All ports below need to be open in the outbound direction. No port forwards (DNAT) need to be
created for inbound traffic.
- 22 TCP ssh
- 80 TCP http
- 123 UDP ntp
- 443 TCP https
- 5831 TCP portapt
- 5832 TCP portapt
- 11371 TCP pgp public key server (http://www.speedguide.net/port.php?port=11371)
- 31767 TCP zabbix (monitoring)
- 42873 TCP rsync
