Hestia CP is a free open-source control panel for Debian and Ubuntu amd64 systems.
An open-source Linux web server control panel.
POP/IMAP/SMTP mail services with Anti-Virus, Anti-Spam, and Webmail (ClamAV, SpamAssassin, and Roundcube)
Let's Encrypt SSL support with wildcard certificates
Firewall with brute-force attack detection and IP lists (iptables, fail2ban, and ipset).
Hestia Control panel is based on VestaCP
Hestia Control Panel is licensed under GPL v3 license, and is based on the VestaCP project.