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UDP Ports

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Tim Chappell edited this page Oct 10, 2026 · 1 revision

The list of IPv6 UDP ports which will always be tested, and their common usage is defined in the table below:

Port Number	Description of the traffic usually assigned to this port
53	DNS
69	TFTP
123	NTP
161	SNMP
500	IKE
521	RIPng
547	DHCPv6
1900	UPnP (SSDP)
3503	LSP Ping
4500	IKE-NATT
5060	SIP
11211	memcache (ASCII and binary)