DNS configuration

Hi All
This may be a silly question so please forgive me, I haven't set-up a DNS in a while and I know I have forgotten something simple in my configuration.
I have set up an Xserver 10.5.6 with a fully qualified domain name for example:
mydomain.com
machine name: ho.mydomain.com
For some reason I am unable to access the external hosted web site without www (https://mydomain.com) on the internal network.
From out side I can access the external hosted site with or without www, so my external hosting configuration is correct.
What simple thing have i missed in DNS configuration my configuration?
Primary Domain:
mydomain.com
www. machine (external ip address of web host)
ho machine (server ip address)
Please help, what have I forgotten to do?

Hi,
I think you want to replace
www. machine (external ip address of web host)
with
A record mydomain.com -> external IP
This sends an external request outside and comes back in;
that way you can reach either www.mydomain.com or mydomain.com
Ensure you have an alias record in the website setup for the www.
HTH,
Harry

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