Services

There are many services that can be running on a system. Here are some of the most popular services.

Services Table

Keep in mind that services may run on ANY port. It is just common to find these services on these ports.

Port	Type	Common Usage
21	TCP	FTP
22	UDP/TCP	SSH
23	TCP	Telnet
25	TCP	SMTP
42	TCP/UDP	Windows Internet Name Service
53	TCP/UDP	DNS
67	UDP	DHCP Server
68	UDP	DHCP Client
69	UDP	TFTP
80	TCP	HTTP
111	TCP	rpcbind/portmapper
110	TCP	POP3
119	TCP	Network News Transfer Protocol
123	TCP	Network Time Protocol
135	TCP/UDP	Microsoft RPC
137	TCP/UDP	NetBIOS Name Service
138	TCP/UDP	NetBIOS Datagram Service
139	TCP/UDP	NetBIOS Session Service
143	TCP/UDP	IMAP
161	TCP/UDP	SNMP
389	TCP/UDP	Lightweight Directory Access Protocol
443	TCP/UDP	HTTPS
445	TCP	SMB
500	UDP	IPsec
636	TCP/UDP	Lightweight Directory Access Protocol over SSL
873	TCP	Remote File Synchronization Protocol
993	TCP	IMAPS
995	TCP	POP3S
1433	TCP	MSSQL
3306	TCP	MySQL
3389	TCP	RDP
4555	TCP	RSIP
5800	TCP	VNC Web Interface
5900	TCP	VNC Remote Desktop
6379	TCP	redis