Job for nginx.service failed because the control process exited with error code. See "systemctl status nginx.service" and "journalctl -xe" for details.
 

[root@localhost ~]# certbot certonly --webroot -w /home/site1/master/public -d site1.imiso.net
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org
Obtaining a new certificate
Performing the following challenges:
http-01 challenge for site1.imiso.net
Using the webroot path /home/site1/master/public for all unmatched domains.
Waiting for verification...
Cleaning up challenges
Failed authorization procedure. site1.imiso.net (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: Fetching http://site1.imiso.net/.well-known/acme-challenge/yYe17ko-GleOLKOqgJentZwDUnRiMlfkWK70gt1nHys: Connection refused

IMPORTANT NOTES:
 - The following errors were reported by the server:

   Domain: site1.imiso.net
   Type:   connection
   Detail: Fetching
   http://site1.imiso.net/.well-known/acme-challenge/yYe17ko-GleOLKOqgJentZwDUnRiMlfkWK70gt1nHys:
   Connection refused

   To fix these errors, please make sure that your domain name was
   entered correctly and the DNS A/AAAA record(s) for that domain
   contain(s) the right IP address. Additionally, please check that
   your computer has a publicly routable IP address and that no
   firewalls are preventing the server from communicating with the
   client. If you're using the webroot plugin, you should also verify
   that you are serving files from the webroot path you provided.
[root@localhost ~]# 
 

ssl관련 오류인건 같은데