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31 Cards in this Set

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Port - 7

Echo - Tcp or UDP - Echo - Testing round-trip times between hosts.

Port - 19

CHARGEN - TCP or UDP - Character Generator - Testing and debugging.

Port - 21

FTP - TCP - File Transfer Protocol - Transfers files from host to host.

Port - 22

SSH - TCP or UDP - Secure Shell - Remotely administers network devices and Unix/Linux systems. Also used by Secure Copy(SCP) and Secure FTP(SFTP), which both use TCP as the transport mechanism.

Port - 23

Telnet - TCP or UDP - TErminal NETwork - Remotely administers network devices (deprecated).

Port - 25

SMTP - TCP - Simple Mail Transfer Protocol - Sends e-mail.

Port - 49

TACACS+ - TCP - Terminal Access Controller Access-Control System Plus - Remote authentication - Can also use UDP, but TCP is the default. Compare to RADIUS.

Port - 53

DNS - TCP or UDP - Doman Name System - Resolves hostnames to IP addresses and vice-versa.

Port - 69

TFTP - UDP - Trivial File Transfer Protocol - Basic version of FTP.

Port - 80

HTTP - TCP - Hypertext Transfer Protocol - Transmits web page data.

Port - 88

Kerberos - TCP or UDP - Network Authentication, uses tickets.

Port - 110

POP3 - TCP - Post Office Protocol Version 3 - Receives e-mail.

Port - 119

NNTP - TCP - Network News Transfer Protocol - Transports Usenet articles.

Port - 135

RPC/epmap/dcom-scm - TCP or UDP - Microsoft End Point Mapper/ DCE Endpoint Resolution - Used to locate DCOM ports. Also known as RPC (Remote Procedure Call).

Port 137-139

NetBIOS - TCP or UDP - NetBIOS Name. Datagram and Session Services, respectively - Name querying, sending data. NetBIOS connections.

Port - 143

IMAP - TCP - Internet Message Access Protocol - Remotely monitor network devices.

Port - 161

SNMP - UDP - Simple Network Management Protocol - Remotely monito network devices.

Port - 162

SNMPTRAP - TCP or UDP - Simple Network Management Protocol TRAP - Traps and InformRequests are sent to the SNMP Manager on this port.

Port - 389

LDAP - TCP or UDP - Lightweight Directory Access Protocol - Maintains directories of users and other objects.

Port - 443

HTTPS - TCP - Hypertext Transfer Protocol Secure - Secure transfer of hypertext through web pages (uses TLS or SSL).

Port - 445

SMB - TCP - Server Message Block - Provides Shared access to files and other resources.

Port - 514

Syslog - UDP - Syslog Protocol - Used for computer message logging, especially for router and firewall logs.




A secure version (Syslog over TLS) uses TCP as the transport mechanism and port 6514.

Port - 636

LDAP over TLS/SSL - TCP or UDP - Lightweight Directory Access Protocol (Over TLS/SSL) - Secure version of LDAP.

Port - 860

iSCI - TCP - Internet Small Computer System Interface - IP - based protocol used for linking data storage facilities.




Also uses port 3260 for the iSCI target.

Port - 989/990

FTPS - TCP or UDP - FTP Secure - Uses SSL/TLS to secure FTP Transmissions. 990 is the control port and 989 is the data port.

Port - 1433

Ms-sql-s - TCP - Microsoft SQL Server - Opens queries to SQL server.

Port - 1701

L2TP - UDP - Layer 2 Tunneling protocol - VPN protocol with no inherent security. Often used with IPsec.

Port - 1723

PPTP - TCP or UDP - Point-to-point Tunneling Protocol - VPN protocol with built in security.

Port - 1812/1813

RADIUS - UDP - Remote Authentication Dial-In User Service - An AAA protocol used for authentication (port 1812), authorization, and accounting (port 1813) of users that connect to networks and network services. UDP is the default but as of 2012 cab use TCP as well. Compare with TACACS+.




Other common ports include 1645 and 1646.

Port - 3225

FCIP - TCP or UDP - Fibre Channel over Internet Protocol - Encapsulates Fibre Channel frames within TCP/IP packets.




Contrast with Fibre Channel over Ethernet (FCoE), which relies on the data link layer and doesn't rely directly on TCP/IP.

Port - 3389

RDP - TCP or UDP - Remote Desktop Protocol (Microsoft Terminal Server) - Remotely views and controls other Windows systems.