I've found many a common question but unfortunately none of them really directly answered my inquiry, below is a copy paste of the info I am provided by xname.org I've replaced my
blah.com, my email with
blah.yahoo.com, and my IP address with
$TTL 86400 ; Default TTL blah.com. IN SOA ns0.xname.org. blah.yahoo.com. ( 2013042110 ; serial 10800 ; Refresh period 3600 ; Retry interval 604800 ; Expire time 10800 ; Negative caching TTL ) $ORIGIN blah.com. IN NS ns1.xname.org. IN NS ns0.xname.org. IN NS ns2.xname.org. IN MX 10 blah.com. blah.com. IN A 18.104.22.168 www. IN CNAME blah.com.
blah.com works but
www.blah.com doesn't. I initially tried to put just plain
www for the cname, but found some reference to adding the trailing dot to it. The other uncertainty I have is whether the
blah.com in "x in cname
blah.com" should have its trailing dot or not.
I know this should be obvious, and perhaps even easy but I cannot find an answer to this anywhere, I did find some solutions suggesting I put
www.blah.com as an A listing pointing to my IP but if I can help it I'd prefer only have my IP listed once as it's a dynamic IP and the fewer places I need to update it when it changes the better.