all external web functionality goes down

[tlachaussie@gmail.com]

I have a Windows 2003 server that I am using to host a website. The
problem is that at least once a day all external web functionality
comes to a hault. The reason I only say external is because I can
still go to the website using the internal server name or IP. And the
reason I say 'comes to a hault' is because I am able to access the
website for a couple hours at a time, at which when things go bad
restarting the server brings things back to working condition again
for another couple hours.


Below is my configuration.


External IP 1 - Firewall 1

Internal IP 192.168.111.33 Gateway 192.168.111.1 DNS Server
192.168.111.9


External IP 2 - Firewall 2

Internal IP 10.10.10.5 Gateway 10.10.10.1 DNS Server 10.10.10.5

So as you can see I have another server acting as the Domain
Controller (192.168.111.9)
10.10.10.5 is the only machine in the IP range of 10.10.10.x

I also noticed that when things seem to go wrong, I do an IPCONFIG and
the Default Gateway for 10.10.10.5 no longer appears, eventhough it is
manually set in the TCP/IP Properties. When I restart the server and
do IPCONFIG, the default gateway for 10.10.10.5 suddenly reappears and
everything is back to normal.
This seems to be what my problem is, but I am not sure what is causing
it.

Thanks in advance for all your help.