Two nics, two ISP's

[Phil]

Is it possible to serve webpages through IIS using two seperate nics on two
differnet subnets (using IP addresses)?

If so, how can I create a new subnet using my Linksys? It is presently set
at 255.255.255.0, I tried changing it to 255.255.255.128 but could no longer
access my router after making the change (I did change my computers subnet).
Does a subnet of 255.255.255.128 create a new range of private IP's?

Thank you

 

[Phillip Windell]

Is it possible to serve webpages through IIS using two seperate nics on two
differnet subnets (using IP addresses)?

Yes, No, Maybe. It just isn't that simple.

If so, how can I create a new subnet using my Linksys? It is presently set
at 255.255.255.0, I tried changing it to 255.255.255.128 but could no

longer

If the Linksys is one of those Cable/DSL Routers then no. Those are NAT
Devices, they are not *real* routers. It is unfortunate that "marketing" has
butchered the dictionary in this area so much. Multiple subnets requires a
real router with multiple LAN Interfaces,...and this has nothing to do with
the Internet or the Device that provides the Internet.

Once you have multiple subnets created, then, *in theory*, you can publish
multiple Sites by using the "static-nat" features of the Internet Sharing
Device (NAT Device). But this may not be as simple as that sounds.

 

[Phil]

Thanks for the reply. I'm using the same subnet mask on my Netscreen
firewall and a Linksys router with two nics and it seems to work fine. I can
access my default page from both IP addresses. I had read somewhere that
using two connections can cause DNS issues as some DNS servers may cache
results. As far as I can tell this should not be a problem considering I've
two nics in my machine.. correct? If someone attempts to send an email to a
failover address it will still arrive, as they are both connected all the
time. I was suprised to see that all of my apps worked fine with two nics,
mail, web etc.

Thank you

 

[Phillip Windell]

Thanks for the reply. I'm using the same subnet mask on my Netscreen
firewall and a Linksys router with two nics and it seems to work fine.

That doesn't have anything to do with it. Every device on a network must
have same Mask or they wouldn't work.

I can
access my default page from both IP addresses. I had read somewhere that
using two connections can cause DNS issues as some DNS servers may cache
results. As far as I can tell this should not be a problem considering I've
two nics in my machine.. correct?

Here are the multihomed issues. It is a lot to read,...will probably keep
you busy for a while:

175767 - Expected Behavior of Multiple Adapters on Same Network
http://support.microsoft.com/default.aspx?scid=kb;EN-US;175767

157025 - Default Gateway Configuration for Multihomed Computers
http://support.microsoft.com/default.aspx?scid=kb;en-us;157025&Product=win2000

272294 - Active Directory Communication Fails on Multihomed Domain
Controllers
http://support.microsoft.com/default.aspx?scid=kb;en-us;272294

191611 - Symptoms of Multihomed Browsers
http://support.microsoft.com/default.aspx?scid=kb;EN-US;191611

Microsoft Windows XP - Multihoming Considerations
http://www.microsoft.com/resources/documentation/windows/xp/all/reskit/en-us/prcc_tcp_qpzj.asp?