Common Network Ports and Their Applications

Essential for DevOps or Cloud engineer:-

Port numbers are essential for managing applications, troubleshooting network issues, and ensuring secure communication. Here's a detailed breakdown of some commonly used port numbers and their applications:

• Port 21 – FTP (File Transfer Protocol)
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• Port 22 – SSH (Secure Shell)
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• Port 23 – Telnet
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• Port 25 – SMTP (Simple Mail Transfer Protocol) Mail Port
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• Port 53 – DNS (Domain Name System) Port
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• Port 67 – DHCP (Dynamic Host Configuration Protocol) Server
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• Port 79 – Finger Command for SMTP Mail Server ETRN Finger Port
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• Port 80 – HTTP (Hypertext Transfer Protocol) Port
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• Port 110 – POP3 (Post Office Protocol v3) Port
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• Port 115 – SFTP (Secure File Transfer Protocol) Port
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• Port 123 – NTP (Network Time Protocol) Port
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• Port 143 – IMAP4 (Internet Message Access Protocol v4) Port
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• Port 177 – Xmanager Port (TCP)
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• Port 389 – LDAP (Lightweight Directory Access Protocol) Port
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• Port 443 – HTTPS (Hypertext Transfer Protocol Secure) Port (SSL)
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• Port 445 – Microsoft Active Directory and SMB (Server Message Block) Port
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• Port 465 – Google Mail Outgoing Mail Server
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• Port 636 – LDAP over SSL (Secure LDAP)
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• Port 993 – Secure IMAP (Internet Message Access Protocol) Port
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• Port 1433 – SQL Server Port
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• Port 1434 – SQL Server Monitoring Port
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• Port 1521 – Oracle Database Port
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• Port 2000 – Cisco IP Phone Port
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• Port 3306 – Default MySQL Port
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• Port 3389 – Remote Desktop and Terminal Server Port
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• Port 5900 – RealVNC Default Remote Control Port
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• Port 6000 – TCP Port for Xmanager
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• Port 8080 – HTTP Internet Traffic Port