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Table of Contents

Handbook

Appendix B: Port Numbers

Communications between the FortiADC system, clients, servers, and FortiGuard Distribution Network (FDN) require that any routers and firewalls between them permit specific protocols and port numbers.

Default ports used by FortiADC for outgoing traffic and Default ports used by FortiADC for incoming traffic (listening) list the default port assignments that FortiADC uses for outgoing and incoming traffic, respectively.

Default ports used by FortiADC for outgoing traffic

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.
389 TCP LDAP authentication queries.
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.
 

Default ports used by FortiADC for incoming traffic (listening)

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.

 

Appendix B: Port Numbers

Communications between the FortiADC system, clients, servers, and FortiGuard Distribution Network (FDN) require that any routers and firewalls between them permit specific protocols and port numbers.

Default ports used by FortiADC for outgoing traffic and Default ports used by FortiADC for incoming traffic (listening) list the default port assignments that FortiADC uses for outgoing and incoming traffic, respectively.

Default ports used by FortiADC for outgoing traffic

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.
389 TCP LDAP authentication queries.
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.
 

Default ports used by FortiADC for incoming traffic (listening)

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.