Win98se system... Intel EtherExpress Pro/10+ ISA NIC... TCP/IP bound to the NIC, set up to use DHCP. It gets an IP, I can ping the gateway on the network, other computers on the network, and even internet servers like www.voyager.net and www.google.com... I get ping responses to all of them. I have NetBIOS over TCP/IP enabled and can browse the network fine from that computer, and browse that computer from others. I can transfer files to and from it that way. NET DIAG over NetBIOS says it's fine.
The Problem: Can't open a TCP port *anything*. Though it can ping anywhere, and resolve names fine... it can't open ports to anywhere. I can't load pages from any of the hosts I can ping. I can't load pages off apache on my NetBSD box on the intranet. I can't telnet to my NetBSD box. Nothing.
Ping fine, connect not at all. NetBIOS over TCP fine, plain TCP not.
Does *anyone* have any idea why this is? What causes it? How it can be fixed? Anything that could help? :P I really have no earthly idea.