Okay, all that said. the problem is that two days ago all of the browsers on this machine (Firefox (default), IE, Opera, & Safari) reported that they could not connect to any destination sites. E-mail client (Eudora) still works and FTP works from that machine. I've tried a system restore from three days ago (known working then) - same problem; backed out that restore. Tried pinging - all looks normal. Tried ipconfig /reset - no change. Tried bouncing the power to all units (off for one hour) - same problem. Tried reconnecting directly to switch - no change. Only clue is IE reported an HTTP error 12029 (?) a couple of times shortly after problem started. Failure responses come up immediately from browsers - no apparent time-outs.
Looks to me like something in HTTP part of the stack is broke or misconfigured. Any ideas?
Dave in Plano Texas