Hey Fellas, I am thinking on this perspective need some help on this. Please guide me if I am wrong or let me know if I can achieve the stuff
1. I have a firewall with TWO ISP links, lets assume ISP1 and ISP2. And then I have internal webserver www.foobar.com with IP 192.168.1.10 2. I have natted 192.168.1.10 with ISP1 and ISP2 Public IP addresses 1.1.1.1 [ISP1] ======> 192.168.1.10 Port 80 2.2.2.2 [ISP2] ======> 192.168.1.10 Port 80 3. NS server for foobar.com is on Internet lets assume ns.xyz.com. Added a sub-domain www.foobar.com 4. Now this sub-domain with www.foobar.com is on BIND server and kept it in my network say IP 192.168.1.20 which is again natted with Public IP addresses for ISP1 [1.1.1.10] and ISP2 [2.2.2.20] 5. So, if both the links are up, client coming on either of the link would get both the IP addresses 6.Assume if ISP1 goes down, client coming on ISP1 would never be able to reach; hence as per DNS protocol will try for another link and come on ISP2 and then probably get an IP address of Link 2 i.e. 2.2.2.2. 7. I am sure in this case he would get both the IP addresses even if he is coming from other link; that's what puzzles me or wondering if I can return only IP of ISP2 in case of IPS1 is down? That way I achieve HA or loadbalance?
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