Finding the right place.
NAMESERVERS
At your registrar. Always.
For domains with us, the Client Area domain page. For domains elsewhere, that registrar.
DNS RECORDS
Wherever your nameservers point.
Ours: cPanel > Zone Editor.
Cloudflare or another provider: their panel.
HOW TO TELL
A WHOIS lookup shows the nameservers in use.
GLUE RECORDS
At the registrar, under a heading such as register a host or child nameserver.
EMAIL ROUTING
In cPanel, not in DNS. It determines whether the server delivers mail locally or sends it to the MX records.
REVERSE DNS
With us, not in your zone. Open a ticket.
DNSSEC
At the DNS provider for signing, and at the registrar for the DS record. Both.
SUBDOMAINS
In cPanel for the directory and web server configuration, and in DNS for the record.
Both, if DNS is external.
THE RULE THAT PREVENTS MOST MISTAKES
Check your nameservers before editing anything.