Tips: Ctrl+F to quickly find the HTTP port number (click the title to shrink or expand)
| Port Number/Layer | Name | Comments |
|---|---|---|
| 1 | tcpmux | TCP port service multiplexing |
| 5 | rje | Remote work entry |
| 7 | echo | Echo Services |
| 9 | discard | Empty service for connection testing |
| 11 | systat | Used to list system status of connected ports |
| 13 | daytime | Send date and time to the requesting host |
| 17 | qotd | Send daily motto to the connected host |
| 18 | msp | Message Sending Protocol |
| 19 | chargen | Character generation service; sends an endless stream of characters |
| 20 | ftp-data | FTP data port |
| 21 | ftp | File Transfer Protocol (FTP) port; sometimes used by File Service Protocol (FSP) |
| 22 | ssh | Secure Shell (SSH) service |
| 23 | telnet | T elnet service |
| 25 | smtp | Simple Mail Transfer Protocol (SMTP) |
| 37 | time | Time Protocol |
| 39 | rlp | Resource Location Protocol |
| 42 | nameserver | Internet Name Service |
| 43 | nicname | W HOIS Directory Service |
| 49 | tacacs | Terminal Access Controller Access Control System for TCP/IP-based Authentication and Access |
| 50 | re-mail-ck | Remote Mail Checking Protocol |
| 53 | domain | Domain Name Service (such as BIND) |
| 63 | whois++ | WHOIS++, an extended WHOIS service |
| 67 | bootps | Bootstrap Protocol (BOOTP) service; also used by the Dynamic Host Configuration Protocol (DHCP) service |
| 68 | bootpc | Bootstrap (BOOTP) client; also used by the Dynamic Host Configuration Protocol (DHCP) client |
| 69 | tftp | Trivial File Transfer Protocol (TFTP) |
| 70 | gopher | Gopher Internet Document Search and Retrieval |
| 71 | netrjs-1 | Remote job service |
| 72 | netrjs-2 | Remote job service |
| 73 | netrjs-3 | Remote job service |
| 73 | netrjs-4 | Remote job service |
| 79 | finger | Finger service for user contact information | 80 | http | Hypertext Transfer Protocol (HTTP) for World Wide Web (WWW) services |
| 88 | kerberos | Kerberos network authentication system |
| 95 | supdup | Telnet protocol extensions |
| 101 | hostname | Hostname service on SRI-NIC machines |
| 102 | iso-tsap | ISO Development Environment (ISODE) Network Applications |
| 105 | csnet-ns | Mailbox name server; also used by CSO name server |
| 107 | rtelnet | Remote Telnet |
| 109 | pop2 | Post Office Protocol Version 2 |
| 110 | pop3 | Post Office Protocol Version 3 |
| 111 | sunrpc | Remote Procedure Call (RPC) protocol for remote command execution, used by Network File System (NFS) |
| 113 | auth | Authentication and Identification Protocols |
| 115 | sftp | Secure File Transfer Protocol (SFTP) Service |
| 117 | uucp-path | Unix-to-Unix Copy Protocol (UUCP) Path Service |
| 119 | nntp | Network News Transfer Protocol (NNTP) for the USENET Discussion System |
| 123 | ntp | Network Time Protocol (NTP) |
| 137 | netbios-ns | NETBIOS Name Service used by Samba in Red Hat Enterprise Linux |
| 138 | netbios-dgm | NETBIOS Datagram Service used by Samba in Red Hat Enterprise Linux |
| 139 | netbios-ssn | NETBIOS BIOS Session Service |
| 143 | imap | Internet Message Access Protocol (IMAP) |
| 161 | snmp | Simple Network Management Protocol (SNMP) |
| 162 | snmptrap | SNMP Traps |
| 163 | cmip-man | Common Management Information Protocol (CMIP) |
| 164 | cmip-agent | Common Management Information Protocol (CMIP) |
| 174 | mailq | MAILQ |
| 177 | xdmcp | X Display Manager Control Protocol |
| 178 | nextstep | NeXTStep Window Server |
| 179 | bgp | Border Network Protocol |
