Consigo gerar um certificado destes?

Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. |, so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: i do not need a domain! (the problem is that!)

I ran this command:

It produced this output:

My web server is (include version): IIs7.5

The operating system my web server runs on is (include version): Windows 10

My hosting provider, if applicable, is:

I can login to a root shell on my machine (yes or no, or I don't know): yes

I'm using a control panel to manage my site (no, or provide the name and version of the control panel):

The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):

Desculpem se não estou no local correto!!
Procurei mas nao encontrei nada parecido ao que necessito!!!
Eu tenho uma aplicação que funciona como pagina web local; Com os novos browsers eu consegui sempre no IIS criar um self-signed certificated e os browsers, depois de instalado o certificado não davam erro.
Agora a coisa de umas semanas, deve ser com as atualizações, aparece um erro ERR_CERT_COMMON_NAME_INVALID e só fazendo alguns passos é q se consegue chegar à pagina!!

A aplicação trabalha localmente através do nome da maquina (logo não acho que faça sentido o dominio), consigo resolver esta situação com o lets encrypt?
A aplicação pode e está instalada em vários computadores! É possível gerar um certificado geral que funcione em todas as maquinas? ou terá de ser um certificado para cada instalação?

Muito obrigado e desculpem a minha ignorância

Let's Encrypt only issues certificates for domain names and as Let's Encrypt is a publicly trusted CA, those domain names can also only be publicly available domain names.

Please see Certificates for localhost - Let's Encrypt for more information about certs for localhost.


Hi @Elio, and welcome to the LE community forum :slight_smile:

Then you are trying to get a certificate from the wrong CA.
LE only provides DV [Domain Validated] certificates.
Getting one without a domain name is impossible.
That said, you don't need to own the domain.
Many people use free DDNS names to obtain free certificates.
But it must be an FQDN that can be validated via global Internet DNS.

Step #1: Get a valid FQDN.


:frowning: i.. many thanks, i will try to understand the FQDN!!!
I am trying with some portoguese companys and they can not understand what i need!!
thanks, i will talk with them about FQDN!

1 Like

What do you mean by "trying"? Perhaps you're asking an incorrect question.

As said, there are free services available which can provide you with a free FQDN.


Can you help me? I think i have an idea..
Can you help me to create a Certificate to our domain? like:
this can be done?
What i need to do?

Question #1: Do you have access to that DNS zone?
[Can you make any entries in it OR can you have someone else make entries for you?]

Question #2: Will anyone be accessing that name from the Internet?


#1 Yes i have DNS access
#2 No.. it always works on the intranet! (not internet ok?!)

OK, based on your answers, it seems that DNS-01 authentication is the best fit.
That said, it really depends on the DSP [DNS Service Provider] for full automation.

Using DNS-01 authentication is beneficial because it can be done from any system that has Internet access.
But it can be complicated to automate; And near impossible to automate when the DSP doesn't support DNS updates via API.

Question #3a: Who is the DSP (for that domain)?
3b: And does it allow for DNS updates via API?


Hi.. sorry but i think that i can set a certificate for
and in the computer hosts file set the internal IP address and it works!!
Can you help me create a Certificate to

many thanks

1 Like

I've been trying to do that.

Question #3: Who is the DNS Service Provider (for your domain)?


Seems to be No-Ip.


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