Ok so what is the certificate proveided when you type this url in your browser : https://domain.tld:8448/_matrix/client ?
synapse is installed under my.domian.tld
Here i get for https://my.domian.tld:8448/_matrix/client
„No Such Resource“
the riot client in installed under riot.domain.tld
Here i get for https://riot.domian.tld:8448/_matrix/client
„The connection is not save“
It’s normal that you have a “No Such resource”. The question is what type of certificate do you get ?
https://my.domian.tld:8448/_matrix/client just gives me
No Such Resource
Sorry. No luck finding that resource.
YES i do
So if you go at this url https://my.domian.tld:8448/_matrix/client , and you see which type of certificate do you have what is the result ? Do you get a certificat signed by let’s encrypt ?
on https://my.domain.tld:8448/_matrix/client I see the certificat signed by let’s encrypt
on https://riot.domain.tld I see the certificat signed by let’s encrypt
on https://riot.domain.tld:8448/_matrix/client I DON´T see the certificat signed by let’s encrypt
So in this case there are no reason that you get an error about your certificate for the federation
So maybe the testing software at https://www.arewereadyyet.com/ is not working right?
But like I said I can´t federate with servers from the list:
This servers get mostly a green light at arewereadyyet.com
Josue could you name me an account on an other server I could try to federate with which has installed your yunohost synapse testing version?