| 191 | prospero | Cliffod Neuman's Prospero Service |
| 194 | irc | Internet Relay Chat (IRC) |
| 199 | smux | SNMP UNIX Multiplexing |
| 201 | at-rtmp | AppleTalk Routing |
| 202 | at-nbp | AppleTalk Name Binding |
| 204 | at-echo | AppleTalk echo service |
| 206 | at-zis | AppleTalk block information |
| 209 | qmtp | Quick Mail Transfer Protocol (QMTP) |
| 210 | z39.50 | NISO Z39.50 database |
| 213 | ipx | Internetwork Packet Exchange (IPX), a datagram protocol commonly used in Novell Netware environments |
| 220 | imap3 | Internet Message Access Protocol Version 3 |
| 245 | link | LINK |
| 347 | fatserv | Fatmen Server |
| 363 | d>rsvp_tunnel | RSVP Tunnel |
| 369 | rpc2portmap | Coda File System Port Mapper |
| 370 | codaauth2 | Coda File System Authentication Service |
| 372 | ulistproc | UNIX listserv |
| 389 | ldap | Lightweight Directory Access Protocol (LDAP) |
| 427 | svrloc | Service Location Protocol (SLP) |
| 434 | mobileip-agent | Mobile Internet Protocol (IP) Agent |
| 435 | mobilip-mn | Mobile Internet Protocol (IP) Manager |
| 443 | https | Secure Hypertext Transfer Protocol (HTTP) |
| 444 | snpp | Small Network Paging Protocol |
| 445 | microsoft-ds | Server Message Block (SMB) over TCP/IP |
| 464 | kpasswd | Kerberos Password and Key Change Service |
| 468 | photuris | Photuris Session Key Management Protocol |
| 487 | saft | Simple Asymmetric File Transfer (SAFT) Protocol |
| 488 | gss-http | Generic Security Services (GSS) for HTTP |
| 496 | pim-rp-disc | Rendezvous Point Discovery (RP-DISC) for Protocol Independent Multicast (PIM) Service |
| 50 0 | isakmp | Internet Security Association and Key Management Protocol (ISAKMP) |
| 535 | iiop | Internet Intra-Object Request Broker Protocol (IIOP) |
| 538 | gdomap | GNUstep Distributed Object Mapper (GDOMAP) |
| 546 | dhcpv6-client | Dynamic Host Configuration Protocol (DHCP) version 6 Client |
| 547 | dhcpv6-server | Dynamic Host Configuration Protocol (DHCP) version 6 Server |
| 554 | rtsp | Real Time Streaming Protocol (RTSP) |
| 563 | nntps | Network News Transfer Protocol over Secure Sockets Layer (NNTPS) |
| 565 | whoami | whoami |
| 587 | submission | Mail Message Submission Agent (MSA) |
| 610 | npmp-local | Network Peripheral Management Protocol (NPMP) Local/Distributed Queuing System (DQS) |
| 611 | npmp-gui | Network Peripheral Management Protocol (NPMP) GUI/Distributed Queuing System (DQS) |
| 612 | hmmp-ind | HMMP indication/DQS |
| 631 | ipp | Internet Printing Protocol (IPP) |
| 636 | ldaps | Lightweight Directory Access Protocol over Secure Sockets Layer (LDAPS) |
| 674 | acap | Application Configuration Access Protocol (ACAP) |
| 694 | ha-cluster | Heartbeat service for clusters with high availability |
| 749 | kerberos-adm | "kadmin" database administration for Kerberos version 5 (v5)理 |
| 750 | kerberos-iv | Kerberos version 4 (v4) service |
| 765 | webster | Network dictionary |
| 767 | phonebook | Network phonebook |
| 873 | rsync | rsync file transfer service |
| 992 | telnets | telnets d>Telnet over Secure Sockets Layer (TelnetS) |
| 993 | imaps | Internet Message Access Protocol over Secure Sockets Layer (IMAPS) |
| 994 | ircs | Internet Relay Chat over Secure Sockets Layer (IRCS) |
| 995 | pop3s | Post Office Protocol version 3 over Secure Sockets Layer（POPS3） |
| Port Number/Layer | Name | Comments |
|---|---|---|
| 512/tcp | exec | Used to authenticate remotely executed processes |
| 512/udp | biff[comsat] | Asynchronous mail client (biff) and service (comsat) |
