XP Home/2003 IE7 problems

[techhelp]

I can't get an XP Home computer to successfully browse the internet when physically connected to an SBS 2003 network. NSLookup resolves external name/addresses, and I can ping outside the network, I can print to local network printers, but IE7 won't open any web pages outside of our local domain. If I connect to the router and bypass firewall and local network, IE7 works fine, but then no local printer. Suggestions?

[zelkea]

Do you have a proxy in place? If you are using a static IP address, check your default gateway for a type-o.

AJZ

[techhelp]

I do not have a proxy, and I'm using DHCP.

[zelkea]

Are you able to ping your default gateway?

[techhelp]

Yes, I can even ping other sites (like google.com).

[zelkea]

Techelp,
Do you have another browser installed? Does it have the same behavior?

If so the only other thing I can think of is, your MTU (Maximum Transmission Unit) the default setting is 1500 I would try dropping this down to 1400 reboot and test your connectivity. Here is the key to set the MTU HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{adapter id}\MTU.

AJZ

[techhelp]

I'll try it, but it may be a few days before I have access to the computer. Thanks.