Ports Flashcards
20
File Transfer Protocol (FTP) Data Transfer / connection
21
File Transfer Protocol (FTP) Command Control / session control
22
Secure Shell (SSH) / Secure Copy (SCP)
23
Telnet - Remote login service, unencrypted text messages
25
Simple Mail Transfer Protocol (SMTP) E-mail Routing - sending
49
TACACS+ Terminal Access Controller Access Control System
50 / 51
IPsec Encapsulating Security Payload (ESP)
/
IPsec Authentication Header (AH)
53
Domain Name System (DNS) service - UDP queries and replies | TCP zone transfers
67 / 68
Dynamic Host Configuration Protocol (DHCP) - a network protocol that automatically assigns IP addresses and other communication parameters to devices on a network
69
UDP: Trivial File Transfer Protocol (TFTP)
TFTP is not secure because it uses UDP for transport. It doesn’t have provisions for user authentication, and it’s not possible to list, delete, or rename files or directories.
80 / 8080
Hypertext Transfer Protocol (HTTP) used in World Wide Web
88
Kerberos
110
Post Office Protocol (POP3) used by e-mail clients to retrieve e-mail from a server
111
Portmapper (Linux)
119
Network News Transfer Protocol (NNTP)
123
Network Time Protocol (NTP) - UDP synchronizing device clocks
137 / 138 / 139
TCP & UDP NetBIOS
143
Internet Message Access Protocol (IMAP) Management of Digital Mail - receive
161 / 162
Simple Network Management Protocol (SNMP)
/
UDP: SNMP notifications. traps (error messages and notifications)
194
Internet Relay Chat (IRC)
389 / 636
Lightweight Directory Access Protocol (LDAP) - LDAPS -> 636
443
HTTP Secure (HTTPS) HTTP over TLS/SSL / VPN
445
Server Message Block (SMB) - TCP
465 / 587
SMTPS w/ SSL - TLS -> 587
