Port |
TCP |
UDP |
Description |
Status |
| 0 |
|
UDP |
Reserved |
Official |
| 1 |
TCP |
UDP |
TCP Port Service Multiplexer (TCPMUX) |
Official |
| 2 |
TCP |
UDP |
Management Utility |
Official |
| 3 |
TCP |
UDP |
Compression Process |
Official |
| 4 |
TCP |
UDP |
Unassigned |
Official |
| 5 |
TCP |
UDP |
Remote Job Entry |
Official |
| 6 |
TCP |
UDP |
Unassigned |
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[2]) |
Official |
| 12 |
TCP |
UDP |
Unassigned |
Official |
| 13 |
TCP |
UDP |
Daytime Protocol (RFC 867) |
Official |
| 14 |
TCP |
UDP |
Unassigned |
Official |
| 15 |
TCP |
UDP |
netstat service[2] |
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. |
Official |
| 25 |
TCP |
|
Simple Mail Transfer Protocol (SMTP)—used for e-mail routing between mail servers |
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[3] (RLP)—used for determining the location of higher level services from hosts on a network |
Official |
| 41 |
TCP |
UDP |
Graphics |
Official |
| 42 |
TCP |
UDP |
nameserver, ARPA Host Name Server Protocol |
Official |
| 42 |
TCP |
UDP |
WINS |
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) |
Unofficial |
| 56 |
TCP |
UDP |
XNS (Xerox Network Systems) Authentication |
Official |
| 56 |
TCP |
UDP |
Route Access Protocol (RAP)[4] |
Unofficial |
| 57 |
TCP |
|
Mail Transfer Protocol (MTP) |
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 |
| 79 |
TCP |
|
Finger protocol |
Official |
| 80 |
TCP |
UDP |
Hypertext Transfer Protocol (HTTP) |
Official |
| 81 |
TCP |
|
Torpark—Onion routing |
Unofficial |
| 82 |
|
UDP |
Torpark—Control |
Unofficial |
| 83 |
TCP |
|
MIT ML Device |
Official |
| 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[5] |
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[6] protocol |
Official |
| 108 |
TCP |
UDP |
SNA Gateway Access Server [7] |
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—user identification system, used by IRC servers to identify users |
Official |
| 113 |
TCP |
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[8], 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 |
UDP |
Internet Message Access Protocol (IMAP) — management of email messages |
Official |
| 152 |
TCP |
UDP |
Background File Transfer Program (BFTP)[9] |
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)[10] |
Official |
| 170 |
TCP |
|
Print-srv, Network PostScript |
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 |
| 308 |
TCP |
|
Novastor Online Backup |
Official |
| 311 |
TCP |
|
Mac OS X Server Admin (officially 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 |
UDP |
codaauth2 – Coda authentication server |
Unofficial |
| 370 |
TCP |
UDP |
securecast1 – Outgoing packets to NAI’s servers, http://www.nai.com/asp_set/anti_virus/alerts/faq.as |
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 |
|
tcpnethaspsrv (Aladdin Knowledge Systems Hasp services, TCP/IP version) |
Official |
| 497 |
TCP |
|
Dantz Retrospect |
Official |
| 500 |
_ |
UDP |
Internet Security Association and Key Management Protocol (ISAKMP) |
Official |
| 501 |
TCP |
|
STMF, Simple Transportation Management Framework – DOT NTCIP 1101 |
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, IRC |
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[11] (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[12], a protocol for BEEP peers to form an application layer tunnel |
Official |
| 623 |
|
UDP |
ASF Remote Management and Control Protocol (ASF-RMCP) |
Official |
| 631 |
TCP |
UDP |
Internet Printing Protocol (IPP) |
Official |
| 631 |
TCP |
UDP |
Common Unix Printing System (CUPS) |
Unofficial |
| 635 |
TCP |
UDP |
RLZ DBase |
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 |
Official |
| 646 |
TCP |
UDP |
LDP, Label Distribution Protocol, a routing protocol used in MPLS networks |
Official |
| 647 |
TCP |
|
DHCP Failover protocol[13] |
Official |
| 648 |
TCP |
|
RRP (Registry Registrar Protocol)[14] |
Official |
| 651 |
TCP |
UDP |
IEEE-MMS |
