HTTP, TCP, UDP common port comparison table, the following lists the most common communication ports used by services, daemons, and programs included in the Linux
Tip: Ctrl + F to quickly find the Http port number (click the header to shrink or expand)
| Port number/layer | name | comment |
|---|---|---|
| 1 | Tcpmux | TCP port service multiplexing |
| 5 | RJE | remote job portal |
| 7 | Echo | Echo service |
| 9 | Discard | Empty service for connection testing |
| 11 | Systat | Used to enumerate the system status of connected ports |
| 13 | Daytime | Send the date and time to the requesting host |
| 17 | QOTD | Send a daily motto to a connected host |
| 18 | MSP | Messaging Protocol |
| 19 | Chargen | Character generation service; sending 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 agreement |
| 39 | RLP | Resource Location Protocol |
| 42 | Nameserver | Internet Name Service |
| 43 | NICNAME | WHOIS Directory Service |
| 49 | TACACS | An end point access controller for TCP/IP based authentication and access |
| 50 | Re-mail-ck | Remote Mail Check Protocol |
| 53 | Domain | Domain name services (such as BIND) |
| 63 | WHOIS ++ | WHOIS ++, the extended WHOIS service |
| 67 | Bootps | Boot Protocol (BOOTP) service; also used by Dynamic Host Configuration Protocol (DHCP) service |
| 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 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 Verification System |
| 95 | Supdup | Telnet protocol extension |
| 101 | Hostname | Hostname service on SRI-NIC machines |
| 102 | iso-tsap | ISO development environment (ISODE) network application |
| 105 | csnet-ns | Mailbox name servers; also used by CSO name servers |
| 107 | RTELNET | 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 the Network File System (NFS) |
| 113 | Auth | Authentication and Identity Protocol |
| 115 | SFTP | Secure File Transfer Protocol (SFTP) service |
| 117 | UUCP-Path | Unix to Unix Replication 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 | The 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 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 | Fast Mail Transfer Protocol (QMTP) |
| 210 | Z39.50 | NISO Z39.50 database |
| 213 | IPX | Internet Packet Switching Protocol (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 Agreement (SLP) |
| 434 | MobileEP-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 Change Service |
| 468 | Photuris | Photuris Session Key Management Protocol |
| 487 | Saft | Simple Asymmetric File Transfer (SAFT) Protocol |
| 488 | gss-http | General Security Service (GSS) for HTTP |
| 496 | Pim-rp-disc | Rendezvous Point Discovery (RP-DISC) for Protocol Independent Multiple Access Propagation (PIM) Services |
| 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 (NNTPS) via Secure Sockets Layer |
| 565 | Whoami | Whoami |
| 587 | Submission | Mail 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 (LDAPS) via Secure Sockets Layer |
| 674 | ACAP | Application Configuration Access Protocol (ACAP) |
| 694 | ha-cluster | Heartbeat service for clusters with high availability |
| 749 | Kerberos-adm | "Kadmin" database management Kerberos version 5 (v5) |
| 750 | Kerberos-iv | Kerberos version 4 (v4) service |
| 765 | Webster | Internet Dictionary |
| 767 | phonebook | Internet Phone Book |
| 873 | rsync | rsync file transfer service |
| 992 | Telnets | Telnet (TelnetS) through Secure Sockets Layer |
| 993 | IMAPS | Internet Message Access Protocol (IMAPS) via Secure Sockets Layer |
| 994 | IRCS | Internet Relay Chat (IRCS) via Secure Sockets Layer |
| 995 | pop3s | Post Office Protocol Version 3 (POPS3) via Secure Sockets Layer |
| Port number/layer | name | comment |
|---|---|---|
| 512/tcp | Exec | Used to authenticate remotely executed processes |
| 512/udp | Biff [comsat] | Asynchronous mail clients (BIFs) and services (ComSats) |
| 513/tcp | Login | Remote login (rlogin) |
| 513/udp | Who [whod] | List of logged in users |
| 514/tcp | Shell [cmd] | Remote shell (rshell) and remote replication (rcp) without login |
| 514/udp | Syslog | UNIX System Log Service |
| 515 | Printer [spooler] | Printer (lpr) spooling |
| 517/udp | talk | Remote conversation services and customers |
| 518/udp | ntalk | Network chat (ntalk), remote conversation services, and customers |
| 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 Broadcasting |
| 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 Documentation 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 Web Application Proxy 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 customers |
| 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/previous radius projects |
| 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 Status of telecommunications gatekeepers |
| 1720 | H323hostcall | H.323 Telecom Hosting Phone Setup |
| 1758 | TFTP-MCast | Small File FTP Multicast |
| 1759 | MTFTP | Multicast Small File FTP (MTFTP) |
| 1789 | Hello | Hello router communication port |
| 1812 | radius | Radius dial-up verification and billing services |
| 1813 | radius-acct | Radius 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 servo-hm connection |
| 2104 | Zephyr-hm | Zephyr Host Manager |
| 2401 | CVSPServer | Parallel Versioning 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 daemons 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 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 Converter |
| 5002 | RFE | Radio Frequency Ethernet (RFE) Audio Broadcasting 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 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 Validation Services |
| 7005 | AFS3-volser | AFS file 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 | conversation director |
| 10080 | Amanda | Advanced Maryland Automatic Network Disk Archiver (Amanda) Backup Service |
| 11371 | pgpkeyServer | 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 Agreement |
| 22273 | Wnn6 [wnn4] | Kana/Kanji Conversion System |
| 26000 | Quake | Quake (and related) multiplayer servers |
| 26208 | Wnn6-ds | |
| 33434 | Traceroute | Traceroute Network Tracking Tool |
| Note: The comment in the /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 unregistered names are listed as aliases. Notes in/etc/services: Ports 2600 through 2606 are used unregistered by the zebra package. The primary name is the registered name, and unregistered names used by zebra are listed as aliases. /etc/services note in the file: The 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 information protocol |
| Port number/layer | name | comment |
|---|---|---|
| 751 | kerberos_master | Kerberos verification |
| 752 | passwd_server | Kerberos password (kpasswd) server |
| 754 | krb5_prop | Kerberos v5 dependent propagation |
| 760 | Krbupdate [kreg] | Kerberos Registration |
| 1109 | KPOP | Kerberos Post Office Agreement (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 management tool |
| 106 | Poppassd | Post Office Protocol Password Change Daemon (POPPASSD) |
| 465/tcp | SMTPS | Simple Mail Transfer Protocol (SMTPS) over Secure Sockets Layer |
| 616/tcp | GII | Using the gateway's (routing daemon) interactive interface |
| 808 | Omarr [omirrd] | Online mirroring (Omirr) file mirroring service |
| 871/tcp | Supfileserv | Software Upgrade Protocol (SUP) server |
| 901/tcp | SWAT | Samba Web management 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 Error Tracking System |
| 2003/tcp | Cfinger | GNU Finger Service |
| 2150 | ninstall | Network installation service |
| 2988 | Afbackup | Afbackup client-server backup system |
| 3128/tcp | Squid | Squid 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 Record 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 |
| 8008 | http-alt | Another option for the 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] | Parallel Mandelbrot Generator for the X Window System |
| 10081 | Kamanda | Use Kerberos Amanda backup service |
| 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 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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