my cheat sheet most common tcp/udp ports

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1 /etc/services

This is just the most commonly known/used ports from /etc/services

  • daytime 13/udp # Daytime (RFC 867)
  • daytime 13/tcp # Daytime (RFC 867)
  • ftp-data 20/udp # File Transfer [Default Data]
  • ftp-data 20/tcp # File Transfer [Default Data]
  • ftp 21/udp # File Transfer [Control]
  • ftp 21/tcp # File Transfer [Control]
  • # Jon Postel <postel@isi.edu>
  • ssh 22/udp # SSH Remote Login Protocol
  • ssh 22/tcp # SSH Remote Login Protocol
  • # Tatu Ylonen <ylo@cs.hut.fi>
  • telnet 23/udp # Telnet
  • telnet 23/tcp # Telnet
  • # Rick Adams <rick@UUNET.UU.NET>
  • smtp 25/udp # Simple Mail Transfer
  • smtp 25/tcp # Simple Mail Transfer
  • time 37/udp # Time
  • time 37/tcp # Time
  • tacacs 49/udp # Login Host Protocol (TACACS)
  • tacacs 49/tcp # Login Host Protocol (TACACS)
  • xns-time 52/udp # XNS Time Protocol
  • xns-time 52/tcp # XNS Time Protocol
  • # Susie Armstrong <Armstrong.wbst128@XEROX>
  • domain 53/udp # Domain Name Server
  • domain 53/tcp # Domain Name Server
  • # E. Wald <ewald@via.enet.dec.com>
  • whois++ 63/udp # whois++
  • whois++ 63/tcp # whois++
  • # Kathy Huber <khuber@bbn.com>
  • sql*net 66/udp # Oracle SQL*NET
  • sql*net 66/tcp # Oracle SQL*NET
  • # Jack Haverty <jhaverty@ORACLE.COM>
  • bootps 67/udp # Bootstrap Protocol Server
  • bootps 67/tcp # Bootstrap Protocol Server
  • bootpc 68/udp # Bootstrap Protocol Client
  • bootpc 68/tcp # Bootstrap Protocol Client
  • # Bill Croft <Croft@SUMEX-AIM.STANFORD.EDU>
  • tftp 69/udp # Trivial File Transfer
  • tftp 69/tcp # Trivial File Transfer
  • # Christopher Leong <leong@kolmod.mlo.dec.com>
  • finger 79/udp # Finger
  • finger 79/tcp # Finger
  • # David Zimmerman <dpz@RUTGERS.EDU>
  • http 80/udp www www-http # World Wide Web HTTP
  • http 80/tcp www www-http # World Wide Web HTTP
  • # Tim Berners-Lee <timbl@W3.org>
  • hosts2-ns 81/udp # HOSTS2 Name Server
  • hosts2-ns 81/tcp # HOSTS2 Name Server
  • # Earl Killian <EAK@MORDOR.S1.GOV>
  • xfer 82/udp # XFER Utility
  • xfer 82/tcp # XFER Utility
  • # Kevin Murphy <murphy@sevens.lkg.dec.com>
  • pop2 109/udp # Post Office Protocol - Version 2
  • pop2 109/tcp # Post Office Protocol - Version 2
  • # Joyce K. Reynolds <jkrey@isi.edu>
  • pop3 110/udp # Post Office Protocol - Version 3
  • pop3 110/tcp # Post Office Protocol - Version 3
  • # Martin Forssen <maf@dtek.chalmers.se>
  • sftp 115/udp # Simple File Transfer Protocol
  • sftp 115/tcp # Simple File Transfer Protocol
  • # Mark Lottor <MKL@nisc.sri.com>
  • sqlserv 118/udp # SQL Services
  • sqlserv 118/tcp # SQL Services
  • # Larry Barnes <barnes@broke.enet.dec.com>
  • nntp 119/udp # Network News Transfer Protocol
  • nntp 119/tcp # Network News Transfer Protocol
  • # Pierre Arnaud <pierre.arnaud@iname.com>
  • ntp 123/udp # Network Time Protocol
  • ntp 123/tcp # Network Time Protocol
  • # Larry Peterson <llp@ARIZONA.EDU>
  • netbios-ns 137/udp # NETBIOS Name Service
  • netbios-ns 137/tcp # NETBIOS Name Service
  • netbios-dgm 138/udp # NETBIOS Datagram Service
  • netbios-dgm 138/tcp # NETBIOS Datagram Service
  • netbios-ssn 139/udp # NETBIOS Session Service
  • netbios-ssn 139/tcp # NETBIOS Session Service
  • # Susie Snitzer <—none—>
  • imap 143/udp # Internet Message Access Protocol
  • imap 143/tcp # Internet Message Access Protocol
  • # Albert G. Broscius <broscius@DSL.CIS.UPENN.EDU>
  • sql-net 150/udp # SQL-NET
  • sql-net 150/tcp # SQL-NET
  • # Sergio Heker <heker@JVNCC.CSC.ORG>
  • sqlsrv 156/udp # SQL Service
  • sqlsrv 156/tcp # SQL Service
  • # Marty Schoffstahl <schoff@NISC.NYSER.NET>
