Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP. Service names are assigned on a first-come, first-served process, as documented in [RFC6335]. Port numbers are assigned in various ways, based on three ranges: System Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private Ports (49152-65535); the difference uses of these ranges is described in [RFC6335]. System Ports are assigned by IETF process for standards-track protocols, as per [RFC6335]. User Ports are assigned by IANA using the "IETF Review" process, the "IESG Approval" process, or the "Expert Review" process, as per [RFC6335]. Dynamic Ports are not assigned. The registration procedures for service names and port numbers are described in [RFC6335]. Assigned ports both System and User ports SHOULD NOT be used without or prior to IANA registration. ************************************************************************ * PLEASE NOTE THE FOLLOWING: * * * * ASSIGNMENT OF A PORT NUMBER DOES NOT IN ANY WAY IMPLY AN * * ENDORSEMENT OF AN APPLICATION OR PRODUCT, AND THE FACT THAT NETWORK * * TRAFFIC IS FLOWING TO OR FROM A REGISTERED PORT DOES NOT MEAN THAT * * IT IS "GOOD" TRAFFIC, NOR THAT IT NECESSARILY CORRESPONDS TO THE * * ASSIGNED SERVICE. FIREWALL AND SYSTEM ADMINISTRATORS SHOULD * * CHOOSE HOW TO CONFIGURE THEIR SYSTEMS BASED ON THEIR KNOWLEDGE OF * * THE TRAFFIC IN QUESTION, NOT WHETHER THERE IS A PORT NUMBER * * REGISTERED OR NOT. *
Port TCP UDP Description Status
0 UDP Reserved Official
1 TCP UDP TCP Port Service Multiplexer (TCPMUX) Official
2 TCP UDP CompressNET Management Utility Official
3 TCP UDP CompressNET Compression Process Official
4 TCP UDP Unassigned Official
5 TCP UDP Remote Job Entry Official
7 TCP UDP Echo Protocol Official
8 TCP UDP Unassigned Official
9 TCP UDP Discard Protocol Official
10 TCP UDP Unassigned Official
11 TCP UDP Active Users (systat service) Official
12 TCP UDP Unassigned Official
13 TCP UDP Daytime Protocol (RFC 867) Official
14 TCP UDP Unassigned Official
15 TCP UDP Previously netstat service Unofficial
16 TCP UDP Unassigned Official
17 TCP UDP Quote of the Day Official
18 TCP UDP Message Send Protocol Official
19 TCP UDP Character Generator Protocol (CHARGEN) Official
20 TCP FTP—data transfer Official
21 TCP FTP—control (command) Official
22 TCP UDP Secure Shell (SSH)—used for secure logins, file transfers (scp, sftp) and port forwarding Official
23 TCP Telnet protocol—unencrypted text communications Official
24 TCP UDP Priv-mail : any private mail system.[citation needed] Official
25 TCP Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers Official
26 TCP UDP Unassigned Official
27 TCP UDP NSW User System FE
Official
29 TCP UDP MSG ICP
Official
33 TCP UDP Display Support Protocol
Official
34 TCP UDP Remote File (RF)—used to transfer files between machines
Unofficial
35 TCP UDP Any private printer server protocol
Official
37 TCP UDP TIME protocol Official
39 TCP UDP Resource Location Protocol (RLP)—used for determining the location of higher level services from hosts on a network Official
40 TCP UDP Unassigned Official
42 TCP UDP ARPA Host Name Server Protocol Official
42 TCP UDP Windows Internet Name Service Unofficial
43 TCP WHOIS protocol Official
47 TCP UDP NI FTP Official
49 TCP UDP TACACS Login Host protocol
Official
50 TCP UDP Remote Mail Checking Protocol Official
51 TCP UDP IMP Logical Address Maintenance
Official
52 TCP UDP XNS (Xerox Network Systems) Time Protocol Official
53 TCP UDP Domain Name System (DNS) Official
54 TCP UDP XNS (Xerox Network Systems) Clearinghouse Official
55 TCP UDP ISI Graphics Language (ISI-GL)
Official
56 TCP UDP XNS (Xerox Network Systems) Authentication Official
56 TCP UDP Route Access Protocol (RAP) Unofficial
57 TCP Mail Transfer Protocol (RFC 780) Unofficial
58 TCP UDP XNS (Xerox Network Systems) Mail Official
67 UDP Bootstrap Protocol (BOOTP) Server; also used by Dynamic Host Configuration Protocol (DHCP) Official
68 UDP Bootstrap Protocol (BOOTP) Client; also used by Dynamic Host Configuration Protocol (DHCP) Official
69 UDP Trivial File Transfer Protocol (TFTP) Official
70 TCP Gopher protocol Official
71 TCP NETRJS protocol Official
72 TCP NETRJS protocol Official
73 TCP NETRJS protocol Official
