There are 3 restrictions regarding the DP Cell Manager hostname.
If these restrictions are not followed, there will be issues with the certificate creation.
Please take this into consideration before installing the product.
Hostname and domain components must start with a letter:
Certificate generation is done by the Oracle Java Security Tools (which we use in DP).
The Oracle Java Security Tools insists on strict follow of RFC 952 standard when checking for host names and domain components.
The RFC 952 insists that first character of hostname and every domain component must be letter. This is changed in RFC 1123.
There is already a request to relax the hostname handling in Oracle Java Tools to comply with the RFC 1123, but it is not resolved yet.
Hostname with underscore:
As described in RFC-0952, host names may only consist of:
A "name" (Net, Host, Gateway, or Domain name) is a text string up
to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus
sign (-), and period (.). Note that periods are only allowed when
they serve to delimit components of "domain style names".
Hostname longer than 15 characters:
Windows does not permit computer names that exceed 15 characters.