A third party has asked me to setup a new subdomain and point it too sub.theirdomain.com. Apparently I can do this with a single CNAME record. Although I set it up over 24 hours ago, it doesn't seem to be resolving. Here's the entry I made:
sub.mydomain.com. IN CNAME sub.theirdomain.com.
Does that look OK?
The host is Webmasters, and I asked their helpdesk who thought it was fine.
The only way I know that it isn't resolving is that when I surf to sub.mydomain.com I get a server not found error. What tools should I be using to diagnose further?
Any you can see, I'm no DNS expert, so any assistance is much appreciated!