Only one computer on network fully connects to internet

[DonInKansas]

I'm at work trying to figure this out. WE have 5 computers on a network connected by a switch, behind a firewall. All of the computers except one cannot fully connect to the internet. What's REALLY weird is TPU will come up on this computer, but no other webpage. I've reset the modem, firewall, switch, flushed DNS, all kinds of stuff with no luck. Any networking junkies have any other solutions I haven't tried? This seems to pop up every month or two.

 

[kimbrasil]

With only this infos is not possible to detect possibilities.
Your gateway is your firewall? Is hardware or software based?
What is the IP and DNS from the computer that access all web?
What is the another computers IPs and DNSs?
Who configs your firewall?

 

[streetfighter 2]

I think what kimbrasil is trying to say is: is your firewall a gateway which provides a DHCP service?

Have you tried running 'ipconfig /release' and 'ipconfig /renew'? Have you tried pinging the computers from the firewall?

 

[Kreij]

What's REALLY weird is TPU will come up on this computer, but no other webpage.

I don't see the problem.

More info would be helpful as kinbrasil said.
Do you have a server on the network? Is it your DNS server?
Are you using DHCP?
Firewall config'd to block ports?
etc.

 

[Wrigleyvillain]

Do some traceroutes to any external machine (www.yahoo.com for example) in a command window and see where it dies out. Compare between working machine and one that can't get out.

 

[Batou1986]

Whats doing dhcp or do you have static addresses
secondly does the firewall do routing and nat if not that may be your problem right there