Ports and Protocols Flashcards by Jason Bromberg

HTTP

TCP 80

Hyper Text Transfer Protocol is used to transmit web page data to a client for unsecured web browsing

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FTP

21 TCP

File Transfer Protocol is used to transfer files from host to host

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SSH, SCP, SFTP

22 TCP/UDP

Secure Shell is used to remotely administer network devices and systems. SCP is used for secure copy and SFTP for secure FTP.

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SSH File Transfer Protocol

Secure Shell is used to remotely administer network devices and systems. SCP is used for secure copy and SFTP for secure FTP.

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TACACS+

Terminal Access Controller Access Control System Plus is a Cisco proprietary protocol used for providing centralized authentication, authorization, and accounting services for network devices such as routers, switches, and firewalls.

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DNS

53 TCP/UDP

Domain Name Service is used to translate domain names into IP addresses.

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DHCP

67/68

This network management protocol is used to automatically assign local IP addresses and other network settings to devices on a network.

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Kerberos

88 TCP/UDP

Used for network authentication using a system of tickets within a Windows domain

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POP3

110 TCP

Post Office Protocol v3 is used to receive email from a mail server

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IMAP

TCP 143

Internet Message Access Protocol is used to receive email from a mail server with more features than POP3

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HTTPS

443 TCP

Hyper Text Transfer Protocol Secure is used to transmit web page data to a client over an SSL/TLS-encrypted connection

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SNMP

161 UDP

Simple Network Management Protocol is used to remotely monitor network devices

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LDAP

389 TCP/UDP

Lightweight Directory Access Protocol is used to maintain directories of users and other objects

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LDAPS SSL/TLS

636 TCP/UDP

LDAP is used to maintain directories of users and other objects over an encrypted SSL/TLS connection

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FTPS

989/990 TCP

File Transfer Protocol Secure is used to transfer files from host to host over an encrypted connection

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IMAP4 with SSL/TLS

993 TCP

Internet Message Access Protocol is used to receive email from a mail server over an SSL/TLS-encrypted connection

POP3 (SSL/TLS)

995 TCP

Post Office Protocol v3 is used to receive email from a mail server using an SSL/TLS-encrypted connection

RADIUS

1812/1813 UDP

Remote Authentication Dial-In User Service is used for authentication and authorization (1812) and accounting (1813)

Diameter

3868 TCP

A more advanced AAA protocol that is a replacement for RADIUS

Secure Real Time Protocol (SRTP)

5004

SRTP replaced RTP and is a protocol used to stream audio and video commu

Telnet

23 TCP/UDP

Unencrypted method to remotely administer network devices (should not be used

PPTP

1723 TCP/UDP

Point-to-Point Tunneling Protocol is an underlying VPN protocol with built-in security

SMTP

25 TCP

Simple Mail Transfer Protocol is used to send email over the Internet

NNTP

119 TCP

Network News Transfer Protocol is used to transport Usenet articles

TFTP

69 UDP ## Footnote Hyper Text Transfer Protocol is used to transmit web page data to a client for unsecured web browsing

NetBIOS

137-139 TCP/UDP ## Footnote NetBIOS is used to conduct name querying, sending of data, and other functions over a NetBIOS connection

RPC/DCOM-scm

135 TCP/UDP ## Footnote Remote Procedure Call is used to located DCOM ports request a service from a program on another computer on the network

SMB

445 TCP ## Footnote Server Message Block is used to provide shared access to files and other resources on a network

SMTP with SSL/TLS

465/587 TCP ## Footnote Simple Mail Transfer Protocol used to send email over the Internet with an SSL and TLS secured connection

Syslog

514 UDP ## Footnote Syslog is used to conduct computer message logging, especially for routers and firewall logs

iSCSI

860 TCP ## Footnote iSCSI is used for linking data storage facilities over IP

Ms-sql-s

1433 TCP ## Footnote Microsoft SQL server is used to receive SQL database queries from clients

RADIUS (alternative)

1645/1646 UDP ## Footnote Remote Authentication Dial-In User Service is used for authentication and authorization (1645) and accounting (1646)

L2TP

1701 UDP ## Footnote Layer 2 Tunnel Protocol is used as an underlying VPN protocol but has no inherent security

FCIP

3225 TCP/UDP ## Footnote Fibre Channel IP is used to encapsulate Fibre Channel frames within TCP/IP packets

iSCSI Target

3260 TCP ## Footnote iSCSI Target is as the listening port for iSCSI-targeted devices when linking data storage facilities over IP

RDP

3389 TCP/UDP ## Footnote Remote Desktop Protocol is used to remotely view and control other Windows systems via a Graphical User Interface

Syslog over TLS

6514 TCP ## Footnote It is used to conduct computer message logging, especially for routers and firewall logs, over a TLS-encrypted connection

SNMPTRAP

162 TCP/UDP ## Footnote Used to send Trap and InformRequests to the SNMP Manager on a network