Recently, i have installed a system like this:

-Win2k, IIS, 2 network cards but just one card is configured to DMZ by behind a CISCO PIX (NATed to have a public IP address, this public ip is assigned by my ISP1 to my public domain name)

Everything was OK, but my ISP has failed 3 times this week.

Now, i need to install an alternate communication channel (ISP2) to support my site when my ISP1 is down.

Things that i'm thinking to do:

1-Get an alternate ISP to support my system when my ISP1 is down, connect an ISA Server (cheaper than my PIX) to support my second ISP.
Put my server into a DMZ to the second network card.
2-Get a domain name (www.example.com).
3-Get my own DNSs (ns1 and ns2) to support this domain.
4-Redirect my site to be supported by ns1 and ns2.
5-Add to my own DNS the public IP's, provided by ISP1 and ISP2.

The image is like this:

http://www.microsoft.com/technet/ima...isat12_BIG.gif

The difference is that i won't have an array of ISA in my alternate ISP.


Will it work?

Any suggestions.