Tip: Ctrl+F to quickly find the Http port number (click the title to shrink or expand)
| Port Number/Level | Name | Comments |
|---|---|---|
| 1 | tcpmux | TCP port service multiplexing |
| 5 | rje | Remote Job Portal |
| 7 | echo | Echo Service |
| 9 | discard | Empty service for connection testing |
| 11 | systat | System status for enumerating connected ports |
| 13 | daytime | Send date and time to requesting host |
| 17 | qotd | Sends a daily motto to connected hosts |
| 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 | Telnet service |
| 25 | smtp | Simple Mail Transfer Protocol (SMTP) |
| 37 | time | Time Protocol |
| 39 | rlp | Resource Locator 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 checking protocols |
| 53 | domain | Domain name services (e.g. BIND) |
| 63 | whois++ | WHOIS++, extended WHOIS services |
| 67 | bootps | Bootstrap Protocol (BOOTP) services; also used by Dynamic Host Configuration Protocol (DHCP) services |
| 68 | bootpc | Bootstrap (BOOTP) clients; also used by Dynamic Host Configuration Protocol (DHCP) clients |
| 69 | tftp | Small 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 Work 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) web application |
| 105 | csnet-ns | Mailbox name servers; also used by CSO name servers |
| 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) services |
| 117 | uucp-path | Unix to Unix Copy Protocol (UUCP) path service |
| 119 | nntp | Network News Transfer Protocol (NNTP) used by 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 | Pitfalls of SNMP |
| 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 messaging |
| 209 | qmtp | Quick Mail Transfer Protocol (QMTP) |
| 210 | z39.50 | NISO Z39.50 database |
| 213 | ipx | Internet Packet Exchange Protocol (IPX), commonly used datagram protocol by 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 Authentication Service |
| 372 | ulistproc | UNIX Listserv |
| 389 | ldap | Lightweight Directory Access Protocol (LDAP) |
| 427 | svrloc | Service Location Protocol (SLP) |
| 434 | mobileip-agent | Removable Internet Protocol (IP) Proxy |
| 435 | mobilip-mn | Removable 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 changing service |
| 468 | photuris | Photuris session key management protocol |
| 487 | saft | Simple Asymmetric File Transfer (SAFT) protocol |
| 488 | gss-http | Generic Security Service (GSS) for HTTP |
| 496 | pim-rp-disc | Rendezvous Point Discovery for Protocol-Independent Multi-Access Propagation (PIM) Service (RP-DISC) |
| 500 | isakmp | Internet Security Association and Key Management Protocol (ISAKMP) |
| 535 | iiop | Internet Internal Object Request Proxy 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 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 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 Instruction/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 | Kerberos version 5 (v5) "kadmin" database management |
| 750 | kerberos-iv | Kerberos version 4 (v4) services |
| 765 | webster | Web Dictionary |
| 767 | phonebook | Web 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 (POPS3) over Secure Sockets Layer |
| Port Number/Layer | Name | Comments |
|---|---|---|
| 512/tcp | exec | Used for authentication of 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) that do not require login |
| 514/udp | syslog | UNIX syslog service |
| 515 | printer[spooler] | Printer (lpr) pseudo-offline |
| 517/udp | talk | Remote dialogue services and clients |
| 518/udp | ntalk | Network talk (ntalk), remote dialogue services and clients |
| 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 replication service |
| 543/tcp | klogin | Kerberos version 5 (v5) remote login |
| 544/tcp | kshell | Kerberos version 5 (v5) remote shell |
| 548 | afpovertcp | Appletalk File Preparation 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 Web Application Agent Service |
| 1236 | bvcontrol[rmtcfg] | Garcilis Packeten Remote Configuration Server |
| 1300 | h323hostcallsc | H.323 teleconferencing 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) Lockdown 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 Tunneling Services (LT2P)/Layer 2 Forwarding (L2F) |
| 1718 | h323gatedisc | H.323 telecommunication gatekeeper discovery mechanism |
| 1719 | h323gatestat | H.323 Telecommunication Gatekeeper Status |
| 1720 | h323hostcall | H.323 telecommunication host phone settings |
