To provide security on a network, you can deploy firewalls within your network architecture. Port numbers are used for creating firewall rules and to uniquely identify a transaction over a network by specifying the host and the service.
The following list shows the minimum ports required for creating firewall rules that allow full functionality of the appliance:
Inbound Ports
icmp/0-65535 (PING)
tcp/1920 (EM)
tcp/215 (BUI)
tcp/22 (SSH)
udp/161 (SNMP)
Outbound Ports
tcp/80 (WEB)
tcp/443 (SSL WEB)