Port names and functions

Port 69 is used for

(TFTP) Trivial File Transfer Protocol as a lightweight file transfer method for sending configuration files or network booting of an operating system using a UDP connection

Port 53 is used for

(DNS) Domain Name System to translate domain names into IP addresses uses both TCP and UDP

Port 25 used for

(SMTP) Simple Mail Transfer Protocol provides the ability to send emails over the network using TCP

Port 23 used for

Telnet(older version of SSH) Provides insecure remote control of another machine using a text-based environment(to better secure it, close telnet, and open an SSH port)

Port 22 is used for

(SSH) secure remote terminal access and file transfer capabilities, provides (SCP) secure copy functions, and provides (SFTP)secure file transfers Using TCP

Port 21 is used for

FTP(File Transfer Protocol) transfers files from host to host operates over port 21 using TCP

Port 443 is used for

(HTTPS) which provides secure web communication using TCP

Port 80 is used for

HTTP used for insecure web browsing using TCP

Port 389 is used for

(LDAP) facilitates directory services using TCP

Port 162 is used for

(SNMP Trap) which is responsible for sending SNMP trap messages using UDP

Port 161 is used for

(SNMP)which is used to manage network devices using UDP

Port 143 is used for

(IMAP)which allows for accessing email messages on a server using TCP

Ports 137, 138, 139 are used for

NetBios which is a network protocol suite using TCP and UDP

Port 135 is used for

(RPC) Remote Procedure Call Facilitates communication between different system processes using TCP and UDP

Port 119 is used for

(NNTP) Network News Transfer Protocol) used for accessing newsgroups

Port 110 is used for

POP3 Post Office Protocol Version Three and is responsible for retrieving email from a server using TCP

Port 88 is used for

Kerberos which is a Network Authentication Protocol using UDP

Port 3389 is used by

RDP and enables remote desktop access using TCP

Ports 1812 and 1813 are used for

RADIUS UDP which is used for authentication and accounting as defined by the Internet Engineering Task Force using UDP

Ports 1645 and 1646 are used for

RADIUS TCP which is used for remote authentication, authorization, and accounting using TCP

Port 1433 is used for

Microsoft SQL which is used to facilitate communication with Microsoft SQL server using TCP

Port 995 is used for

POP3S and is used for secure email retrieval

Port 993 is used for

(IMAPS) which is used for secure email retrieval using TCP

Port 636 is used for

(LDAPS) which is used for LDAP communication over SSL/TLS using TCP

Port 514 is used for

Syslog which is used for sending log messages using UDP

Ports 465 and 587 are used for

(SMTPS) which provides secure SMTP communication using TCP

Port 445 is used for

(SMB) which is used for file and printer sharing over a network using TCP

Port 6514 is used for a

Syslog TLS which is Used in a secure syslog that uses SSL/TLS to encrypt the IP packets using a certificate before sending them across the IP network to the syslog collector