| 513/tcp | login | Remote login (rlogin) |
| 513/udp | who[whod] | Logged-in user list |
| 514/tcp | shell[cmd] | Remote shell (rshell) and remote copy (rcp) without logging in |
| 514/udp | syslog | UNIX system logging service |
| 515 | printer[spooler] | Printer (lpr) spooling |
| 517/udp | talk | Remote dialogue service and client |
| 518/udp | ntalk | Network talk (ntalk), remote dialogue service and client |
| 519 | utime[unixtime] | UNIX Time Protocol (ut ime) |
| 520/tcp | efs | Extended Filename Server (EFS) |
| 520/udp | router[route,routed] | Routing Information Protocol (RIP) |
| 521 | ripng | Routing Information Protocol for Internet Protocol version 6 (IPv6) |
| 525 | timed[timeserver] | Time daemon (timed) |
| 526/tcp | tempo[newdate] | Tempo |
| 530/tcp | courier[rpc] | Courier Remote Procedure Call (RPC) protocol |
| 531/tcp | conference[chat] | Internet Relay Chat |
| 532 | netnews | Netnews |
| 533/udp | netwall | Netwall for emergency broadcasts |
| 5 40/tcp | uucp[uucpd] | Unix-to-Unix Copy Service |
| 543/tcp | klogin | Kerberos Version 5 (v5) Remote Login |
| 544/tcp | kshell | Kerberos Version 5 (v5) Remote Shell |
| 548 | afpovertcp | Appletalk File System Protocol (AFP) over Transmission Control Protocol (TCP) |
| 556 | remotefs[rfs_server,rfs] | Brunhoff's Remote File System (RFS) |
| Port Number/Layer | Name | Comments |
|---|---|---|
| 1080 | socks | SOCKS network application proxy service |
| 1236 | bvcontrol[rmtcfg] | Garcilis Packeten Remote Configuration Server |
| 1300 | h323hostcallsc | H.323 Telephone Conferencing Host Phone Security |
| 1433 | ms-sql-s | Microsoft SQL Server |
| 1434 | ms-sql-m | Microsoft SQL Monitor |
| 1494 | ica | Citrix ICA Client |
| 1512 | wins | Microsoft Windows Internet Name Server |
| 1524 | ingreslock | Ingres database management system (DBMS) locking service |
| 1525 | prospero-np | unprivileged Prospero |
| 1645 | datametrics[old-radius] | Datametrics/old RADIUS project 1646 sa-msg-port [oldradacct] sa-msg-port / former radacct project 1649 kermit kermit file transfer and management service 1701 l2tp [l2f] Layer 2 Tunneling Service (LT2P) / Layer 2 Forwarding (L2F) |
| 1718 | h323gatedisc | H.323 telecommunications gatekeeper discovery mechanism |
| 1719 | h323gatestat | H.323 telecommunications gatekeeper status |
| 1720 | h323hostcall | H.323 telecommunications host call settings |
| 1758 | tftp-mcast | Small file FTP multicast |
| 1760 | tftp-mcast | Small file FTP multicast |
| 1770 | tftp-mcast | Small file FTP multicast |
| 1771 | tftp-mcast | Small file FTP multicast |
| 1771 td>1759 | mtftp | Multicast Small File FTP (MTFTP) |
| 1789 | hello | Hello router communication port |
| 1812 | radius | Radius dial-up authentication and accounting service |
| 1813 | radius-acct | Radius s Accounting |
| 1911 | mtp | Starlight Network Multimedia Transport Protocol (MTP) |
| 1985 | hsrp | Cisco Hot Standby Router Protocol |
| 1986 | licensedaemon | Cisco License Management Daemon |
| 1997 | gdp-port | Cisco Gateway Discovery Protocol (GDP) |
| 2049 | nfs[nfsd] | Network File System (NFS) |
| 2102 | zephyr-srv | Zephyr Notification Transport and Delivery Server |
| 2103 | zephyr-clt | Zephyr serv-hm connection |
| 2104 | zephyr-hm | Zephyr Host Manager |
| 2401 | cvspserver | Concurrent Versions System (CVS) client/server operations |
| 2430/tcp | venus | Venus cache manager for the Coda file system (codacon port) |
