important port numbers

important port numbers– 1

Port Description status 0/TCP,UDP Reserved; do not use (but is a permissible source port value if the sending process does not expect messages in response) Official
Port no / Protocol ::: Application
Port: 1 /TCP,UDP ::: TCPMUX (TCP port service multiplexer) Official
Port: 5 /TCP,UDP ::: RJE (Remote Job Entry) Official
Port:7 /TCP,UDP ::: ECHO protocol Official
Port:9 /TCP,UDP ::: DISCARD protocol Official
Port:11 /TCP,UDP ::: SYSTAT protocol Official
Port:13 /TCP,UDP ::: DAYTIME protocol Official
Port:17 /TCP,UDP ::: QOTD (Quote of the Day) protocol Official
Port:18 /TCP,UDP ::: Message Send Protocol Official
Port:19 /TCP,UDP :::: CHARGEN (Character Generator) protocol Official
Port:20 /TCP :::: FTP – data port Official
Port:21 /TCP :::: FTP – control (command) port Official
Port:22 /TCP,UDP ::: SSH (Secure Shell) – used for secure logins, file transfers (scp, sftp) and port forwarding Official.

Importantant port numbers used in computer networking part 2

Port no:/ Protocol :::: Application
23/TCP,UDP ::::: Telnet protocol – unencrypted text communications Official
25/TCP,UDP :::: SMTP – used for e-mail routing between mailservers E-mails Official
26/TCP,UDP :::: RSFTP – A simple FTP-like protocol Unofficial
35/TCP,UDP ::::: QMS Magicolor 2 printer Unofficial
37/TCP,UDP ::::: TIME protocol Official
38/TCP,UDP ::::: Route Access Protocol Official
39/TCP,UDP :::: Resource Location Protocol Official
41/TCP,UDP ::::: Graphics Official
42/TCP,UDP ::::: Host Name Server Official
43/TCP ::::::WHOIS protocol Official
49/TCP,UDP ::::: TACACS Login Host protocol Official
53/TCP,UDP :::::: DNS (Domain Name System) Official
57/TCP :::::: MTP, Mail Transfer Protocol
67/UDP ::::::: BOOTP (BootStrap Protocol) server; also used by DHCP (Dynamic Host Configuration Protocol) Official
68/UDP :::::: BOOTP client; also used by DHCP Official
69/UDP :::::: TFTP (Trivial File Transfer Protocol) Official
70/TCP :::::: Gopher protocol Official 79/TCP Finger protocol Official
80/TCP :::::: HTTP (HyperText Transfer Protocol) – used for transferring web pages Official
81/TCP :::::: HTTP Alternate (HyperText Transfer Protocol) Official
81/TCP :::::: Torpark – Onion routing ORport Unofficial
82/UDP :::::::: Torpark – Control Port Unofficial
88/TCP ::::: Kerberos – authenticating agent Official
101/TCP ::::::: HOSTNAME 102/TCP ISO-TSAP protocol
107/TCP ::::::: Remote Telnet Service
109/TCP :::::: POP, Post Office Protocol, version 2
110/TCP ::::::: POP3 (Post Office Protocol version 3) – used for retrieving E-mails.

Important port numbers :3

Port number : Protocol :::: Aplication
111: TCP,UDP :::; SUNRPC protocol
113: TCP :::: ident – old server identificationsystem still used by IRC servers to identify its
115: TCP :::::SFTP, Simple File Transfer Protocol
117: TCP ::::::UUCP-PATH
118: TCP,UDP ::::::SQL Services
119: TCP ::::::::NNTP (Network News Transfer Protocol)
- used for retrieving newsgroups messages
123: UDP :::::NTP (Network Time Protocol) – used for time
135: TCP,UDP ::::::EPMAP / Microsoft RPC Locator Service
137: TCP,UDP :::::: NetBIOS NetBIOS Name Service
138: TCP,UDP ::::::NetBIOS NetBIOS Datagram Service
139: TCP,UDP ::::::NetBIOS NetBIOS Session Service
143: TCP,UDP:::::: IMAP4 (Internet Message Access Protocol 4)
used for retrieving E-mails
152: TCP,UDP ::::::BFTP, Background File Transfer Program
153: TCP,UDP ::::::SGMP, Simple Gateway Monitoring Protocol
156: TCP,UDP ::::::SQL Service
158: TCP,UDP ::::::DMSP, Distributed Mail Service Protocol
161: TCP,UDP::::: SNMP (Simple Network Management Protocol
162: TCP,UDP ::::: SNMPTRAP
170: TCP :::::::Print-srv
179: TCP ::::::BGP (Border Gateway Protocol)
194: TCP :::::IRC (Internet Relay Chat)
201/TCP,UDP :::::: AppleTalk Routing Maintenance