Official |
| 652 |
TCP |
|
DTCP, Dynamic Tunnel Configuration Protocol |
Unofficial |
| 653 |
TCP |
UDP |
SupportSoft Nexus Remote Command (data): A proxy gateway connecting remote control traffic |
Official |
| 654 |
TCP |
|
Media Management System (MMS) Media Management Protocol (MMP)[15] |
Official |
| 657 |
TCP |
UDP |
IBM RMC (Remote monitoring and Control) protocol, used by System p5 AIX Integrated Virtualization Manager (IVM)[16] 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 |
Unofficial |
| 666 |
|
UDP |
Doom, first online first-person shooter |
Official |
| 674 |
TCP |
|
ACAP (Application Configuration Access Protocol) |
Official |
| 691 |
TCP |
|
MS Exchange Routing |
Official |
| 692 |
TCP |
|
Hyperwave-ISP |
Official |
| 694 |
TCP |
UDP |
Linux-HA High availability Heartbeat |
Official |
| 695 |
TCP |
|
IEEE-MMS-SSL (IEEE Media Management System over SSL)[17] |
Official |
| 698 |
|
UDP |
OLSR (Optimized Link State Routing) |
Official |
| 699 |
TCP |
|
Access Network |
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))[18], a protocol that runs between a pair of nodes and is used to manage traffic engineering (TE) links |
Official |
| 702 |
TCP |
|
IRIS[19][20] (Internet Registry Information Service) over BEEP (Blocks Extensible Exchange Protocol)[21] (RFC 3983) |
Official |
| 706 |
TCP |
|
Secure Internet Live Conferencing (SILC) |
Official |
| 711 |
TCP |
|
Cisco Tag Distribution Protocol[22][23][24]—being replaced by the MPLS Label Distribution Protocol[25] |
Official |
| 712 |
TCP |
|
Topology Broadcast based on Reverse-Path Forwarding routing protocol (TBRPF) (RFC 3684) |
Official |
| 712 |
|
UDP |
Promise RAID Controller |
Unofficial |
| 720 |
TCP |
|
SMQP, Simple Message Queue Protocol |
Unofficial |
| 749 |
TCP |
UDP |
Kerberos (protocol) administration |
Official |
| 750 |
TCP |
|
rfile |
Official |
| 750 |
|
UDP |
loadav |
Official |
| 750 |
|
UDP |
kerberos-iv, Kerberos version IV |
Official |
| 751 |
TCP |
UDP |
pump |
Official |
| 751 |
TCP |
UDP |
kerberos_master, Kerberos authentication |
Unofficial |
| 752 |
TCP |
|
qrh |
Official |
| 752 |
|
UDP |
qrh |
Official |
| 752 |
|
UDP |
passwd_server, Kerberos Password (kpasswd) server |
Unofficial |
| 753 |
TCP |
|
Reverse Routing Header (rrh)[26] |
Official |
| 753 |
|
UDP |
Reverse Routing Header (rrh) |
Official |
| 753 |
|
UDP |
userreg_server, Kerberos userreg server |
Unofficial |
| 754 |
TCP |
|
tell send |
Official |
| 754 |
TCP |
|
krb5_prop, Kerberos v5 slave propagation |
Unofficial |
| 754 |
|
UDP |
tell send |
Official |
| 760 |
TCP |
UDP |
ns |
Official |
| 760 |
TCP |
UDP |
krbupdate [kreg], Kerberos registration |
Unofficial |
| 782 |
TCP |
|
Conserver serial-console management server |
Unofficial |
| 783 |
TCP |
|
SpamAssassin spamd daemon |
Unofficial |
| 829 |
TCP |
|
CMP (Certificate Management Protocol) |
Unofficial |
| 843 |
TCP |
|
Adobe Flash socket policy server |
Unofficial |
| 847 |
TCP |
|
DHCP Failover protocol |
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 902/tcp self documenting Door: send 0x00 for info |
Official |
| 902 |
TCP |
|
VMware Server Console (TCP from management console to server being Managed) |
Unofficial |
| 902 |
|
UDP |
ideafarm-door |
Official |
| 902 |
|
UDP |
VMware Server Console (UDP from server being managed to management console) |
Unofficial |
| 903 |
TCP |
|
VMware Remote Console [27] |
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 |
| 953 |
TCP |
UDP |
Domain Name System (DNS) RNDC Service |
Unofficial |
| 981 |
TCP |
|
SofaWare Technologies Remote HTTPS management for firewall devices running embedded Check Point FireWall-1 software |
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) |
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 |
Unofficial |
| 1001 |
TCP |
|
JtoMB |
Unofficial |
| 1002 |
TCP |
|
Opsware agent (aka cogbot) |
Unofficial |
| 1222 |
TCP |
|
Suptechnology ERP 2.0 |
Unofficial |
| 1023 |
TCP |
UDP |
Reserved[1] |
Official |