DNS & core network ports

DNS, encrypted DNS and the core network/infrastructure protocols — resolution, time, routing, logging and discovery.

12 ports in this category

Port	Service	Transport
53	DNS (Domain Name System)	tcp, udp
67	DHCP (Dynamic Host Configuration Protocol) server	udp
111	RPCbind (portmapper)	tcp, udp
123	NTP (Network Time Protocol)	udp
161	SNMP (Simple Network Management Protocol)	udp
179	BGP (Border Gateway Protocol)	tcp
514	Syslog	udp
520	RIP (Routing Information Protocol)	udp
853	DNS over TLS (DoT)	tcp
3702	WS-Discovery (Web Services Dynamic Discovery / WSD)	udp
5353	mDNS (Multicast DNS)	udp
5355	LLMNR (Link-Local Multicast Name Resolution)	udp

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