I tried to search for a solution. I tried the following, which all do not work.
Trying to poke the port:
telnet my.cloudron.example 222 -> unable to connect
open terminal from my cloudron of paperless and trying
sftp -P email@example.com@my.cloudron.space --Connection reset by 111.222.333.111 port 222
Here I used the password I've setup within cloudron under Profile/App Passwords -> paperleass.cloudron SFTP Only
My instance runs on contabo. I don't use cloudflare. What else can I check? I did not find information about turning sftp on? I restarted the sftp service in cloudron, its running fine.
telnetcommand was the right approach to test basic connectivity. So most likely there is some firewall setup blocking port 222 on your server. Is there some other external firewall or route based access control setup in contabo for port 222?
@timka Could it be your client network issue ?
Just to double check, you can also do something like this:
docker inspect sftp | grep IPAddress. This will give an IP address like
172.18.0.2. Then, on the server itself, try
telnet 172.18.0.2 22(port 22). Does that work?