1

Id like to create a CNAME-Entry in strato.de

This is the warning i have:

enter image description here

The meaning is "The Server name must end with a point after the top-level domain".

I used xxx.googlehosted.com. and it works great!

But why? Is a absolute-servername always ending with a dot?

Funny thing, i noticed https://www.google.com./search?site=&q=test works great!

Grim
  • 135
  • 7
  • A very informative community discussion can be found on this superuser question. Do check it out: https://superuser.com/questions/1467958/why-does-putting-a-dot-after-the-url-remove-login-information – BhaveshDiwan Sep 29 '21 at 23:05

1 Answers1

3

FQDNs consist of a hierachy of subdomains or labels. The individual labels are delimited by a dot.

The top level domain is actually not the TLD, but the DNS root domain, which is nameless, hence just the dot. Next comes the TLD, like .com .net .de, etc. Then come more levels of subdomains.

A different way of looking at it is that the subdomain to the right site of the dot has authority over the subdomain to the left site of the dot. So the DNS root domain has authority over the TLDs, then the TLDs have authority over what most people call 'the domain' (like .google), and then the entity that owns that domain has authority over the subdomains (.mail.google), and so on.

See wikipedia for more:

https://en.wikipedia.org/wiki/Domain_name#Domain_name_syntax

mzhaase
  • 3,798
  • 2
  • 20
  • 32