50 Common Ports You Should Know

Introduction

In the world of computer networking, ports play a crucial role in facilitating communication between different devices. A port can be defined as a logical channel through which information streams between two devices. Each port has a unique number assigned to it, known as a port number. Understanding port numbers and their comparing administrations is fundamental for anybody who works with computer systems.

In this article, we'll examine 50 of the most common ports that you should know. These ports are assembled into different types based on their characteristics and utilization. We'll investigate their highlights, significance, and centrality in computer organizing.

Discuss About 50 Common Ports You Should Know?

These ports are used to facilitate communication between devices on the network and are essential for network administrators and IT professionals to understand.

Every port in computer networking is associated with a specific protocol or service, and each protocol or service is assigned a standard port number by the Internet Assigned Numbers Authority (IANA). These would be organized into three ranges - well-known ports (0 to 1023), registered ports (1024 to 49151), and dynamic/private ports (49152 to 65535).

The article gives a comprehensive list of the 50 most commonly utilized ports, their related conventions, and the sorts of administrations that ordinarily utilize them. It too incorporates a brief clarification of how to utilize harbor filtering instruments to identify open ports and vulnerabilities.

Well-Known Ports

Well-known ports are those ports whose numbers range from 0 to 1023. They are assigned to specific services and protocols, and their numbers are standardized by the Internet Assigned Numbers Authority (IANA). Some common well-known ports include −

• Port 80: HTTP (HyperText Transfer Protocol)

• Port 21: FTP (File Transfer Protocol)

• Port 25: SMTP (Simple Mail Transfer Protocol)

• Port 22: SSH (Secure Shell)

• Port 443: HTTPS (HyperText Transfer Protocol Secure)

• Port 53: DNS (Domain Name System)

Registered Ports

Registered ports are those ports whose numbers range from 1024 to 49151. They are assigned to user processes or applications by the IANA upon request. Some commonly registered ports include −

• Port 3306: MySQL Database

• Port 5432: PostgreSQL Database

• Port 3389: Remote Desktop Protocol (RDP)

• Port 27017: MongoDB Database

• Port 1521: Oracle Database

Dynamic or Private Ports

These ports whose numbers range from 49152 to 65535. They are used by client applications to initiate communication with servers. Some common dynamic or private ports include −

• Port 49152: Windows RPC (Remote Procedure Call)

• Port 5353: mDNS (Multicast Domain Name System)

• Port 5672: AMQP (Advanced Message Queuing Protocol)

• Port 5355: LLMNR (Link-Local Multicast Name Resolution)

• Port 49153: Windows RPC (Remote Procedure Call)

Impact of ports on Computer Networks

• Port numbers play a vital role in the security of computer networks.

• Misconfigured ports can lead to security breaches and data leaks.

• Understanding port numbers and their corresponding services can help in the identification and prevention of cyber-attacks.

Significance of ports

• Ports are the backbone of computer organizing and empowering communication between different devices and applications.

• Ports encourage the exchange of information between different protocols and administrations.

• The standardization of well-known ports by the IANA guarantees that different devices can communicate with each other consistently.

Some other common ports are

• Telnet (23) - Telnet protocol to ensure effective communication along with the remote server.

• POP3 (110) - Post Office Protocol version 3 for email retrieval.

• IMAP (143) - Internet Message Access Protocol for email retrieval.

• DHCP (67/68) - Dynamic Host Configuration Protocol for IP address allocation.

• NTP (123) - Network Time Protocol for time synchronization.

• SNMP (161/162) - Simple Network Management Protocol to verify the functionality of the network and management of network.

• SMB (445) - Server Message Block protocol for file sharing and printer sharing.

• AFP (548) - Apple Filing Protocol for file sharing between Macs.

• NetBIOS (137-139) - NetBIOS protocol for network communication between Windows devices.

• HTTP Proxy (8080) - HTTP proxy server.

• SOCKS (1080) - SOCKS proxy server.

• MySQL (3306) - MySQL database server.

• MSSQL (1433) - Microsoft SQL Server database server.

• Oracle (1521) - Oracle database server.

• LDAP (389/636) - Lightweight Directory Access Protocol for directory services.

• SMB2 (5722) - SMB version 2 protocol.

• IKE (500) - Internet Key Exchange protocol for VPN connections.

• L2TP (1701) - Layer 2 Tunneling Protocol for VPN connections.

• PPTP (1723) - Point-to-Point Tunneling Protocol for VPN connections.

• SIP (5060/5061) - Session Initiation Protocol for VoIP communication.

• RTP (16384-32767) - Real-time Transport Protocol for audio and video transmission.

• RTCP (16384-32767) - Real-time Control Protocol for audio and video transmission.

• HTTPS Proxy (3128) - HTTPS proxy server.

• Squid (3128) - Squid proxy server.

• VNC (5900) - Virtual Network Computing for remote access.

• NTP (123) - Network Time Protocol for time synchronization.

• IRC (6667/6697) - Internet Relay Chat for real-time communication.

• LDAP (389/636) - Lightweight Directory Access Protocol for directory services.

• AFP (548) - Apple Filing Protocol for file sharing between Macs.

• Bonjour (5353) - Bonjour protocol for network discovery and communication.

• NFS (2049) - Network File System for file sharing.

• Redis (6379) - Redis key-value store.

• Memcached (11211) - Memcached distributed memory caching system.

• Rsync (873) - Remote synchronization for file transfers.

• Zeroconf (5353) - Zero Configuration Networking for automatic network configuration.

• XMPP (5222/5223) - Extensible Messaging and Presence Protocol for instant messaging.

• VMware vSphere Client (443) - VMware vSphere Client for virtualization.

Conclusion

In conclusion, understanding the common ports used in computer networking is essential for IT professionals and network administrators. Being aware of these ports can help them troubleshoot network issues and ensure smooth communication between devices on the network.