One of my clients hosts his own web server with a primary and a failover internet connection:
Lets say our primary IP is 18.104.22.168 and our backup is 22.214.171.124. GoDaddy hosts our name servers so anytime someone wants to go to www.ourdomain.com
a DNS host also known as an A record is setup pointing to 126.96.36.199. This works well enough and people land on our website. However if our internet goes down the IP currently changes to 188.8.131.52 which will break the A record setup on GoDaddy and www.ourdomain.com
will not resolve. The quick fix is to modify the A record on Godaddy to the failover IP. This will get the site back up and running in just a few minutes. This is the short term solution.
Given that DNS does not support IP failover here is the solution I propose. Assign the site the IP 184.108.40.206. This site is a service that monitors 220.127.116.11 and 18.104.22.168. By default it will forward all traffic to 22.214.171.124 however if the site goes down it will automatically failover to 126.96.36.199.
What solutions do you suggest for this type of issue? Currently they are happy hosting on site they just need a way for the IP to failover