FTP port
TCP - 20 (Data)
TCP - 21 (Control
Telnet port
TCP - 23
SSH port
TCP - 22
SMPT port
TCP - 25
DNS port
TCP - 53 (zone transfers)
UDP - 52 (queries)
DHCP/BOOTP port
UDP - 67,68
HTTP port
TCP - 80
POP3 port
TCP - 110
IMAP4 port
TCP - 143
SNMP port
UDP - 161, 162
HTTPS port
(HTTP over SSL)
TCP - 443
RDP port
TCP - 3389
LDAP port
TCP - 389
SMB/CIFS port
TCP - 3020
CIFS
Common Internet File System
provides shared access to files, printers, etc
FTP
File Transfer Protocol
SMTP
Simple Mail Transfer Protocol
DNS
Domain Name Service
HTTP
Hypertext Transfer Protocol
POP3
Post Office Protocol version 3
IMAP
Internet Message Access Protocol
HTTPS
Hypertext Transfer Protocol Secure
RDP
Remote Desktop Protocol
DHCP
Dynamic Host Configuration Protocol
Automatic assignment of IP addresses
LDAP
Lightweight Directory Access Protocol
SNMP
Simple Network Management Protocol
for managing devices across a network
SMB
Server Message Block
file and printer sharing for Windows
SSH
Secure Shell
a terminal session that is encrypted
SFTP
Secure FTP over SSH
file transfer that is encrypted
FTP
File Transfer Protocol
file transfer - UNencrypted