74 TCP NETRJS protocol Official
79 TCP Finger protocol Official
80 TCP UDP Hypertext Transfer Protocol (HTTP) Official
81 TCP Torpark—Onion routing Unofficial
82 UDP Torpark—Control Unofficial
88 TCP UDP Kerberos—authentication system
Official
90 TCP UDP dnsix (DoD Network Security for Information Exchange) Securit Attribute Token Map
Official
90 TCP UDP Pointcast Unofficial
99 TCP WIP Message protocol Unofficial
101 TCP NIC host name Official
102 TCP ISO-TSAP (Transport Service Access Point) Class 0 protocol Official
104 TCP UDP ACR/NEMA Digital Imaging and Communications in Medicine Official
105 TCP UDP CCSO Nameserver Protocol (Qi/Ph) Official
107 TCP Remote TELNET Service protocol Official
108 TCP UDP SNA Gateway Access Server Official
109 TCP Post Office Protocol v2 (POP2) Official
110 TCP Post Office Protocol v3 (POP3) Official
111 TCP UDP ONC RPC (SunRPC) Official
113 TCP ident—Authentication Service/Identification Protocol, used by IRC servers to identify users Official
113 UDP Authentication Service (auth) Official
115 TCP Simple File Transfer Protocol (SFTP) Official
117 TCP UUCP Path Service Official
118 TCP UDP SQL (Structured Query Language) Services Official
119 TCP Network News Transfer Protocol (NNTP)—retrieval of newsgroup messages Official
123 UDP Network Time Protocol (NTP)—used for time synchronization Official
135 TCP UDP DCE endpoint resolution Official
135 TCP UDP Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service, used to remotely manage services including DHCP server, DNS server and WINS. Also used by DCOM Unofficial
137 TCP UDP NetBIOS NetBIOS Name Service Official
138 TCP UDP NetBIOS NetBIOS Datagram Service Official
139 TCP UDP NetBIOS NetBIOS Session Service Official
143 TCP Internet Message Access Protocol (IMAP)—management of email messages Official
152 TCP UDP Background File Transfer Program (BFTP) Official
153 TCP UDP SGMP, Simple Gateway Monitoring Protocol Official
156 TCP UDP SQL Service Official
158 TCP UDP DMSP, Distributed Mail Service Protocol Unofficial
161 UDP Simple Network Management Protocol (SNMP) Official
162 TCP UDP Simple Network Management Protocol Trap (SNMPTRAP) Official
170 TCP Print-srv, Network PostScript[citation needed] Official
175 TCP VMNET (IBM z/VM, z/OS & z/VSE - Network Job Entry(NJE))[citation needed] Official
177 TCP UDP X Display Manager Control Protocol (XDMCP) Official
179 TCP BGP (Border Gateway Protocol) Official
194 TCP UDP Internet Relay Chat (IRC) Official
199 TCP UDP SMUX, SNMP Unix Multiplexer Official
201 TCP UDP AppleTalk Routing Maintenance Official
209 TCP UDP The Quick Mail Transfer Protocol Official
210 TCP UDP ANSI Z39.50 Official
213 TCP UDP Internetwork Packet Exchange (IPX) Official
218 TCP UDP Message posting protocol (MPP) Official
220 TCP UDP Internet Message Access Protocol (IMAP), version 3 Official
256 TCP UDP 2DEV "2SP" Port
Unofficial
259 TCP UDP ESRO, Efficient Short Remote Operations
Official
264 TCP UDP BGMP, Border Gateway Multicast Protocol Official
280 TCP UDP http-mgmt Official
308 TCP Novastor Online Backup Official
311 TCP Mac OS X Server Admin (official
ly AppleShare IP Web administration)
Official
318 TCP UDP PKIX TSP, Time Stamp Protocol Official
319 UDP Precision time protocol event messages Official
320 UDP Precision time protocol general messages Official
323 TCP UDP IMMP, Internet Message Mapping Protocol
Unofficial
350 TCP UDP MATIP-Type A, Mapping of Airline Traffic over Internet Protocol
Official
351 TCP UDP MATIP-Type B, Mapping of Airline Traffic over Internet Protocol
Official
366 TCP UDP ODMR, On-Demand Mail Relay
Official
369 TCP UDP Rpc2portmap
Official
370 TCP codaauth2—Coda authentication server
Official
370 UDP codaauth2—Coda authentication server
Official
370 UDP securecast1—Outgoing packets to NAI's servers
Unofficial
371 TCP UDP ClearCase albd
Official
383 TCP UDP HP data alarm manager
Official
384 TCP UDP A Remote Network Server System
Official
387 TCP UDP AURP, AppleTalk Update-based Routing Protocol Official
389 TCP UDP Lightweight Directory Access Protocol (LDAP) Official
401 TCP UDP UPS Uninterruptible Power Supply
Official
402 TCP Altiris, Altiris Deployment Client
Unofficial
411 TCP Direct Connect Hub Unofficial
