Tip: press Ctrl+F to quickly find Http port numbers (click a heading to collapse or expand)
| Port number/layer | Name | Comment |
|---|---|---|
| 1 | tcpmux | TCP Port Service Multiplexer |
| 5 | rje | Remote Job Entry |
| 7 | echo | Echo service |
| 9 | discard | Null service used for connection testing |
| 11 | systat | List the system status of connected ports |
| 13 | daytime | Sends the date and time to the requesting host |
| 17 | qotd | Send the daily quotation to connected hosts |
| 18 | msp | Message submission protocol |
| 19 | chargen | Character generator service; sends an endless stream of characters |
| 20 | ftp-data | FTP data port |
| 21 | ftp | File Transfer Protocol (FTP) port; sometimes used by the File Service Protocol (FSP) |
| 22 | ssh | Secure Shell (SSH) service |
| 23 | telnet | Telnet service |
| 25 | smtp | Simple Mail Transfer Protocol (SMTP) |
| 37 | time | Time protocol |
| 39 | rlp | Resource Location Protocol |
| 42 | nameserver | Internet Name Service |
| 43 | nicname | WHOIS directory service |
| 49 | tacacs | Terminal Access Controller Access Control System for TCP/IP-based authentication and access |
| 50 | re-mail-ck | Remote mail check protocol |
| 53 | domain | Domain name service (e.g. BIND) |
| 63 | whois++ | WHOIS++, extended WHOIS service |
| 67 | bootps | Boot Protocol (BOOTP) service; also used by the Dynamic Host Configuration Protocol (DHCP) service |
| 68 | bootpc | Bootstrap (BOOTP) client; also used by Dynamic Host Configuration Protocol (DHCP) clients |
| 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 the World Wide Web (WWW) service |
| 88 | kerberos | Kerberos network authentication system |
| 95 | supdup | Telnet protocol extension |
| 101 | hostname | Host name service on the SRI-NIC machine |
| 102 | iso-tsap | ISO Development Environment (ISODE) network application |
| 105 | csnet-ns | Mailbox name server; also used by the 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 | Verification and identification protocol |
| 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 | NET BIOS session service used by Samba in Red Hat Enterprise Linux |
| 143 | imap | Internet Message Access Protocol (IMAP) |
| 161 | snmp | Simple Network Management Protocol (SNMP) |
| 162 | snmptrap | SNMP trap |
| 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 multiplexer |
| 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 | rsvp_tunnel | RSVP tunnel |
| 369 | rpc2portmap | Coda file system port mapper |
| 370 | codaauth2 | Coda file system validation 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) proxy |
| 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 Asynchronous File Transfer (SAFT) protocol |
| 488 | gss-http | Generic Security Service (GSS) for HTTP |
| 496 | pim-rp-disc | Rendezvous Point Discovery (RP-DISC) for Protocol Independent Multicast (PIM) service |
| 500 | isakmp | Internet Security Association and Key Management Protocol (ISAKMP) |
| 535 | iiop | Internet Inter-ORB Object Request Broker Protocol (IIOP) |
| 538 | gdomap | GNUstep distributed objects mapper (GDOMAP) |
| 546 | dhcpv6-client | Dynamic Host Configuration Protocol (DHCP) version 6 client |
| 547 | dhcpv6-server | Dynamic Host Configuration Protocol (DHCP) version 6 service |
| 554 | rtsp | Real Time Streaming Protocol (RTSP) |
| 563 | nntps | Network News Transfer Protocol over Secure Sockets Layer (NNTPS) |
| 565 | whoami | whoami |
| 587 | submission | Mail Submission Agent (MSA) |
| 610 | npmp-local | Network Peripheral Management Protocol (NPMP) local/distributed queue 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 high-availability clusters |
| 749 | kerberos-adm | "kadmin" database administration for Kerberos version 5 (v5) |
| 750 | kerberos-iv | Kerberos version 4 (v4) service |
| 765 | webster | Web dictionary |
| 767 | phonebook | Network phonebook |
| 873 | rsync | rsync file transfer service |
| 992 | telnets | 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 | Comment |
|---|---|---|
| 512/tcp | exec | Used to verify remotely executed processes |
| 512/udp | biff[comsat] | Asynchronous mail client (biff) and service (comsat) |
| 513/tcp | login | Remote login (rlogin) |
| 513/udp | who[whod] | List of logged-in users |
| 514/tcp | shell[cmd] | Remote shell (rshell) and remote copy (rcp) without logging in |
| 514/udp | syslog | UNIX system log service |
| 515 | printer[spooler] | Printer (lpr) spooler |
| 517/udp | talk | Remote interactive services and clients |
| 518/udp | ntalk | Network talk (ntalk), remote conference service and client |
| 519 | utime[unixtime] | UNIX time protocol (utime) |
| 520/tcp | efs | Extended File Name 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 |
| 540/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 Filing Protocol (AFP) over Transmission Control Protocol (TCP) |
| 556 | remotefs[rfs_server,rfs] | Brunhoff's Remote File System (RFS) |
| Port number/layer | Name | Comment |
|---|---|---|