  • snmp 161/udp # SNMP
  • snmp 161/tcp # SNMP
  • snmptrap 162/udp # SNMPTRAP
  • snmptrap 162/tcp # SNMPTRAP
  • # Leo Hourvitz <leo@NEXT.COM>
  • bgp 179/udp # Border Gateway Protocol
  • bgp 179/tcp # Border Gateway Protocol
  • # Ted J. Socolofsky <Teds@SPIDER.CO.UK>
  • irc 194/udp # Internet Relay Chat Protocol
  • irc 194/tcp # Internet Relay Chat Protocol
  • # Chuck Spitz <spich04@cai.com>
  • dbase 217/udp # dBASE Unix
  • dbase 217/tcp # dBASE Unix
  • # Ashok Marwaha <—none—>
  • imap3 220/udp # Interactive Mail Access Protocol v3
  • imap3 220/tcp # Interactive Mail Access Protocol v3
  • # Glenn Davis <support@unidata.ucar.edu>
  • ldap 389/udp # Lightweight Directory Access Protocol
  • ldap 389/tcp # Lightweight Directory Access Protocol
  • # Bill Davidson <billd@equalizer.cray.com>
  • https 443/udp # http protocol over TLS/SSL
  • https 443/tcp # http protocol over TLS/SSL
  • # [RFC1568]
  • microsoft-ds 445/udp # Microsoft-DS
  • microsoft-ds 445/tcp # Microsoft-DS
  • # Mark H. Needleman <markn@sirsi.com>
  • isakmp 500/udp # isakmp
  • isakmp 500/tcp # isakmp
  • who 513/udp # maintains data bases showing who's
  • nntps 563/udp # nntp protocol over TLS/SSL (was snntp)
  • nntps 563/tcp # nntp protocol over TLS/SSL (was snntp)
  • # Kipp E.B. Hickman <kipp@netscape.com>
  • whoami 565/udp # whoami
  • whoami 565/tcp # whoami
  • # Janna Chang <janna@pmc.philips.com>
  • keyserver 584/udp # Key Server
  • keyserver 584/tcp # Key Server
  • # Gary Howland <gary@systemics.com>
  • imap4-ssl 585/udp # IMAP4+SSL (use 993 instead)
  • imap4-ssl 585/tcp # IMAP4+SSL (use 993 instead)
  • # Terry Gray <gray@cac.washington.edu>
  • # Use of 585 is not recommended, use 993 instead
  • password-chg 586/udp # Password Change
  • password-chg 586/tcp # Password Change
  • submission 587/udp # Submission
  • submission 587/tcp # Submission
  • # Michael Ginn <ginn@tyxar.com>
  • ldaps 636/udp # ldap protocol over TLS/SSL (was sldap)
  • ldaps 636/tcp # ldap protocol over TLS/SSL (was sldap)
  • # Egon Meier-Engelen <egon.meier-engelen@dlr.de>
  • ldp 646/udp # LDP
  • ldp 646/tcp # LDP
  • # Jerry Knight <jknight@realminfo.com>
  • nmap 689/udp # NMAP
  • nmap 689/tcp # NMAP
  • # Carlisle Adams <Cadams@entrust.com>
  • netconf-ssh 830/tcp # NETCONF over SSH
  • netconf-ssh 830/udp # NETCONF over SSH
  • # [RFC4742]
  • netconf-beep 831/tcp # NETCONF over BEEP
  • netconf-beep 831/udp # NETCONF over BEEP
  • # [RFC4744]
  • netconfsoaphttp 832/tcp # NETCONF for SOAP over HTTPS
  • netconfsoaphttp 832/udp # NETCONF for SOAP over HTTPS
  • # [RFC4743]
  • netconfsoapbeep 833/tcp # NETCONF for SOAP over BEEP
  • netconfsoapbeep 833/udp # NETCONF for SOAP over BEEP
  • # 849-859 Unassigned
  • iscsi 860/udp # iSCSI
  • iscsi 860/tcp # iSCSI
  • # RFC-draft-ietf-ips-iscsi-20.txt
  • owamp-control 861/tcp # OWAMP-Control
  • owamp-control 861/udp # OWAMP-Control
  • # [RFC4656]
  • # 862-872 Unassigned
  • rsync 873/udp # rsync
  • rsync 873/tcp # rsync
  • ftps-data 989/udp # ftp protocol, data, over TLS/SSL
  • ftps-data 989/tcp # ftp protocol, data, over TLS/SSL
  • ftps 990/udp # ftp protocol, control, over TLS/SSL
  • ftps 990/tcp # ftp protocol, control, over TLS/SSL
  • telnets 992/udp # telnet protocol over TLS/SSL
  • telnets 992/tcp # telnet protocol over TLS/SSL
  • imaps 993/udp # imap4 protocol over TLS/SSL
  • imaps 993/tcp # imap4 protocol over TLS/SSL
  • # Christopher Allen <ChristopherA@consensus.com>
  • pop3s 995/udp # pop3 protocol over TLS/SSL (was spop3)
  • pop3s 995/tcp # pop3 protocol over TLS/SSL (was spop3)

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