412 TCP Direct Connect Client-to-Client Unofficial
427 TCP UDP Service Location Protocol (SLP) Official
443 TCP HTTPS (Hypertext Transfer Protocol over SSL/TLS) Official
444 TCP UDP SNPP, Simple Network Paging Protocol (RFC 1568) Official
445 TCP Microsoft-DS Active Directory, Windows shares Official
445 TCP Microsoft-DS SMB file sharing Official
464 TCP UDP Kerberos Change/Set password Official
465 TCP Cisco protocol
Unofficial
465 TCP SMTP over SSL Unofficial
475 TCP UDP tcpnethaspsrv (Aladdin Knowledge Systems Hasp services, TCP/IP version)
Official
497 TCP Dantz Retrospect Official
500 TCP Qmatic Qwin communication port
Unofficial
500 UDP Internet Security Association and Key Management Protocol (ISAKMP) Official
501 TCP STMF, Simple Transportation Management Framework—DOT NTCIP 1101[citation needed] Unofficial
502 TCP UDP asa-appl-proto, Protocol
Unofficial
502 TCP UDP Modbus, Protocol Unofficial
504 TCP UDP Citadel—multiservice protocol for dedicated clients for the Citadel groupware system Official
510 TCP First Class Protocol
Unofficial
512 TCP Rexec, Remote Process Execution Official
512 UDP comsat, together with biff Official
513 TCP rlogin Official
513 UDP Who
Official
514 TCP Shell—used to execute non-interactive commands on a remote system (Remote Shell, rsh, remsh) Official
514 UDP Syslog—used for system logging Official
515 TCP Line Printer Daemon—print service Official
517 UDP Talk
Official
518 UDP NTalk
Official
520 TCP efs, extended file name server
Official
520 UDP Routing Information Protocol (RIP) Official
524 TCP UDP NetWare Core Protocol (NCP) is used for a variety things such as access to primary NetWare server resources, Time Synchronization, etc. Official
525 UDP Timed, Timeserver
Official
530 TCP UDP RPC
Official
531 TCP UDP AOL Instant Messenger Unofficial
532 TCP netnews
Official
533 UDP netwall, For Emergency Broadcasts
Official
540 TCP UUCP (Unix-to-Unix Copy Protocol) Official
542 TCP UDP commerce (Commerce Applications)
Official
543 TCP klogin, Kerberos login Official
544 TCP kshell, Kerberos Remote shell Official
545 TCP OSIsoft PI (VMS), OSISoft PI Server Client Access Unofficial
546 TCP UDP DHCPv6 client Official
547 TCP UDP DHCPv6 server Official
548 TCP Apple Filing Protocol (AFP) over TCP Official
550 UDP new-rwho, new-who
Official
554 TCP UDP Real Time Streaming Protocol (RTSP) Official
556 TCP Remotefs, RFS, rfs_server Official
560 UDP rmonitor, Remote Monitor
Official
561 UDP monitor
Official
563 TCP UDP NNTP protocol over TLS/SSL (NNTPS) Official
587 TCP e-mail message submission (SMTP) Official
591 TCP FileMaker 6.0 (and later) Web Sharing (HTTP Alternate, also see port 80) Official
593 TCP UDP HTTP RPC Ep Map, Remote procedure call over Hypertext Transfer Protocol, often used by Distributed Component Object Model services and Microsoft Exchange Server Official
604 TCP TUNNEL profile,[21] a protocol for BEEP peers to form an application layer tunnel Official
623 UDP ASF Remote Management and Control Protocol (ASF-RMCP)[citation needed] Official
631 TCP UDP Internet Printing Protocol (IPP) Official
631 TCP UDP Common Unix Printing System (CUPS) Unofficial
635 TCP UDP RLZ DBase[citation needed] Official
636 TCP UDP Lightweight Directory Access Protocol over TLS/SSL (LDAPS) Official
639 TCP UDP MSDP, Multicast Source Discovery Protocol Official
641 TCP UDP SupportSoft Nexus Remote Command (control/listening): A proxy gateway connecting remote control traffic[citation needed] Official
646 TCP UDP LDP, Label Distribution Protocol, a routing protocol used in MPLS networks Official
647 TCP DHCP Failover protocol[22] Official
648 TCP RRP (Registry Registrar Protocol)[23] Official
651 TCP UDP IEEE-MMS[citation needed] Official
652 TCP DTCP, Dynamic Tunnel Configuration Protocol[citation needed] Unofficial
653 TCP UDP SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic[citation needed] Official
654 TCP Media Management System (MMS) Media Management Protocol (MMP)[24] Official
657 TCP UDP IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)[25] and Hardware Management Console to connect managed logical partitions (LPAR) to enable dynamic partition reconfiguration Official
660 TCP Mac OS X Server administration Official
