Networking Ports | A Quick Glance of 3 Different Networking Ports

Networking Ports

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Introduction to Networking Ports

The physical ports on a computer provide communication with peripheral devices like a mouse, keyboard as well as internet devices via ethernet cables. Whereas, in computer networking, a port is an endpoint to a logical connection. The port number shows a category of the port. Ports are assigned as positive 16-bit unsigned integers, which range from 0 to 65535. For E.g. Port 80 is used in HTTP traffic for example. Suppose, netstat -n command is fired on Linux or Windows; it will return a list of the local addresses and ports, and the foreign addresses and port system is connected to.

Port Number Categories

Port numbers are divided into three categories.

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Well-known/System ports: Range 0–1,023
Registered ports: Range 1,024–49,151
Dynamic/Private ports: Range 49,152–65,535

1.Well-known/System Ports

Well-known ports also called as system ports, ranges from 0 to 1023 since many of the core services on Unix servers used these ports; also, it requires privilege permissions on the server for implementation.

Here is detailed information about some of the widely used ports.

Port Number
Service
Usage

7
Echo
The echo server returns data is received on an originating source.

20
File Transfer Protocol (FTP)
Data Transfer.

21
File Transfer Protocol (FTP)
Command Control.

22
Secure Shell (SSH)
It manages network devices at the command level securely.

23
Telnet
Remote login service, unencrypted text messages.

25
Simple Mail Transfer Protocol (SMTP)
E-mail Routing. It is used to transfer email from source to destination between mail servers.

53
Domain Name System (DNS)
It converts domain names into IP addresses for network routing.

67-68
DHCP/BOOTP
It provides a connectionless service model with the help of User Datagram Protocol (UDP).

69
Trivial File Transfer Protocol (TFTP)
It transfers files without the session establishment.

70
Gopher
It provides gateways to other information systems such as the World-Wide Web, WHOIS WAIS, Archie, etc. It allows search and retrieve information from different locations easily.

80
Hypertext Transfer Protocol (HTTP)
It is a protocol for distributed, hypermedia, collaborative information systems.

110
Post Office Protocol (POP3)
Used by e-mail clients to retrieve e-mail from a server.

119
Network News Transfer Protocol (NNTP)
It helps to connect to Usenet servers and transfer newsgroup articles between systems.

123
Network Time Protocol (NTP)
It is used to synchronize the devices on the Internet.

137-139
NetBIOS
It is not a protocol, but it is used in combination with IP with an over TCP/IP (NBT) protocol. It helps to interconnect Microsoft Windows machines.

143
Internet Message Access Protocol 4 (IMAP4)
To Manage Digital Mail.

161-162
Simple Network Management Protocol (SNMP)
It is used by network administrators for network management.

179
BGP
It is used by ISP (Internet Service Provider) to maintain traffic processing and huge routing tables.

194
Internet Relay Chat (IRC)
It provides communication in the form of text in an easier way which is based on a client/server networking model.

389
LDAP
LDAP provides access and maintenance for distributed directory information. It is based on the ITU-T X.500 standard, but it has been altered and simplified to work over TCP/IP networks.

443
HTTP Secure (HTTPS)
It provides the same functions as HTTP, but it uses a secure connection with the help of SSL or TLS.

636
Lightweight Directory Access Protocol over TLS/SSL (LDAPS)
LDAPS provides the same functions as LDAP, but it uses a secure connection with the help of SSL or TLS.

520
RIP
It uses hop count to find the best path between the source and the destination network.

2. Registered Ports

These ports range from 1024 to 49151 are not controlled or assigned. However, they can be registered to prevent redundancy.

3. Dynamic Ports

These ports range from 49152 to 65535, also known as private or non-reserved ports. These ports are not registered, assigned, or controlled. Dynamic ports are used for private or temporary ports.

Here is a list of some Registered and Dynamic ports.

Port number
Service

1025
Microsoft RPC

1026-1029
Windows Messenger

1080
SOCKS Proxy

1080
MyDoom

1194
OpenVP

1214
Kazaa

1241
Nessus

131
1 Dell OpenManage

1337
WASTE

1433-1434
Microsoft SQL

1512
WINS

1589
Cisco VQP

1701
L2TP

1723
MS PPTP

1725
Steam

1741
Cisco Works 2000

1755
MS Media Server

1812-1813
RADIUS

1863
MSN

1985
Cisco HSRP

2000
Cisco SCCP

2002
Cisco ACS

2049
NFS

2082-2083
cPanel

2100
Oracle XDB

2222
DirectAdmin

2302
Halo

2483-2484
Oracle DB

2745
Bagle.H

2967
Symantec AV

3050
Interbase DB

3074
XBOX Live

3124
HTTP Proxy

3127
MyDoom

3128
HTTP Proxy

3222
GLBP

3260
iSCSI Target

3306
MySQL

3389
Terminal Server

3689
iTunes

3690
Subversion

3724
World of Warcraft

3784-3785
Ventrilo

4333
mSQL

4444
Blaster

4664
Google Desktop

4672
eMule

4899
Radmin

5000
UPnP

5001
iperf

5004-5005
RTP

5050
Yahoo! Messenger

5060
SIP

5190
AIM/ICQ

5222-5223
XMPP/Jabber

5432
PostgreSQL

12345
NetBus

13720-13721
NetBackup

14567
Battlefield

15118
Dipnet/Oddbob

19226
AdminSecure

19638
Ensim

20000
Usermin

24800
Synergy

25999
Xfire

27015
Half-Life

27374
Sub7

28960
Call of Duty

31337
Back Orifice

33434+
traceroute

Conclusion – Networking Ports

Although it might seem obvious from this list that there are a large number of ports missing, the intention here was to cover only the most widely seen and used protocols. Hopefully, this article will enable you to pick the right port number for such services to implement.