Sub-sub domain support?


#1

Hello,

Sorry if this has been answered before, but I can’t seem to find any information about it.

Do Let’s Encrypt support sub-sub domain support (e.g. example.subdomain.domain.com)?

Thanks,
Ashley.


#2

Yep, it definitely does.


#3

I’m not sure if LE will even care if you try to sign a TLD, but sub-sub-etc-domains are simply more strings that the certificate is valid for. :slight_smile: It’ll sign anything you tell it to as long as you can verify access to it.


#4

It wont assign “anything” because Let’s Encrypt does not support Wildcard SSL’s at the moment.


#5

Well, yes, anything specific you list for it. Wildcards are a special case, even for other signers.


#6

Let’s Encrypt supports subdomains, definitely. But it definitely doesn’t support wildcards.

However Let’s Encrypt will provide you TLS certs for any domain you demonstrate control of. LE currently isn’t ideal as a commercial option. If you want wildcard support, you’d currently be better off with a commercial option.

Currently, LE has a limit of 20 domains per week. This is fine for home users, but if you’re a business, probably isn’t enough.


#7

No, the limit is 20 certs per domain per week.


#8

You can have 100 subdomains on a single cert. So you can effectively get 2000 names spread over 20 certs and then use SNI to pick the cert that matches the request.