| 2430/udp | venus | Venus cache manager for Coda file system (callback/wbc interface) 2431/tcp venus-se Venus Transmission Control Protocol (TCP) side effects 2431/udp venus-se Venus User Datagram Protocol (UDP) side effects 2432/udp codasrv Coda file system server port 2433/tcp codasrv-se Coda file system TCP side effects 2433/udp codasrv-se Coda file system UDP SFTP side effects |
| 2600 | hpstgmgr[zebrasrv] | HPSTGMGR; Zebra routing |
| 2601 | discp-client[zebra] | discp client; Zebra integrated shell |
| 2602 | discp-server[ripd] | discp server; Routing Information Protocol Daemon (ripd) |
| 2603 | servicemeter[ripngd] | Service Metering; RIP daemon for IPv6 |
| 2604 | nsc-ccs[ospfd] | NSC CCS; Open Short Path First Daemon（ospfd） |
| 2605 | nsc-posa | NSC POSA; Border Network Protocol Daemon (bgpd) 2606 netmon[ospf6d] Dell Netmon; OSPF daemon (ospf6d) for IPv6 2809 corbaloc Common Object Request Broker Architecture (CORBA) Naming Service Locator 3130 icpv2 Internet Cache Protocol version 2 (v2); used by the Squid proxy cache server 3306 mysql MySQL database service 3346 trnsprntproxy Trnsprnt proxy |
| 4011 | pxe | Pre-execution environment (PXE) services |
| 4321 | rwhois | Remote Whois (rwhois) service |
| 4444 | krb524 | Kerberos Version 5 (v5) to Version 4 (v4) ticket translator |
| 5002 | rfe | Radio Frequency Ethernet (RFE) audio broadcast system |
| 5308 | cfengine | Configuration Engine (Cfengine) |
| 5999 | td>cvsup[CVSup] | CVSup file transfer and update tool |
| 6000 | x11[X] | X Window System Services |
| 7000 | afs3-fileserver | Andrew File System (AFS) file server |
| 7001 | afs3-callback | AFS port for calling back the cache manager |
| 7002 | afs3-prserver | AFS user and group database |
| 7003 | afs3-vlserver | AFS file volume location database Kerberos Authentication Service |
| 7005 | afs3-volser | AFS Volume Management Server |
| 7006 | afs3-errors | AFS Error Interpretation Service |
| 7007 | afs3-bos | AFS Basic Monitoring Process |
| 7008 | afs3-update | AFS Server to Server Updater |
| 7009 | afs3-rmtsys | AFS Remote Cache Manager Service |
| 9876 | sd | Session Director |
| 10080 | amanda | Advanced Maryland Automatic Network Disk Archiver (Amanda) backup service |
| 11371 | pgpkeyserver | Pretty Good Privacy (PGP)/GNU Privacy Guard (GPG) public key server |
| 11720 | h323callsigalt | H.323 Call Signal Alternation |
| 13720 | bprd | Veritas NetBackup Request Daemon (bprd) |
| 13721 | bpdbm | Veritas NetBackup Database Manager (bpdbm) |
| 13722 | bpjava-msvc | Veritas NetBackup Java/Microsoft Visual C++ (MSVC) Protocol |
| 13724 | vnetd | Veritas Network Tools |
| 13782 | bpcd | Vertias NetBackup |
| 13783 | vopied | Veritas VOPIED协议 |
| 22273 | wnn6[wnn4] | Kana/Kanji Conversion System |
| 26000 | quake | Quake (and related) multiplayer game servers |
| 26208 | wnn6-ds | |
| 33434 | traceroute | Traceroute network tracing tool |
| Note: A comment in /etc/services reads: Port 1236 is registered as "bvcontrol", but it is also used by the Gracilis Packeten remote configuration server. The official name is listed as the primary name, and the unregistered name is listed as the alias. Comment in /etc/services: Ports 2600 to 2606 are used unregistered by the zebra package. The primary names are the registered names, and the unregistered names used by zebra are listed as aliases. Comment in the /etc/services file: This port is registered as wnn6, but the unregistered "wnn4" is also used in the FreeWnn package. | ||
| Port Number/Layer | Name | Comment |
|---|---|---|
