Need to protect 2-5th level domains how to do it?

Question

linux

Good afternoon,
I have 2-5 level domains, you need to protect them with ssl.
Wildcard only works at level 3.
Tell me how would you solve this problem?

Answer 1

SAN certificate with all necessary domains added.

Answer 2

don't make 4th and 5th level domains...
not enough 3rd level characters??

Answer 3

God, the domain... Level 5? Not enough imagination...
hole.teeth.head.crocodil.ru?

Answer 4

Lets encrypt, how else. Just release for each domain and that's it.
wildcard does not necessarily work third, it can be released both on *.abc.domain.com and *.cba.abc.domain.com and thus close these cases. But most likely you don't have many domains there and the best solution would be LetsEncrypt to issue a certificate for each specific domain.