Ports and Protocols Flashcards by Sean Templeton

FTP

TCP

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

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SSH, SCP, SFTP

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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Telnet

TCP/UDP

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

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SMTP

TCP

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

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DNS

TCP/UDP

Domain Name Service is used to resolve hostnames to IPs and IPs to hostnames

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TFTP

UDP

Trivial FTP is used as a simplified version of FTP to put a file on a remote host, or get a file from a remote host

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HTTP

TCP

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

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Kerberos

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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NNTP

119

TCP

Network News Transfer Protocol is used to transport Usenet articles

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RPC/DCOM-scm

135

TCP/UPD

Remote Procedure Call is used to located DCOM ports request a service from a program on another computer on the network

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NetBIOS

137 - 139

TCP/UDP

NetBIOS is used to conduct name querying, sending of data, and other functions over a NetBIOS connection

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IMAP

143

TCP

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

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SNMP

161

UDP

Simple Network Management Protocol is used to remotely monitor network devices

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SNMPTRAP

162

TCP/UDP

Used to send Trap and InformRequests to the SNMP Manager on a network

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LDAP

389

TCP

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

HTTPS

443

TCP/UDP

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

SMB

445

TCP

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

SMTP with SSL/TLS

465/587

TCP

Simple Mail Transfer Protocol used to send email over the Internet with an SSL and TLS secured connection

SysLog

514

UDP

Syslog is used to conduct computer message logging, especially for routers and firewall logs

LDAP SSL/TLS

636

TCP/UDP

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

iSCSI

860

TCP

iSCSI is used for linking data storage facilities over IP

FTPS

989/990

TCP

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

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

Ms-sql-s

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

RADIUS (alternative)

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

L2TP

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

PPTP

1723 TCP/UDP Point-to-Point Tunneling Protocol is an underlying VPN protocol with built-in security

RADIUS

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

FCIP

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

iSCSI Target

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

RDP

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

Diameter

3868 TCP A more advanced AAA protocol that is a replacement for RADIUS

Syslog over TLS

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