Standard Ports

Standard ports and services(ilustrative table)

Port	Name Service	Description
1	tcpmux	Multiplexor TCP
5	rje	Remote Job Entry
7	echo	Echo protocol
9	discard	Discard Protocol
11	systat	System Ports Information
13	daytime	Hour and date Protocol
17	qotd	Quote of the day
18	msp	Protocol to Send Messages
19	chargen	Send Infinity String
20	ftp-data	Transfer FTP data
21	ftp	File Transfer Protocol
22	ssh	Secure Shell
23	telnet	Telnet Service
25	smtp	Simple Mail Transfer Protocol
37	time	Time Protocol
39	rlp	Resource Location Protocol
42	nameserver	Name Service
43	nickname	Whois Service Directory
49	tacacs	Terminal Access Controller Access Control System
50	re-mail-ck	Remote Mail Verification Protocol
53	domain	DNS Domain Name System
63	whois++	Extended Whois Services
69	bootps	BootStrap Protocol Server
70	bootpc	BootStrap Protocol Client
71	tftp	Trivial File Transfer Protocol
80	http	Hypertext Transfer Protocol
88	kerberos	Authentication Agent
95	supdup	Protocol Extension
101	hostname	Host Name Service on SRI-NIC Machines
107	rtelnet	Remote Telnet
109	pop2	Post Office Protocol
113	auth	Outdated Authentication System
115	sftp	Simple File Transfer Protocol
123	ntp	Time Synchronization Protocol
137	netbios-ns	NetBIOS Name Service
138	netbios-dgm	NetBIOS Datagram Forwarding Services
139	netbios-ssn	Session Service
161	snmp	Simple Network Management Protocol
443	https	HTTPS/SSL Hypertext Transfer Protocol + Socket Security Layer
520	rip	Routing Information Protocol
587	smtp	Simple Mail Transfer Protocol over TLS
995	imaps	IMAP4 over SSL