Serving across multiple networks to the Internet

[Greg M]

I'm looking to connect a Windows 2000 IIS server to 2 Internet connections.
The site is high bandwidth, low processor and low disk usage.

The setup would be pretty much 2 DSL lines, 2 firewalls, 2 switches, 2
NICs, 2 IP addresses and possibly 2 host names (WWW1 and WWW2) . I can not
route between the two networks as the ISPs will not allow it. Both
connections have other services running as well, so I can't change
firewall/routers.

If I remember correctly, Windows will switch between the two networks
automatically if I define a default gateway for both. What I need is if a
connection comes in on one IP address and NIC, goes out on that IP address
and NIC. I know there is a registry setting that forces this, but I can't
find it.

Does anyone have a similar configuration? Does anyone know what registry
setting defines this behavior?

Thanks everyone.

-Greg

 

[Phillip Windell]

If I remember correctly, Windows will switch between the two networks
automatically if I define a default gateway for both. What I need is if a
connection comes in on one IP address and NIC, goes out on that IP address
and NIC. I know there is a registry setting that forces this, but I can't
find it.

No. It won't unless the two outbound "paths" are the same subnet,...and I
really doubt these two Internet connections are. It is called Dead Gateway
Detection, and it does not behave as well as you might think (even when it
works).

If these are Cabel/DSL lines the cleanest way to do this would be to buy a
DSL NAT Device that has 2 WAN ports and can accept and work with to
Connections. Linksys makes some and I am sure the other make some too.

If these are commercial grade lines (like a T1's) then most commercial grade
routers would have two serial ports, so you would hook both lines into the
same router. The router could do fail-over or load balancing,...but it may
require cooperation with the ISP's (you'll have to investigate that).

Remember that if the ISP doesn't want something done with those lines you
are screwed. The lines belong to them, not you, and they have almost
absolute control over what happens on them.