| 1080 | socks | SOCKS network proxy service for applications |
| 1236 | bvcontrol[rmtcfg] | Garcilis Packeten remote configuration server |
| 1300 | h323hostcallsc | H.323 conferencing endpoint 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 Service |
| 1524 | ingreslock | Ingres database management system (DBMS) lock service |
| 1525 | prospero-np | Unprivileged Prospero |
| 1645 | datametrics[old-radius] | Datametrics / former 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 tunnel service (LT2P) / Layer 2 forwarding (L2F) |
| 1718 | h323gatedisc | H.323 telephony gatekeeper discovery |
| 1719 | h323gatestat | H.323 telephony gatekeeper status |
| 1720 | h323hostcall | H.323 telephony conferencing settings |
| 1758 | tftp-mcast | Small file FTP multicast |
| 1759 | mtftp | Multicast small file FTP (MTFTP) |
| 1789 | hello | Hello router communication port |
| 1812 | radius | Radius dialup authentication and accounting service |
| 1813 | radius-acct | Radius accounting |
| 1911 | mtp | Starlight Networks Multimedia Transfer 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 transmission and dispatch 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 the Coda file system (callback/wbc interface) |
| 2431/tcp | venus-se | Side effects for Venus Transmission Control Protocol (TCP) |
| 2431/udp | venus-se | Side effects for Venus User Datagram Protocol (UDP) |
| 2432/udp | codasrv | Coda file system server port |
| 2433/tcp | codasrv-se | Coda file system TCP side effects |
| 2433/udp | codasrv-se | Coda filesystem 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 measurement; RIP daemon for IPv6 |
| 2604 | nsc-ccs[ospfd] | NSC CCS; Open Shortest Path First daemon (ospfd) |
| 2605 | nsc-posa | NSC POSA; border gateway protocol daemon (bgpd) |
| 2606 | netmon[ospf6d] | Dell Netmon; OSPF daemon for IPv6 (ospf6d) |
| 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 | Preboot Execution Environment (PXE) service |
| 4321 | rwhois | Remote Whois (rwhois) service |
| 4444 | krb524 | Kerberos version 5 (v5) to version 4 (v4) ticket converter |
| 5002 | rfe | Radio-Free Ethernet (RFE) audio broadcast system |
| 5308 | cfengine | Configuration engine (Cfengine) |
| 5999 | cvsup[CVSup] | CVSup file transfer and update tool |
| 6000 | x11[X] | X Window System service |
| 7000 | afs3-fileserver | Andrew File System (AFS) file server |
| 7001 | afs3-callback | AFS port used for callbacks to the cache manager |
| 7002 | afs3-prserver | AFS users and groups database |
| 7003 | afs3-vlserver | AFS file volume location database |
| 7004 | afs3-kaserver | AFS Kerberos authentication service |
| 7005 | afs3-volser | AFS file volume management server |
| 7006 | afs3-errors | AFS error explanation 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 alternate call signaling |
| 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 protocol |
| 22273 | wnn6[wnn4] | Kana/kanji conversion system |
| 26000 | quake | Quake (and related) multiplayer game server |
| 26208 | wnn6-ds | |
| 33434 | traceroute | Traceroute network tracing tool |
| Note: A comment in /etc/services reads as follows: 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 an alias. Comment in /etc/services: ports 2600 to 2606 are used by the zebra package without registration. The primary names are the registered ones; the unregistered names used by zebra are listed as aliases. Comment in the /etc/services file: this port is registered as wnn6, but an 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 info 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 multiplexer |
| 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 tool |
| 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 to 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 Web Administration Tool (SWAT) |
| 953 | rndc | Configuration tool for the Berkeley Internet Name Domain version 9 (BIND 9) remote name daemon |
| 1127 | sufiledbg | Software Upgrade Protocol (SUP) debug |
| 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 install 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 (legacy) |
| 4559/tcp | hylafax | HylaFAX client-server protocol (new service) |
| 5232 | sgi-dgl | SGI distributed graphics library |
| 5354 | noclog | NOCOL network operation center logging daemon (noclogd) |
| 5355 | 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 | An alternative to Hypertext Transfer Protocol (HTTP) |
| 8080 | webcache | World Wide Web (WWW) caching service |
| 8081 | tproxy | Transparent proxy |
| 9100/tcp | jetdirect[laserjet,hplj] | Hewlett-Packard (HP) JetDirect network printing service |
| 9359 | mandelspawn[mandelbrot] | A parallel Mandelbrot generator 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 | Integrated Services Digital Network (ISDN) login system |
| 20012 | vboxd | ISDN voice box 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 mail service |
| 60179 | fido | FidoNet email and news network |
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