In DNS parlance, an A record is used to point a hostname to an IP address. For example, your web server might have an IP address of
10.42.1.21. If you want the hostname "webserver" to point to this address, you would use an A record in the zone file for your domain.
A BIND format A record looks like this:
webserver IN A 10.42.1.21
Adding A records to your Dreamhost-hosted DNS domain
|Please note that if your domain is set to fully hosted and you add a blank or www A record, you will experience intermittent success as your domain is now juggling between two different A records. You will need to set your domain to "Host DNS only!" if you want just the custom A record to work.|
This can be useful if you run servers outside of Dreamhost and you would like to give those machines names in your existing domain.
If you would like all subdomains (even ones you did not create) to point to an ip address, set the NAME to be *.yourdomain.com. You can modify the httpd.conf on the destination machine to reroute subdomains to specific folders.