try to login with ssh to the remote machine, it will show the fingerprints. If it is ED25519 with SHA256 then type in at the remote machine:
sh-keygen -lf /etc/ssh/ssh_host_ed25519_key.pub
Source: the
apt update apt install prosody set the servers ip address for chat.example.org, conference.chat.example.org and upload.chat.example.org allow firewall for port 5222 tcp for client connections allow firewall for port 5269 tcp for connections from other servers allow firewall for port 5281 tcp for file uploads allow firewall for port 80 tcp apt install certbot certbot certonly --standalone register and enter chat.example.org conference.chat.example.org upload.chat.example.org nano /etc/prosody/prosody.cfg.lua nano /etc/letsencrypt/renewal-hooks/deploy/prosody.sh fill in #!/bin/sh /usr/bin/prosodyctl --root cert import /etc/letsencrypt/live my workaround to force import of certificates: certbot renew --force-renew --deploy-hook "prosodyctl --root cert import /etc/letsencrypt/live" uncomment VirtualHost "localhost" add VirtualHost "chat.example.org" save and exit Ctrl+X y ENTER systemctl reload prosody ... apt install coturn https://prosody.im/doc/coturn