Basic Common Ports

Common ports, such as TCP port 80 (HTTP), may be locked down — but other ports may get overlooked and be vulnerable to hackers. In your security tests, be sure to check these commonly hacked TCP and UDP ports:


Port TCP UDP Description
9   UDP Wake-on-LAN
13 TCP UDP Daytime Protocol
20 TCP UDP File Transfer Protocol (FTP) data transfer
21 TCP\SCTP12 UDP File Transfer Protocol (FTP) control (command)
22 TCP\SCTP UDP Secure Shell (SSH), secure logins, file transfers (scp, sftp) and port forwarding
23 TCP UDP Telnet protocol—unencrypted text communications
25 TCP UDP Simple Mail Transfer Protocol (SMTP), used for e-mail routing between mail servers
37 TCP UDP Time Protocol
43 TCP UDP WHOIS protocol
49 TCP UDP TACACS+ Login Host protocol
53 TCP UDP Domain Name System (DNS)
69 TCP UDP Trivial File Transfer Protocol (TFTP)
79 TCP UDP Finger protocol
80 TCP\SCTP UDP[44] Hypertext Transfer Protocol (HTTP)
88 TCP UDP Kerberos authentication system
107 TCP UDP Remote User Telnet Service (RTelnet)
109 TCP UDP Post Office Protocol, version 2 (POP2)
110 TCP UDP Post Office Protocol, version 3 (POP3)
111 TCP UDP Open Network Computing Remote Procedure Call (ONC RPC, sometimes referred to as Sun RPC)
113 TCP   Ident, authentication service/identification protocol,used by IRC servers to identify users
113 TCP UDP Authentication Service (auth), the precedessor to identification protocol. Used to determine an user’s identity of a particular TCP connection.
115 TCP UDP Simple File Transfer Protocol
123 TCP UDP Network Time Protocol (NTP), used for time synchronization
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
137 TCP UDP NetBIOS Name Service, used for name registration and resolution
138 TCP UDP NetBIOS Datagram Service
139 TCP UDP NetBIOS Session Service
143 TCP UDP Internet Message Access Protocol (IMAP), management of electronic mail messages on a server
152 TCP UDP Background File Transfer Program (BFTP)
153 TCP UDP Simple Gateway Monitoring Protocol (SGMP), a protocol for remote inspection and alteration of gateway management information
161 TCP UDP Simple Network Management Protocol (SNMP)
162 TCP UDP Simple Network Management Protocol Trap (SNMPTRAP)(citation needed]
179 TCP\SCTP UDP Border Gateway Protocol (BGP),[72] used to exchange routing and reachability information among autonomous systems (AS) on theInternet
199 TCP UDP SMUX, SNMP Unix Multiplexer[importance?]
209 TCP UDP Quick Mail Transfer Protocol
220 TCP UDP Internet Message Access Protocol (IMAP), version 3
311 TCP   Mac OS X Server Admin (officially AppleShare IP Web administration)
384 TCP UDP A Remote Network Server System
389 TCP UDP Lightweight Directory Access Protocol (LDAP)
427 TCP UDP Service Location Protocol (SLP)
434 TCP UDP Mobile IP Agent (RFC 5944)
443 TCP\SCTP UDP Hypertext Transfer Protocol over TLS/SSL (HTTPS)
444 TCP UDP Simple Network Paging Protocol (SNPP)
445 TCP   Microsoft-DS Active Directory, Windows shares
445 TCP   Microsoft-DS SMB file sharing
465 TCP   URL Rendezvous Directory for SSM (Cisco protocol)
464 TCP UDP Kerberos Change/Set password
513 TCP   rlogin
514 TCP   Remote Shell, used to execute non-interactive commands on a remote system (Remote Shell, rsh, remsh)
514   UDP Syslog,used for system logging
515 TCP   Line Printer Daemon (LPD), print service
543 TCP   klogin, Kerberos login
