My main desktop Win2kPro machine also acts are the router between my wired network with my servers on and my wireless network with my Rio Receiver and laptops on. My network is a bit arse-about-face because I have a wireless access point with just my Receiver plugged into it and a PCI wireless card in my Win2kPro machine (due to the fact that when I went
wireless Ethernet-wireless bridges were still silly prices).

The PCI card is in my desktop machine rather than my servers because:
- can't face making what is essentially a PCMCIA card
- don't want to mess about with my Win2kServer machine as that has to be 100% reliable

Anyway, enough of the excuses, on to the problem.

The Win2kPro machine has been working quite happily for ages routing between the two networks. I enabled routing with the registry setting:

HKEY_LOCAL_MACHINE \SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\IPEnableRouter

For some reason recently the box just decides to turn off the routing. It can see both networks, machines on both can see it, but it doesn't pass any packets.

When it is in this state the output of ipconfig /all shows:

IP Routing Enabled. . . . . . . . : No

Checking the registry value at this point shows it is still set to enable routing.

At this point the only way I can get routing going is to reboot the machine. I tried downing and upping both the interfaces, but that didn't help.

This is happening about twice a week now and it is starting to tick me off. Anyone have any suggestions ?