NET+ N10-008 COMMON PORTS

7OCT24

TCP/23 (Telnet)

Remote console login to network devices

UDP/67, UDP/68 (DHCP)

Updates BOOTP and assigns IP addresses

UDP/53, TCP/53 (DNS)

Converts domain names to IP addresses

UDP/123 (NTP)

Automatically synchronizes clocks

TCP/3306 (MySQL)

Oracle's open-source SQL services

UDP/161 (SNMP)

Gathers statistics and manages network devices

TCP/22 (SFTP & SSH)

Encrypted file transfers and console login

TCP/20, TCP/21 (FTP)

Sends and receives files between systems

UDP/69 (TFTP)

A very simple file transfer application

TCP/25 (SMTP)

Transfers email between mail servers

TCP/110 (POP3)

Receives mail into a mail client

TCP/143 (IMAP4)

A newer mail client protocol that leaves mail on the server

TCP/80 (HTTP)

Web server communication

TCP/443 (HTTPS)

Web server communication with encryption

TCP/1433 (MS-SQL)

Microsoft's structured query language database

TCP/5060-5061 (SIP)

Voice over IP signaling protocol

TCP/1521 (SQL Net)

Oracle SQL services

TCP/3389 (RDP)

Graphical display of remote device

UDP/514 (Syslog)

A standard for message logging

TCP/445 (SMB)

File and printer sharing for Windows

TCP/389 (LDAP)

Lightweight Directory Access Protocol

TCP/636 (LDAPS)

Secure version of LDAP