544 TCP   kshell, Kerberos Remote shell
546 TCP UDP DHCPv6 client
547 TCP UDP DHCPv6 server
548 TCP   Apple Filing Protocol (AFP) over TCP[11]
587 TCP   e-mail message submission(SMTP)
631 TCP UDP Internet Printing Protocol (IPP)[11]
636 TCP UDP Lightweight Directory Access Protocol over TLS/SSL (LDAPS)
646 TCP UDP Label Distribution Protocol (LDP), a routing protocol used in MPLS networks
674 TCP   Application Configuration Access Protocol (ACAP)
691 TCP   MS Exchange Routing
873 TCP   rsync file synchronization protocol
989 TCP UDP FTPS Protocol (data), FTP over TLS/SSL
990 TCP UDP FTPS Protocol (control), FTP over TLS/SSL
991 TCP UDP Netnews Administration System (NAS)[100]
992 TCP UDP Telnet protocol over TLS/SSL
993 TCP   Internet Message Access Protocol over TLS/SSL (IMAPS)
994 TCP UDP Internet Relay Chat over TLS/SSL (IRCS)[73]
995 TCP   Post Office Protocol 3 over TLS/SSL (POP3S)[11]
1027   UDP Native IPv6 behind IPv4-to-IPv4 NAT Customer Premises Equipment
1029     Microsoft DCOM services
1433 TCP UDP Microsoft SQL Server database management system (MSSQL) server
1521 TCP UDP nCube License Manager
1720 TCP UDP H.323 call signaling
1723 TCP UDP Point-to-Point Tunneling Protocol (PPTP)[11]
1755 TCP UDP Microsoft Media Services (MMS, ms-streaming)
2000 TCP UDP Cisco Skinny Client Control Protocol (SCCP)
2049 TCP UDP Network File System (NFS)[11]
3000 TCP   Ruby on Rails development default[143]
3128 TCP ? Squid caching web proxy[147]
3306 TCP UDP MySQL database system
3389 TCP UDP Microsoft Terminal Server (RDP) officially registered as Windows Based Terminal (WBT)
4899 TCP UDP Radmin remote administration tool
5000 TCP   commplex-main
5051 TCP   ita-agent Symantec Intruder Alert
5060 TCP UDP Session Initiation Protocol (SIP)
5190 TCP   AOL Instant Messenger protocol
5357 TCP UDP Web Services for Devices (WSDAPI) (only provided by Windows Vista, Windows 7 and Server 2008)
5432 TCP UDP PostgreSQL database system
5631 TCP   pcANYWHEREdata, Symantec pcAnywhere (version 7.52 and later  data
5666 TCP   NRPE (Nagios)
5800 TCP   VNC remote desktop protocol over HTTP
5900 TCP UDP Remote Frame Buffer protocol (RFB)
6000-6063 TCP UDP X11—used between an X client and server over the network
6262 TCP   Sybase Advantage Database Server
6646   UDP McAfee Network Agent[citation needed]
7070 TCP UDP Real Time Streaming Protocol (RTSP), used by QuickTime Streaming Server. TCP is used by default, UDP is used as an alternate.
8000 TCP UDP iRDMI (Intel Remote Desktop Management Interface)—sometimes erroneously used instead of port 8080
8008 TCP   HTTP Alternate
8009 TCP   ajp13—Apache JServ Protocol AJP Connector
8080 TCP   HTTP alternate (http_alt)—commonly used for Web proxy and caching server, or for running a Web server as a non-root user
8081 TCP   HTTP alternate, VibeStreamer, e.g. McAfee ePolicy Orchestrator (ePO)
8443 TCP   SW Soft Plesk Control Panel
8888 TCP   HyperVM HTTPS
9100 TCP UDP PDL Data Stream, used for printing to certain network printers
10000 TCP UDP Network Data Management Protocol

Author: mypenetrationtest

Passionate about any related to information security. Like things to be more hands on than theory .. Interested in learning about offensive security, Underground Cyber Markets, Cyber counter Intelligence and various other aspects.

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