintain getting this message and are unable to attach, then it could point out that the Contivity VPN Swap is unable to speak with the shopper as a result of it’s behind some form of NAT (Community Handle Translation) machine. NAT (Community Handle Translation) Traversal permits a lot of units on a non-public community to entry the Web concurrently with out every requiring its personal exterior IP deal with. Most lodges and airports that present Web connectivity use NAT to hook up with the Web.

Q6 Error Message: Can’t Alter Routing Desk

Trigger: Message means the you the consumer, an utility in your machine, or your ISP tried to vary the routing desk by way of an ICMP redirect try and it was not profitable. The shopper detects the try and make the change, determines it is a safety breach and shuts down the shopper’s connection. Any time you make a VPN connection, you can’t change the routing desk, as a result of the VPN Shopper views this as a safety threat and you’ll get disconnected.

Some purposes require an ICMP redirection so as to work resembling a recreation or different third social gathering software program.

Motion: If you happen to obtain this error and cant join attributable to an ICMP redirect try, shut down some other purposes you might be utilizing which can be inflicting the ICMP redirect try. If it’s the ISP that’s doing it, you will want to dam the ICMP redirect request. You may determine that ICMP redirect has occurred, by seeing a message saying there was an IP deal with routing desk change.

Q7 Error Message: Receiving Banner Textual content Data

Trigger: Message means you might be experiencing a Banner Sock difficulty, and can see a window displaying the “Receiving Banner Textual content” message after which will get disconnected.


1. Disable the firewall utterly to check. It is a port 500 difficulty and sometimes implies that the you may have a private Firewall that’s blocking port 500 or you may have a router that doesn’t assist IPSEC pass-through, and the you might be connecting to a VPN change that doesn’t have NAT Traversal enabled.

2. If utilizing wi-fi, briefly take away Wi-fi from the image and concentrate on the Ethernet card. Verify the Ethernet card pace and duplex parameters after which be sure that the hub, change, or router that’s on the opposite finish has the identical parameters. If not, the VPN connection will drop because the hyperlink goes up and down, or attributable to a lot of errors on the port from a duplex and or pace mismatch.

3. Firewall that blocks the connection, such that system will crash. (This can not often occur) NSDF (Norton Symantec Desktop Firewall) and NSPF (Norton Symantec Private Firewall) can do that although, if you don’t belief the IP deal with of the VPN connection.

If you don’t belief the VPN deal with of the VPN shopper, the firewall will trigger you to crash. In your Web browser click on on “Instruments > Web Choices > Safety > Trusted Websites > Websites” and add the vacation spot VPN deal with(es) to your trusted websites.

Q8 Error Message: You have already got the utmost variety of adapters put in

Trigger: You’ll have put in to many digital adapters in your IP Stack


1. Take away any pointless adapters;

2. Create a number of boot situations disabling the adapters that aren’t required for that perform;

3. You may additionally get Banner Sock errors on Win 95 & 98 models with this situation;

4. For extra data, see this Microsoft article: KB217744: Unable to Bind Protocols to Extra Than 5 Community Adapters (copy and paste into the search software bar > enter).

Q9 Improve Errors: The next are some errors which will happen when making an attempt to improve / set up the Nortel VPN Shopper 4.65

Error (1): Did not get Registry key worth for NT_IPSECSHM

Trigger: That is precipitated as a result of an vital registry key that can not be discovered within the system registry.


1. Uninstall and Reinstall the VPN Software program

Error (2): Login Failure attributable to: Driver Failure

Trigger: That is typically brought on by both not having Admin rights to the PC or by making an attempt to put in/use a Nortel VPN shopper that predates the working system.


1. Guarantee that you’ve got admin rights to the PC.

2. Replace/Set up probably the most present model of the Nortel VPN shopper.

Error (3): Create socket failed with 10048.

Trigger: This drawback typically will happen every time you may have one other VPN shopper software program put in on the system. Probably the most famous conflicting shoppers are: AOL, Cisco VPN Shopper(s), SSH Sentinel and PGP.


1. Eradicating these shoppers will usually, resolve the difficulty.

(3) VPN Modems Troubleshooting Information

Q1 Are Cable Modems supported for VPN Entry?

Sure, you need to use cable modems for VPN entry. Nonetheless you will need to concentrate on the next circumstances and be capable to work inside them:

*Some cable modems require that you just log into an NT community to get authenticated.

*Some cable modems use a shopper much like the Extranet Shopper for VPN and each won’t run on the identical time.

*Some cable modem Contracts/Acceptable Use Insurance policies specify that you just can not use them for enterprise functions or they need to cost you one other price to make use of them for enterprise functions. Be sure you learn your contract totally.

*Your Cable modem supplier is your ISP. Please see the VPN-connection-guide.html”>ISP Troubleshooting Information for extra data.

Q2 Why does my modem appear to carry out erratically?

All the time just remember to don’t let the working system choose a generic modem. If required, go to the suitable website for the seller of the modem and get the up to date INF file in order that the right parameters are configured for the modem.

Q3 Why do I all the time appear to get a slower connection pace than others with the identical modem?

1. All the time examine the modem configuration to confirm that its most pace has been chosen.

2. It is not uncommon when auto-installing modems that the very best pace shouldn’t be chosen robotically.

3. Don’t examine the field that claims run at most pace solely.

This autumn I plugged my modem into the telephone line on the resort or prospects workplace and now it doesn’t work.

All the time be sure that the telephone line you might be plugging into when visiting someplace is an analog line not a digital one. Plugging right into a digital line can completely harm your modem, requiring a alternative unit. To keep away from these conditions please contact the native web site telephone assist personnel.

Q5 Why cant I get a 56Kb V.90 connection from some areas that I am going to?

Listed below are a few of the the explanation why you may not get a 56K connection:

1. You’re positioned greater than 3 ½ miles out of your phone companys central workplace (CO).

2. A SLICK or Subscriber Loop System is utilized in your space.

3. You’re calling from a digital PBX system, which creates a Digital to Analog conversion after which an Analog to Digital conversion.

4. Your line incorporates digital pads or Robbed Bit Signaling (RBS), which might degrade your connection speeds.

5. Your wiring could also be of poor high quality.

6. Your modem’s firmware might not be up-to-date. Verify that your modem has the latest V.90 code put in with all of the patches from the seller’s website.

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