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  • Front
  • Back

Total # of TCP & UDP ports

65536 TCP (0-65535)


65536 UDP (0-65535)


= 131072 total ports

20, 21

FTP - FILE TRANSFER PROTOCOL;


Transport Protocol TCP


(Transmits in clear-text)

22

SSH - SECURE SHELL; Transport Protocol TCP & UDP

23

TELNET; Transport Protocol TCP


(Transmits in clear-text)

25

SMTP - SIMPLE MAIL TRANSFER PROTOCOL; Transport protocol TCP

53

DNS; TRANSPORT PROTOCOL TCP & UDP

69

TFTP - TRIVIAL FILE TRANSFER PROTOCOL; Transport Protocol UDP

67, 68

DHCP - DYNAMIC HOST CONFIGURATION PROTOCOL;


Transport Protocol UDP

80

HTTP - HYPERTEXT TRANSFER PROTOCOL; Transport Protocol TCP

67, 68

DHCP - DYNAMIC HOST CONFIGURATION PROTOCOL; Transport protocol UDP

69

TFTP - TRIVIAL FILE TRANSFER PROTOCOL; Transport protocol UDP

110

POP3 - POST OFFICE PROTOCOL TCP

119

NNTP - NETWORK NEWS TRANSFER PROTOCOL; Transport protocol TCP

80

HTTP - HYPERTEXT TRANSFER PROTOCOL; Transport protocol TCP

50, 51

IPSec

53

DNS - DOMAIN NAME SYSTEM; Transport protocol TCP & UDP

123

NTP - NETWORK TIME PROTOCOL; Transport protocol UDP

143

IMAP4 - INTERNET MESSAGE ACCESS PROTOCOL; Transport protocol TCP & UDP



IMAPS - Secure IMAP uses port 993


IMAP4 with STARTTLS uses 143

161, 162

SNMP - SIMPLE NETWORK MANAGEMENT PROTOCOL; Transport protocol TCP & UDP

389

LDAP - LIGHTWEIGHT DIRECTORY ACCESS PROTOCOL; Transport protocol TCP & UDP

443

HTTPS - HTTP WITH SSL (SECURE SOCKET LAYER); Transport protocol TCP & UDP

3389

REMOTE DESKTOP PROTOCOL; Transport protocol TCP & UDP

514 and 6514

Used by syslog application on routers, switches, and firewalls using UDP for auditing and connections.



By default uses 514 and, for secure TLS connections, uses 6514

135-139

NetBIOS; Transport protocol TCP & UDP

514

Syslog



Uses UDP and is used with routers, switches, and firewalls for monitoring.

49

TACACS+


Terminal Access Controller Access Control System Plus



TCP port 49



More reliable than RADIUS.

1812 / 1813

RADIUS



Remote Authentication Dial In User Service

995

POP3S


(Secured) Post Office Protocol over SSL/TLS

6514

Syslog with TLS



Uses UDP