Network Ports Flashcards
21
TCP
FTP: File Transfer Protocol
22
TCP, UDP SSH, SCP, SFTP SSH is Secure Shell, used for remote admin SCP is secure copy SFTP is secure file transfer
23
TCP, UDP
Telnet
Unencrypted protocol for remote admin
DO NOT USE. Block this port!
25
TCP
SMTP
Simple Mail Transfer Protocol
common email service
53
TCP, UDP
DNS
Domain Name Service
Resolves hostnames to IPs and IPs to hostnames
69
UDP
TFTP
Trivial FTP. Simplified version of FTP. Not secure.
80
TCP
HTTP
web browsing, not secure
88
TCP, UDP
Kerberos
Network authentication using tickets in Windows domain
110
TCP
POP3
Post Office Protocol v3. Another common email service
119
TCP
NNTP
Network News Transfer Protocol
transports Usenet articles
135
TCP, UDP
RPC/DCOMscm
Remote Procedure Call locates DCOM ports to request a service from a program on another computer on the network
137
137, 138, 139 TCP, UDP
NetBIOS
Used to conduct name querying, sending of data, and other functions
143
TCP
IMAP
Internet Message Access Protocol
another email service, with more features than POP3
161
UDP
SNMP
Simple Network Management Protocol
remotely monitors network devices
162
TCP, UDP
SNMPTRAP
sends Trap and InformRequests to the SNMP Manager on a network