Set up a domain?

Question

Web development

I registered a domain on the free service cu.cc:
fak3.cu.cc
you can edit the zone through the web interface I
want to make a subdomain sub.fak3.cu.cc so that its server responds to its requests (there is a host with an external ip and dns server bind)
I read here how to configure the server, but I don’t understand how this can be done through the web interface

Answer 1

The web interface is different everywhere, so there is no single instruction.
In general, you have one of two options:
Create a subdomain sub and associate it with the host's ip address. This is the "A" entry. Most likely, you will have some kind of sign in the interface, with a form where you can select
sub A 77.88.21.3
, perhaps they will let you specify the lifetime of the domain (how often the provider's DNS servers will have to contact NS cu.cc for information updates by your domain). Sometimes (quite rarely) they give a piece of the NS configuration file to edit through the form. There, you need a similar text (it is unlikely that you will be allowed to edit the config completely, including setting the zone itself).
The second option (since you mentioned your own Bind), you register through the web interface
ns1 - your NS server 1
ns2 - your NS server 2
and already on it you raise the zone and set up the subdomain.

Answer 2

It is clear that it is interesting for oneself and useful for general development, but can it be easier and more stable through free services (like pdd.yandex.ru/help/section9/#dns )?

Answer 3

sorry everyone - it turns out that I configured everything correctly, only UDP port 53 was closed =)