Ports & Protocols Flashcards by Paul Neumann

TCP 25

SMTP

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TCP/UDP 7

Echo

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TCP 15

Netstat

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TCP/UDP 19

CHARGEN (character generator protocol)

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TCP 20 (data) & 21 (control)

FTP

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TCP 22

SSH - Secure Shell
SCP (uses SSH)
SFTP (uses SSH)

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TCP 23

Telnet

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TCP/UDP 49

TACACS+

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TCP/UDP 53

DNS

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TCP/UDP 67 & 68

DHCP

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UDP 69

TFTP
(Trivial File Transfer Protocol)

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TCP 80 or 8080

HTTP

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TCP 110

POP3

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TCP/UDP 119

NNTP
(Network News Transfer Protocol)

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TCP/UDP 123

NTP

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TCP 137-139

NetBIOS

TCP 143

IMAP

UDP 161 & 162

SNMP

TCP/UDP 389

LDAP

TCP 443

HTTPS

UDP 1701

L2TP (Layer 2 Tunneling Protocol)
Extension of the Point-to-Point Tunneling Protocol. L2TP is often used with IPSec to establish a Virtual Private Network (VPN).

TCP 1723

PPTP (Point-to-Point Tunneling Protocol)
Used for key exchange and IP protocol 47 (GRE) to encrypt data between peers.

UDP 1812

RADIUS

TCP 3389

RDP (Remote Desktop Protocol)

TCP 3668

DIAMETER