If the internal website is bound to the company's second-level domain name, is it not secure?

for example, the company website is A.com, and there is a crm management system inside
. Is it easy to cause attacks and not very secure if you bind crm.A.com,?
is it accessed directly through ip? Or change to another domain name

Mar.16,2021

if you bind a second-level domain name directly, then what if is scanned.

since it is an intranet, you can reverse it directly. The easiest way to do this is to change to hosts , or Nginx and so on.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1bdb264-3123d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1bdb264-3123d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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