Appendix B: Port Numbers
 
Appendix B: Port Numbers
Communications between the FortiDDoS appliance, clients, servers, and FortiGuard Distribution Network (FDN) require that any routers and firewalls between them permit specific protocols and port numbers.
The following tables list the default port assignments used by FortiDDoS.
Table 88: Default ports used by FortiDDoS for incoming traffic (listening)
Port Number
IP Protocol Number/ Service
Purpose
N/A
ICMP
ping and traceroute responses.
22
TCP
SSH administrative CLI access.
23
TCP
Telnet administrative CLI access.
80
TCP
HTTP administrative web UI access.
161
UDP
SNMP queries.
443
TCP
HTTPS administrative web UI access. Only occurs if the destination address is a network interface’s IP address.
6055
UDP
HA heartbeat. Multicast.
6056
UDP
HA configuration synchronization. Multicast.
Table 89: Default ports used by FortiDDoS for outgoing traffic
Port Number
IP Protocol Number/ Service
Purpose
N/A
ARP
HA failover of network interfaces.
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.
123
UDP
NTP synchronization.
162
UDP
SNMP traps.
443
TCP
FortiGuard polling and update downloads.
514
UDP
Syslog.
6055
UDP
HA heartbeat. Multicast.
6056
UDP
HA configuration synchronization. Multicast.