| 1/ddp | rtmp | Routing Table Management Protocol |
| 2/ddp | nbp | Name Binding Protocol |
| 4/ddp | echo | AppleTalk Echo Protocol |
| 6/ddp | zip | Block Message Protocol |
| Port Number/Layer | Name | Comment |
|---|---|---|
| 751 | kerberos_master | Kerberos authentication |
| 752 | passwd_server | Kerberos password (kpasswd) server |
| 754 | krb5_prop | Kerberos v5 slave propagation |
| 760 | krbupdate[kreg] | Kerberos registration |
| 1109 | kpop | Kerberos Post Office Protocol (KPOP) |
| 2053 | knetd | Kerberos demultiplexer |
| 2105 | eklogin | Kerberos v5 encrypted remote login（rlogin） |
| Port number/layer | Name | Comment |
|---|---|---|
| 15/tcp | netstat | Network status (netstat) |
| 98/tcp | linuxconf | Linuxconf Linux Administration Tools |
| 106 | poppassd | Post Office Protocol Password Change Daemon (POPPASSD) |
| 465/tcp | smtps | Simple Mail Transfer Protocol over Secure Sockets Layer (SMTPS) |
| 616/tcp | gii | Interactive interface using the gateway (routing daemon) |
| 808 | omirr[omirrd] | Online Mirror (Omirr) file mirroring service |
| 871/tcp | supfileserv | Software Upgrade Protocol (SUP) server |
| 901/tcp | swat | Samba World Wide Web Administration Tool (SWAT) |
| 953 | rndc | Berkeley Internet Name Domain Version 9 (BIND 9) Remote Name Daemon Configuration Tool |
| 1127 | sufiledbg | Software Upgrade Protocol (SUP) Debugging |
| 1178/tcp | skkserv | Simple Kana to Kanji (SKK) Japanese Input Server |
| 1313/tcp | xtel | French Minitel Text Information System |
| 1529/tcp | support[prmsd,gnatsd] | GNATS Bug Tracking System |
| 2003/tcp | cfinger | GNU Finger service |
| 2150 | ninstall | Network installation service |
| 2988 | afbackup | afbackup client-server backup system |
| 3128/tcp | squid | Squid World Wide Web proxy cache |
| 3455 | prsvp | RSVP port |
| 5432 | postgres | PostgreSQL database |
| 4557/tcp | fax | FAX transmission service (old service) |
| 4559/tcp | hylafax | HylaFAX client-server protocol (new service) |
| 5232 | sgi-dgl | SGI distributed graphics library |
| 5354 | noclog | NOCOL Network Operations Center Logging Daemon (noclogd) |
| 5355 | td>hostmon | NOCOL Network Operations Center Host Monitoring |
| 5680/tcp | canna | Canna Japanese Character Input Interface |
| 6010/tcp | x11-ssh-offset | Secure Shell (SSH) X11 forwarding offset |
| 6667 | ircd | Internet Relay Chat Daemon (ircd) |
| 7100/tcp | xfs | X Font Server (XFS) |
| 7666/tcp | tircproxy | Tircproxy IRC proxy service |
| 8008 | http-alt | Another choice for Hypertext Transfer Protocol (HTTP) |
| 8080 | webcache | World Wide Web (WWW) cache service |
| 8081 | tproxy | Transparent proxy |
| 9100/tcp | jetdirect[laserjet,hplj] | Hewlett-Packard (HP) JetDirect Network Print Service |
| 9359 | mandelspawn[mandelbrot] | Parallel Mandelbrot Spawner for the X Window System |
| 10081 | kamanda | Amanda Backup Service Using Kerberos |
| 10082/tcp | amandaidx | Amanda Backup Service |
| 10083/tcp | amidxtape | Amanda Backup Service |
| 20011 | isdnlog | ISDN Login System |
| 20012 | vboxd | ISDN Speaker Daemon (vboxd) |
| 22305/tcp | wnn4_Kr | kWnn Korean Input System |
| 22289/tcp | wnn4_Cn | cWnn Chinese Input System |
| 22321/tcp | wnn4_Tw | tWnn Chinese Input System (Taiwan) |
| 24554 | binkp | Binkley TCP/IP Fidonet mailer daemon |
| 27374 | asp | Address search protocol |
| 60177 | tfido | Ifmail FidoNet compatible mailing service |
| 60179 | fido | FidoNet email and news network |
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