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Have a Compaq that was connected to a 2 user residential network. It got infected and I had to restore the hard drive using the Compaq "Restore" CD's. Now it will not see the Internet. When I bypass the Netgear router and connect directly to the cable modem it works fine. When I bring it to the test bench and connect it to another Netgear router it works fine. When I bring THAT router to the original cable modem and connect it, it does not work. Nothing has been changed except for the restore of the OS.
I am stumped.
Any suggestions would be greatly appreciated.
Thank you.
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If you have not already....shut off ALL (router, modem, PC). Disconnect all PCs from router).
Wait 5 minutes. Reconnnect to the router only the PC having problems. Power on the modem, wait 2 minutes. Power on the router, wait 1 minute. Power on the PC...wait 2 minutes. Then try to pull a page.
If still no access, RESET the router to its defualt settings (see the manual), then do the steps above.
Still no access.....then...
When you connect it to the other Netgear router on the test bench....is that router connected to a cable modem and accessing the Internet?
If so, is it the same cable modem or a different one?
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Both routers are identical and are set to their default configs. It's almost as if the cable modem doesn't like two PC's connected, however, shouldn't the router make the cable modem think that there is only one PC attached?
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Now you seem to be changing the problem statement. What connection is not working--modem to cable provider, modem to router, router to PC? Originally I thought it was the later, and it happened after a change to the PC. Now you're saying modem to router is the problem, and the router has been reset to factory settings.
If your cable company is expecting to see a particular MAC address (that of your PC) you need to reinitialize the router as you did when you first got it.
Terry
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Sorry if I got sidetracked. The problem is as my original posting stated - I was merely speculating on the cause. Regarding the modem, I unpluged it for several minutes. There are 2 PC's involved. PC1 was not altered and it always works fine when connected to the router. PC2 is the one that had the OS reinstalled and it cannot get online when connected to the router. It's fine when connected directly to the cable modem or to another router with a different cable modem in a different location. When I do an ipconfig on PC2 when it's connected to the router, there is no IP address or DNS name. When I connect it directly to the cable modem, all the ipconfig info is there.
Let me know what other info I can supply.
Thank you.
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>> It's fine when connected directly to the cable modem or to another router with a different cable modem in a different location.<<
Are both the routers the same brand AND model? The modem in a different location....is it the same cable brand AND model AND with the same cable company? (ie not a DSL connection or other cable company) AND....If the same cable company, is it the same type of service (eg a standard residential account vs a business account?).
If ALL is identical all round (same brand and model router, etc.) then, are you SURE the router through which the PC will NOT connect has the Exact same settings as the other router?
If so....if you have not already, try disconnecting the other PC from the router, reboot all, and only have the PC in question attached...perhaps there is some sort of conflict with the 2nd PC.
ALSO...make sure the network connection / nic on the prob pc has the properties of its IP protocol set to "Obtain IP automatically" (assuming your cable company does not require something else...which is not very common).
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raaone, I am speaking of the router and PCs in your original posting. Stop reading when you find a FALSE ASSUMPTION.
Your router (or PC when connected directly to the modem) obtains IP address automatically from your ISP.
Your router is set to expect your PC clients to be assigned a specific IP address (i.e., DHCP server for LAN is NOT enabled).
During the restore the TCP/IP setting got changed to the default "Obtain IP address automatically."
Your PC will now work with the modem but not with the router.
Your other, unaffected PC, still works with the router, but will not work if connected directly to the modem.
You now need to change your PC to the IP address you were using before the disk restore; or else leave it alone and change both the router and the other PC to use automatic (DHCP) IP addresses.
Remember, you were supposed to stop reading when you came to a false assumption. But, hope this helped.
Terry
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Well, here ir the answer. When the cable company ran the 30 foot CAT5E cable from the router to second PC, they wired it wrong. Electrically, it was correct, but the twisted pairs were not use properly. I put new RJ-45's on each end following the CORRECT wire colors and all is fine.
Thank you all for your help.
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Thanks for posting back...
Computing.net threads are much more useful for future reference when the original poster adds a final entry confirming / sharing the eventual solution.
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