CySA+ Ports
21 TCP - ANS-FTP - File Transfer Protocol is used to transfer files from host to host
22 TCP/UDP - ANS-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 - ANS-Telnet - Unencrypted method to remotely administer network
devices (should not be used)
25 TCP - ANS-SMTP - Simple Mail Transfer Protocol is used to send email over the
internet
53 TCP/UDP - ANS-DNS - Domain Name Service is used to resolve hostnames to IPs
and IPs to hostnames
69 UDP - ANS-TFTP - 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
80 TCP - ANS-HTTP - Hyper Text Transfer Protocol is used to transmit web page data
to a client for unsecured web browsing
88 TCP/UDP - ANS-Kerberos - used for network authentication using a system of
tickets within a Windows domain
110 TCP - ANS-POP3 - Post Office Protocol v3 is used to receive email from a mail
server
119 TCP - ANS-NNTP - Network News Transfer Protocol is used to transport Usenet
articles
135 TCP/UDP - ANS-RPC/DCOM-scm - Remote Procedure Call is used to locate
DCOM ports to request a service from a program on another computer on the network
143 TCP - ANS-IMAP - Internet Message Access Protocol is used to receive email from
a mail server with more features than POP3
161 UDP - ANS-SNMP - Simple Network Management Protocol is used to remotely
monitor network devices
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