Network, Port cybersecurity help

Ports are fundamental to networking as they enable communication between different devices and services over a network. Here is a comprehensive list of common ports categorized by their typical usage and protocol:

Well-Known Ports (0-1023):

• Port 20: FTP (File Transfer Protocol) – Data
• Port 21: FTP (File Transfer Protocol) – Control
• Port 22: SSH (Secure Shell)
• Port 23: Telnet (unencrypted text communication)
• Port 25: SMTP (Simple Mail Transfer Protocol)
• Port 53: DNS (Domain Name System)
• Port 80: HTTP (Hypertext Transfer Protocol)
• Port 110: POP3 (Post Office Protocol version 3)
• Port 143: IMAP (Internet Message Access Protocol)
• Port 161: SNMP (Simple Network Management Protocol)
• Port 443: HTTPS (HTTP Secure)
• Port 445: Microsoft-DS (Microsoft Directory Services)
• Port 465: SMTPS (SMTP over SSL/TLS)
• Port 993: IMAPS (IMAP over SSL/TLS)
• Port 995: POP3S (POP3 over SSL/TLS)
• Port 3389: RDP (Remote Desktop Protocol)

Registered Ports (1024-49151):

• Port 1080: SOCKS proxy
• Port 1433: Microsoft SQL Server
• Port 1521: Oracle Database
• Port 1723: PPTP (Point-to-Point Tunneling Protocol) VPN
• Port 3306: MySQL Database
• Port 3389: RDP (Remote Desktop Protocol)
• Port 5432: PostgreSQL Database
• Port 5900: VNC (Virtual Network Computing)
• Port 8080: HTTP alternate (often used for web proxies)

Dynamic (Private) Ports (49152-65535):

• Port 49152-65535: Used by client applications for outgoing connections (ephemeral ports)

Other Commonly Used Ports:

• Port 67/68: DHCP (Dynamic Host Configuration Protocol)
• Port 69: TFTP (Trivial File Transfer Protocol)
• Port 123: NTP (Network Time Protocol)
• Port 137-139: NetBIOS over TCP/IP
• Port 161-162: SNMP (Simple Network Management Protocol) traps
• Port 389: LDAP (Lightweight Directory Access Protocol)
• Port 443: OpenVPN (SSL/TLS VPN)
• Port 5060-5061: SIP (Session Initiation Protocol) for VoIP
• Port 514: Syslog (event logging)
• Port 873: rsync (remote file synchronization)

This list includes a variety of ports commonly used for different networking protocols and services. Each port number is associated with specific applications or protocols, and understanding these ports is important for network administrators, security professionals, and anyone working with computer networks. Keep in mind that this list is not exhaustive, and there are many more ports and protocols used in networking depending on specific applications and configurations.