Need to give one ip for internet users

[bijupadmanabh]

Server need to acces from out side :: 192.168.1.2

Public IP Address Assigned by NAT :: 220.225.36.8 from one ISP( WAN !)

                                                        124.25.86.9   FRom another ISP(WAN 2)

Problem Facing ::  Internet USers (( Acessing the server by these IP but one link goes down( Our side ) They have to change the IP Manualy in their          application

Wanted  to give : one ip for the user , If one Link goes down in Our side the trafic should come through other No need to change the IP manually

So kindly Provide me a solution

Biju.A

[Jon Marshall]

If they access by IP address you can't make this work.

If they access by DNS name and there are 2 links coming into your site then as s-moriarty said a GSS would do the job because it can dynamically hand out a different IP for the same DNS name based on the availability of the IP address.

Edit - you do still need a load-balancer which informs the GSS of the availability of the IP address. As Paolo points out this would be an expensive solution but it depends on your budget/requirements.

You can still face problems with DNS caching though so it is not fullproof.

Jon

[paolo bevilacqua]

You don't need GSS for dynamically built DNS replies, that is something any linux scripter can do.

Problem is that probably the customer will want the magic box in their house, that in turn poses the problem of which address to use to reach it, so you're back to square one in vicious loop.

Bottom line: if you want redundancy, either spend big money for BGP, or bring the servers to an hosting center.

[Jon Marshall]

Paolo

You don't need GSS for dynamically built DNS replies, that is something any linux scripter can do.

Agreed but the GSS does a whole lot more and to be fair you have often argued for using professional solutions which i'm not sure a linux script is.

Problem is that probably the customer will want the magic box in their house, that in turn poses the problem of which address to use to reach it, so you're back to square one in vicious loop.

Totally agreed and something i overlooked (+5). The GSS would indeed need to be hosted offsite for it to function as intended so you are looking at some offsite hosting service for the GSS at least.

Jon