Famous Port Correspondence table

Famous port

Port number/layer name Comment

1tcpmuxTCP Port Service multiplexing

5rje remote Operation portal

7echoecho Service

9Discard NULL service for connection testing

systat to enumerate the system states of the connected ports

Daytime send date and time to request host

QOTD send the daily motto to the connected host

MSP message Sending protocol

Chargen character generation service; send endless stream of characters

ftp-dataFTP data port

ftp File Transfer Protocol (FTP) port, sometimes used by the File Service Protocol (FSP)

ssh secure Shell (SSH) service

telnettelnet Service

SMTP Simple Mail Transfer Protocol (SMTP)

PNS Time Protocol

RLP Resource Location Protocol

nameserver Internet Name Service

nicnameWHOIS directory Service

tacacs for terminal Access Controller access control system based on TCP/IP authentication and access

re-mail-ck Remote Mail Check protocol

domains Domain Services (such as BIND)

Thewhois++whois++, the extended WHOIS service

Bootps Boot Protocol (BOOTP) service, also used by the Dynamic Host Configuration Protocol (DHCP) service

bootpcBootstrap (BOOTP) client, also used by Dynamic Host Configuration Protocol (DHCP) clients

Thetftp Small File Transfer Protocol (TFTP)

GopherGopher Internet document search and retrieval

netrjs-1 Remote Job Service

netrjs-2 remote Operation service

netrjs-3 remote Operation service

netrjs-4 remote Operation service

finger finger Service for user contact information

http Hypertext Transfer Protocol (HTTP) for the World Wide Web (WWW) service

the networkauthentication system of the IP Kerberos Kerberos

supdupTelnet Protocol extension

101hostnamesri-nic Machine host Name Service

102ISO-TSAPISO development environment (ISODE) Network application

csnet-ns mailbox name server, also used by CSO name servers

107rtelnet remote Telnet

109pop2 Post Office Protocol version 2

POP3 Post Office Protocol version 3

111SUNRPC Remote Procedure Call (RPC) protocol for Remote command execution, used by the network File System (NFS)

113Auth authentication and identification protocol

Thesftp Secure File Transfer Protocol (SFTP) service

117Uucp-pathUnix-to-UNIX replication protocol (UUCP) path service

119NNTP Network News Transfer Protocol (NNTP) for USENET discussion systems

123NTP Network Time Protocol (NTP)

137netbios-ns NetBIOS Name service used by Samba in Red Hat Enterprise Linux

138NETBIOS-DGM NetBIOS Datagram service used by Samba in Red Hat Enterprise Linux

139netbios-ssn the net BIOS session service used by Samba in Red Hat Enterprise Linux

143IMAP Internet Message Access Protocol (IMAP)

161SNMP Simple Network Management Protocol (SNMP)

162snmptrapSNMP Traps

163Cmip-man General Management Information Protocol (CMIP)

164cmip-agent General Management Information Protocol (CMIP)

174MAILQMAILQ

177XDMCPX Display Manager Control protocol

178nextstepnextstep Window Server

179BGP Boundary Network protocol

191Prosperocliffod Neuman Prospero Services

194IRC Internet Relay Chat (IRC)

199smuxSNMP UNIX multiplexing

201at-rtmpAppleTalk Road Selection

202at-nbpAppleTalk Name binding

204At-echoAppleTalk Echo Service

206At-zisAppleTalk block info

209qmtp Fast Mail Transfer Protocol (QMTP)

z39.50niso Z39.50 Database

213IPX Internetwork Packet Switching Protocol (IPX), a datagram protocol commonly used by Novell Netware environments

imap3 Internet Message Access Protocol version 3

245linklink

347fatservfatmen Server

363rsvp_tunnelRSVP Tunnel

369rpc2portmapCoda file System port mapper

370codaauth2Coda file System validation Service

372ulistprocUNIX Listserv

389LDAP Lightweight Directory Access Protocol (LDAP)

427svrloc Service Location Protocol (SLP)

434mobileip-agent Removable Internet Protocol (IP) proxy

435mobilip-mn Removable Internet Protocol (IP) manager

443HTTPS Secure Hypertext Transfer Protocol (HTTP)

444SNPP Small Network Paging protocol

445microsoft-ds Server Message Block (SMB) over TCP/IP

464kpasswdKerberos Password and key change service

468Photurisphoturis session Key Management Protocol

487Saft Simple Asymmetric file Transfer (Saft) protocol

488gss-http Universal Security Service (GSS) for HTTP

496Pim-rp-disc Rendezvous Point Discovery for Protocol-Independent Multicast (PIM) services (RP-DISC)

ISAKMP Internet Security Association and Key Management Protocol (ISAKMP)

535IIOP Internet Internal Object Request Proxy Protocol (IIOP)

538gdomapGNUstep Distributed Object Mapper (GDOMAP)

546dhcpv6-client Dynamic Host Configuration Protocol (DHCP) version 6 customer

547dhcpv6-server Dynamic Host Configuration Protocol (DHCP) version 6 Service

554rtsp Real-time Streaming Protocol (RTSP)

563Nntps Network News Transfer Protocol via Secure Sockets Layer (NNTPS)

565whoamiwhoami

587Submission mail message submission agent (MSA)

610npmp-local Network Peripheral Management Protocol (NPMP) local/Distributed Queueing System (DQS)

611Npmp-gui Network Peripheral Management Protocol (NPMP) GUI/Distributed Queueing System (DQS)

612Hmmp-indHMMP Instructions/DQS

631IPP Internet Printing Protocol (IPP)

636ldaps Lightweight Directory Access Protocol via Secure Sockets Layer (LDAPS)

674acap application Configuration Access Protocol (ACAP)

694ha-cluster for heartbeat services for clusters with high availability

749"kadmin" database management for KERBEROS-ADM Kerberos version 5 (V5)

kerberos-ivKerberos version 4 (v4) Service

765Webster Network Dictionary

767Phonebook Network phone Book

873rsyncrsync File Transfer Service

992telnets via Secure Sockets Layer Telnet (Telnets)

993imaps Internet Message Access Protocol via Secure Sockets Layer (IMAPS)

994ircs Internet Relay Chat via Secure Sockets Layer (IRCS)

995pop3s via Secure Sockets Layer Post Office Protocol version 3 (POPS3)

Famous Port Correspondence table