| 1758 | tftp-mcast | Multicast Small File FTP |
| 1759 | mtftp | Multicast Small File FTP (MTFTP) |
| 1789 | hello | Hello router communication port |
| 1812 | radius | Radius dial-up authentication and accounting services |
| 1813 | radius-acct | Radius billing |
| 1911 | mtp | Starlight Network Multimedia Transport Protocol (MTP) |
| 1985 | hsrp | Cisco Hot Standby Router Protocol |
| 1986 | licensedaemon | Cisco Licence Management Daemon |
| 1997 | gdp-port | Cisco Gateway Discovery Protocol (GDP) |
| 2049 | nfs[nfsd] | Network File System (NFS) |
| 2102 | zephyr-srv | Zephyr Notification Transmission and Delivery Server |
| 2103 | zephyr-clt | Zephyr serv-hm connection |
| 2104 | zephyr-hm | Zephyr host manager |
| 2401 | cvspserver | Parallel versioning system (CVS) client/server operation |
| 2430/tcp | venus | Venus Cache Manager for 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 | Side Effects of 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 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 for IPv6 (ospf6d) |
| 2809 | corbaloc | Common Object Request Brokerage Architecture (CORBA) Naming Service Locator |
| 3130 | icpv2 | Internet Cache Protocol version 2 (v2); used by Squid Proxy Cache Server |
| 3306 | mysql | MySQL database service |
| 3346 | trnsprntproxy | Trnsprnt proxy |
| 4011 | pxe | Pre-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 Frequency 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 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 |
| 7004 | afs3-kaserver | AFS Kerberos authentication service |
| 7005 | afs3-volser | AFS file volume management server |
| 7006 | afs3-errors | AFS error interpretation service |
| 7007 | afs3-bos | AFS Basic Supervisor Process |
| 7008 | afs3-update | AFS Server-to-Server Updater |
| 7009 | afs3-rmtsys | AFS Remote Cache Manager Service |
| 9876 | sd | Session Guider |
| 10080 | amanda | Advanced Maryland Automated Network Disk Archiver (Amanda) backup service |
| 11371 | pgpkeyserver | Good Privacy (PGP)/GNU Privacy Guard (GPG) public key server |
| 11720 | h323callsigalt | H.323 call signalling 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) protocols |
| 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 servers |
| 26208 | wnn6-ds | |
| 33434 | traceroute | Traceroute network tracking tool |
| Notes. The comments in /etc/services are 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. Note in /etc/services: Ports 2600 to 2606 are used unregistered by the zebra package. Primary names are registered names, unregistered names used by zebra are listed as aliases. Note in the /etc/services file: The port is registered as wnn6, but also uses the unregistered "wnn4" in the FreeWnn package. | ||
| Port Number/Layer | Name | Comments (shows a list of ports related to the Datagram Delivery Protocol (DDP). |
|---|---|---|
| 1/ddp | rtmp | Routing Table Management Protocol |
| 2/ddp | nbp | Name Binding Protocol |
| 4/ddp | echo | AppleTalk Echo Protocol |
| 6/ddp | zip | Block Information Protocol |
| Port Number/Layer | Name | Comments |
|---|---|---|
| 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/Level | Name | Comments |
|---|---|---|
| 15/tcp | netstat | Network status (netstat) |
| 98/tcp | linuxconf | Linuxconf Linux management 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 using the gateway's (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 | Minitel Text Information System (France) |
| 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 Ports |
| 5432 | postgres | PostgreSQL database |
| 4557/tcp | fax | FAX Transport Service (old service) |
| 4559/tcp | hylafax | HylaFAX Client-Server Protocol (new service) |
| 5232 | sgi-dgl | SGI distributed graphics library |
| 5354 | noclog | NOCOL Network Operations Centre logging daemon (noclogd) |
| 5355 | hostmon | NOCOL Network Operations Centre 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 | Hypertext Transfer Protocol (HTTP) alternative |
| 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] | Parallel Mandelbrot Generator for the X Window System |
| 10081 | kamanda | Amanda Backup Service with 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 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 mailing programme daemon |
| 27374 | asp | Address Search Protocol |
| 60177 | tfido | Ifmail FidoNet Compatible Mailing Service |
| 60179 | fido | FidoNet Email and News Network |