Port Number | Protocol | Purpose |
N/A | ARP | HA failover of network interfaces. |
N/A | ICMP | • Server health checks. • execute ping and execute traceroute |
25 | TCP | SMTP for alert email. |
53 | UDP | DNS queries. |
69 | UDP | TFTP for backups, restoration, and firmware updates. See commands such as execute backup or execute restore. |
80 | TCP | Server health checks. |
123 | UDP | NTP synchronization. |
162 | UDP | SNMP traps. |
443 | TCP | • FortiGuard polling. • Server health checks. |
514 | UDP | Syslog. |
6055 | UDP | HA heartbeat. Layer 2 multicast. |
6056 | UDP | HA configuration synchronization. Layer 2 multicast. |
Port Number | Protocol | Purpose |
N/A | ICMP | ping and traceroute responses. |
22 | TCP | SSH administrative CLI access. |
23 | TCP | Telnet administrative CLI access. |
53 | UDP | DNS queries from clients for global load balancing and inbound link load balancing. |
80 | TCP | • HTTP administrative web UI access. • Predefined HTTP service. Only occurs if the service is used by a virtual server. |
161 | UDP | SNMP queries. |
443 | TCP | • HTTPS administrative web UI access. Only occurs if the destination address is a network interface’s IP address. • Predefined HTTPS service. Only occurs if the service is used by a virtual server, and if the destination address is a virtual server. |
6055 | UDP | HA heartbeat. Layer 2 multicast. |
6056 | UDP | HA configuration synchronization. Layer 2 multicast. |