ISP redundant connections when hosting web servers

[jcowtan]

My customer has two ISP providers and is now looking at how each can back up the other in case of failure. One is a fiber link, the other wireless.

The company hosts its own webservers in a DMZ.

One provider hosts their DNS ands I think that function should move inside. However, I can not get my arms around how they would move over to the other ISP in case of failure.

Going out I think is simple. An alternate path with a high admin distance should do teh trick.

BUT, how do the remote users accessing the webserver applications get routed through the alternate ISP link?

Are we talking BGP?

Any guidence?

[pedersen]

Hi,

The DMZ IP Range are the public or Private, do you make static(NAT) entrys in your firewall to convert a Public to a private IP?

The way i see it, both ISP must use BGP, and be able to route the IP net for the Web-servers, when that is done you can make BGP-Wight on the prefered link, if the Link fails, then there is an altertive route though the other ISP

-Anders.