Strange IP problem...

[MarcoCianciulli]

OK guys, I know this has been touched on before, but I have NOT found a solution to the problem. I have a system with an intergrated NIC, running XP Pro Service Pack 2. The computer is connected to the lan/wan through a Compaq Repeater (10Base-T), and several other computers (XP Pro, and OpenVMS) are all connected to the same lan/wan/internet with no problems. What happens is this: Open any web browser, command prompt FTP or Telnet, and you get no connectivity. The system resolves the DNS without issue, and I can ping the host and get returns that will go on forever. If I FTP I can connect to the server (login) but if I do a directory, it says file transfer complete (after a very long time) yet prints nothing. Web browsers, IM, and the like also resolve the address, and attempt to connect, but get nothing back. I've been a Systems Administrator/Systems Manager for 15 years and have never seen this one before. Help this old guy out, please...

 

[LeeMcCauslin]

Are you using DHCP? We have had a somewhat similar problem lately. On 2 different PC's we have lost internet connectivity even though the pc can see everyone on the network and I can open a command prompt and ping yahoo and google. I fixed it by going into DHCP and marking those 2 ip adresses as bad and reserving them to mac address 000000000000
then releasing and renewing the pc so it would pick up a new address and they were able to get right on the internet.

I do NOT believe that is the proper solution as I still don't know what caused it in the first place but it was an effective workaround. Our network is mostly xp and server2003 but we do have a vms machine too.
Some googling of my own seems to suggest a problem with broswer caching and the way IE does URL wrapping (type "google", hit ctrl + enter and get

http://www.google.com)

but I haven't figured out for sure if that's what our problem was.

Mine was just web browsing though - never tried an ftp connection on those PCs.

 

[burtsbees]

Firewall? Access control list?

Burt

 

[burtsbees]

Could also be a duplex mismatch, with 100MB NICs at full duplex and the 10MB hub, which can only connect at 10MB, 1/2 duplex...

Burt