Failover DNS involves monitoring one of your resources for availability. If the system detects that your web server, for example, is offline or unreachable, it will automatically update your DNS settings with a new value and direct traffic to a different location.
The following protocols can be monitored:
Checking intervals can be set in various increments, ranging from 15 minutes in DNS standard package to as low as 1 minute at the Enterprise level.
To minimize false positives you can set a threshold for the number of consecutive failures before the system switches the DNS settings. In the case of web requests (HTTP or HTTPS) you can set expected string parameters and fetch a specific web page on your site.
You may not want to automatically rollback to the old configuration once everything is back to normal (in case you need to do some reconciliation work), so you can also set your rollback settings to either automatic or manual.
Our monitoring nodes are deployed around the world, in Toronto, New York City, Amsterdam, Singapore, London UK, Los Angeles, and Tokyo.