See if these steps describe the situation you are seeing: You ran a query against a DNS record (‘A’ record, for example) via your ISP (or other recursive DNS provider) and received no response (e.g. a NXDOMAIN, Non-existent domain or similar.) You realized that the record did not exist in your zone, which is why […]
How does DNS failover handle cached entries around the world? If my site fails over, will people who have been visiting my site still be able to using the new IP?
Dealing with a DNS cache is probably the largest challenge of a DNS failover service. Even when setting the TTL for your ‘A’ record to a very low number, certain ISPs or networks just like to ignore those TTLs and elect to set the cache for a value that they deem appropriate. AOL is a prime […]