Posts Tagged ‘cname’

DNS time-to-live settings for CNAME records

Monday, May 10th, 2010

CNAME sounds like something worth looking into …

The DNS CNAME is one of the most versatile tools in an IT administrator’s arsenal. One caveat to reaching the full potential of a CNAME is default TTL. IT pro Rick Vanover explains situations to lower the default TTL.
I’ve long thought that the DNS CNAME is one of the most underrated infrastructure technologies considering it has been available for a very long time. Simply put a DNS CNAME is an alias record that points a user-created fully qualified domain name (FQDN) to an existing FQDN. I did a post a few years ago how using the CNAME for a database’s ODBC connection is a great way to accommodate a server move without touching the application or server.