Setup hostname with multiple IPs

[Rohdem]

Hi,
I know just enough about DNS to get by, so please forgive me if this is a novice question. Our company has a firewall with 2 external IP's from 2 different ISPs. This provides redundancy to our internet users in case on of the ISPs has issues. We also have a webserver behind the firewall that the firewall routes web traffic too. I want the domain that we use for this webserver to point to both IP addresses in case on of them is down. I.E. Someone typing

http://www.mycompany.com

in to their browser....it will try 1 ip address, then the other if the first one does not work. Is this even possible to do with DNS? Our DNS is hosted by a web hosting provider, but I am able to make changes to it through a web interface.

Thanks!
Mike

 

[elgrandeperro]

You can have them both, but the browser will only try the first one...it has no provision for "retrying".

Generally, DNS servers can be configured to "round robin" so that it alternates which is first. The general problem is that if one ISP goes down, you are going to lose half your traffic! So now instead of being better connected, you now have to rely on both paths being up.