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Well Known TCP/UDP Ports
Well Known TCP/UDP Ports
39
Computer Networking
Undergraduate 1
11/03/2014
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Term

Echo

 Definition

Layer: 3

Port: 7

UDP/TCP
Term

FTP data (active mode)

 Definition

Layer: 7

Port: 20

TCP

  
Term

SSH

 Definition

Layer: 7

Port: 22

TCP

 
Term

Telnet

 Definition

Layer: 7

Port: 23

TCP
Term

SMTP

 Definition

Layer: 7

Port: 25

TCP
Term

DNS (name queries)

 Definition

Layer: 7

Port: 53

UDP
Term

DHCP - Server / Client

 Definition

Layer: 7

Port: 67-68

UDP
Term

TFTP

 Definition

Layer: 7

Port: 69

UDP
Term

HTTP

 Definition

Layer: 7

Port: 80

TCP

 
Term

POP3

 Definition

Layer: 7

Port: 110

TCP

 
Term

NTP

 Definition

Layer: 7

Port: 123

UDP

 
Term

SNMP

 Definition

Layer: 7

Port: 161

UDP

 
Term

LDAP

 Definition

Layer: 7

Port: 389

TCP

 
Term

syslog

 Definition

Layer: 4

Port: 514

UDP

 
Term

Microsoft SQL Server

 Definition

Layer: 5

Port: 1433

TCP

 
Term

RADIUS

 Definition

Layer: 7

Port: 1812 (or) 1645 (Authentication)

Port: 1813 (or) 1646 (Accounting)

UDP

 
Term

HTTPS

 Definition

Layer: 7

Port: 443

TCP

 
Term

IMAP4

 Definition

Layer: 7

Port: 143

TCP

 
Term

IKE (Phase 1) (Security Association)

 Definition

Layer: 3

Port: 500

 
Term

IKE (Phase 2)

 Definition

Layer: 3

Port: 4500

 
Term

SIP

 Definition

Port: 5060 & 5065

UDP & TCP
Term

SCP

 Definition

Port: 22 (Uses SSH)

Layer: 7

TCP

 
Term

SFTP

 Definition

Layer: 7

Port: 22 (Uses SSH)

TCP

 
Term

TACACS+

 Definition

Layer: 5

Port: 49

TCP 

 
Term

DNS zone transfers

 Definition

Layer: 7

Port: 53

TCP

 
Term

Kerberos

 Definition

Layer: 6

Port: 88

UDP

 
Term

SNMP trap

 Definition

Layer: 7

Port: 162

UDP

 
Term

SMTP SSL/TLS

 Definition

Layer: 7

Port: 465

TCP

 
Term

LDAP/SSL

 Definition

Layer: 7

Port: 636

TCP

 
Term

LDAP/TLS

 Definition

Layer: 7

Port: 636

TCP

 
Term

IMAP SSL/TLS

 Definition

Layer: 7

Port: 993

TCP

 
Term

POP SSL/TLS

 Definition

Layer: 7

Port: 995

TCP

 
Term

L2TP

 Definition

Layer: 2

Port: 1701

UDP

 
Term

PPTP

 Definition

Layer: 2

Port: 1723

TCP

 
Term

RDP

 Definition

Layer: 7

Port: 3389

TCP/UDP

 
Term

IPsec AH (Authentication Header)

 Definition

Layer: 3

Protocol ID: 51

 
Term

IPsec ESP (Encapsulating Security Payload)

 Definition

Layer: 3

Protocol ID: 50

 
Term

FTP control

 Definition

Layer: 7

Port: 21

TCP

 
Term

NetBIOS (TCP rarely used)

 Definition

Layer: 5

Port 137-139

TCP/UDP

 
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