Ports to remember Flashcards
6667
IRC Default port
Internet relay chat
21 TCP
FTP - File Transfer Protocol is used to transfer files from hosts to host
22 TCP / UDP
SSH, SCP, SFTP
Secure Shell is used to remotely administer network devices and systems. SCP is used for secure copy and SFTP for secure FTP.
23 TCP / UDP
Telnet - Unencrypted method to remotely administer network devices (should not be used)
25 TCP
SMTP - Simple Mail Transfer Protocol is used to send mail over the internet
53 TCP / UDP
DNS
Domain Name Service is used to resolve hostnames to Ips and Ips to hostnames
69 UDP
TFTP - Trivial FTP is used as simplified version of FTP to put a file on a remote host or get a file from a remote host
• Not secure but lightweight
• Often used to boot an operating system of a server an into a thin client
80 tcp
Http - Hyper Transfer Protocol is used to transmit web page data to a client for unsecured web browsing
88 TCP UDP
Kerberos - Used for Networks authentication using a system of tickers within a windows domain
110 - TCP
POP3 - Post office protocol v3 is used to receive email from a mail server
119 TCP
NNTP - Network news Transfer Protocol is used to transport Usenet articles
135 TCP / UDP
RDP / DCOM-scm - Remote Procedure Call is used to locate DCOM ports to request a service from a program on a computer on the network
137-139 - TCP UDP
NetBIOS - NetBios is used to conduct name querying, sending of data, and other functions over a NetBios connection
143 TCP
IMAP - Internet Message Access Protocol is used to receive email from a mail server with more features than pop3
161 UDP
SNMP - Simple Network Management Protocol is used to remotely monitor network devices