665 TCP sun-dr, Remote Dynamic Reconfiguration[citation needed] Unofficial
666 UDP Doom, first online first-person shooter Official
674 TCP ACAP (Application Configuration Access Protocol) Official
691 TCP MS Exchange Routing Official
694 TCP UDP Linux-HA High availability Heartbeat Official
695 TCP IEEE-MMS-SSL (IEEE Media Management System over SSL)[26] Official
698 UDP OLSR (Optimized Link State Routing) Official
700 TCP EPP (Extensible Provisioning Protocol), a protocol for communication between domain name registries and registrars (RFC 5734) Official
701 TCP LMP (Link Management Protocol (Internet)),[27] a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links Official
702 TCP IRIS[28][29] (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol)[30] (RFC 3983) Official
706 TCP Secure Internet Live Conferencing (SILC) Official
711 TCP Cisco Tag Distribution Protocol[31][32][33]—being replaced by the MPLS Label Distribution Protocol[34] Official
712 TCP Topology Broadcast based on Reverse-Path Forwarding routing protocol (TBRPF) (RFC 3684) Official
712 UDP Promise RAID Controller[citation needed] Unofficial
720 TCP SMQP, Simple Message Queue Protocol[citation needed] Unofficial
749 TCP UDP Kerberos (protocol) administration Official
750 UDP kerberos-iv, Kerberos version IV Official
751 TCP UDP kerberos_master, Kerberos authentication Unofficial
752 UDP passwd_server, Kerberos Password (kpasswd) server Unofficial
753 TCP Reverse Routing Header (rrh)[35] Official
753 UDP Reverse Routing Header (rrh) Official
753 UDP userreg_server, Kerberos userreg server Unofficial
754 TCP tell send[citation needed] Official
754 TCP krb5_prop, Kerberos v5 slave propagation Unofficial
754 UDP tell send[citation needed] Official
760 TCP UDP krbupdate [kreg], Kerberos registration Unofficial
782 TCP Conserver serial-console management server Unofficial
783 TCP SpamAssassin spamd daemon Unofficial
808 TCP Microsoft Net.TCP Port Sharing Service[citation needed] Official
829 TCP CMP (Certificate Management Protocol)[citation needed] Unofficial
843 TCP Adobe Flash[36] Unofficial
847 TCP DHCP Failover protocol Official
848 TCP UDP Group Domain Of Interpretation (GDOI) protocol[citation needed] Official
860 TCP iSCSI (RFC 3720) Official
873 TCP rsync file synchronisation protocol Official
USA only
888 TCP cddbp, CD DataBase (CDDB) protocol (CDDBP)—unassigned but widespread use Unofficial
901 TCP Samba Web Administration Tool (SWAT) Unofficial
901 TCP VMware Virtual Infrastructure Client (UDP from server being managed to management console) Unofficial
901 UDP VMware Virtual Infrastructure Client (UDP from server being managed to management console) Unofficial
902 TCP ideafarm-door[citation needed] Official
902 TCP VMware Server Console (TCP from management console to server being Managed) Unofficial
902 UDP ideafarm-door[citation needed] Official
902 UDP VMware Server Console (UDP from server being managed to management console) Unofficial
903 TCP VMware Remote Console [37] Unofficial
904 TCP VMware Server Alternate (if 902 is in use, i.e. SUSE linux) Unofficial
911 TCP Network Console on Acid (NCA)—local tty redirection over OpenSSH Unofficial
944 UDP Network File System (protocol) Service Unofficial
953 TCP UDP Domain Name System (DNS) RNDC Service Unofficial
973 UDP Network File System (protocol) over IPv6 Service Unofficial
981 TCP SofaWare Technologies Remote HTTPS management for firewall devices running embedded Check Point FireWall-1 software Unofficial
987 TCP Microsoft This Secure Hypertext Transfer Protocol (HTTPS) port makes Windows SharePoint Services viewable through Remote Web Workplace[citation needed] Unofficial
989 TCP UDP FTPS Protocol (data): FTP over TLS/SSL Official
990 TCP UDP FTPS Protocol (control): FTP over TLS/SSL Official
991 TCP UDP NAS (Netnews Administration System)[38] Official
992 TCP UDP TELNET protocol over TLS/SSL Official
993 TCP Internet Message Access Protocol over SSL (IMAPS) Official
995 TCP Post Office Protocol 3 over TLS/SSL (POP3S) Official
999 TCP ScimoreDB Database System[citation needed] Unofficial
1002 TCP Opsware agent (aka cogbot)[citation needed] Unofficial
1023 TCP UDP Reserved[1]
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