One of my clients hosts his own web server with a primary and a failover internet connection:
Lets say our primary IP is 188.8.131.52 and our backup is 184.108.40.206. 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 220.127.116.11. This works well enough and people land on our website. However if our internet goes down the IP currently changes to 18.104.22.168 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 22.214.171.124. This site is a service that monitors 126.96.36.199 and 188.8.131.52. By default it will forward all traffic to 184.108.40.206 however if the site goes down it will automatically failover to 220.127.116.11.
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