Port 1812 is used for which service?

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Prepare for the Certified Ethical Hacker Version 11 Exam. Study with comprehensive questions and explanations. Equip yourself with the skills needed for success!

Multiple Choice

Port 1812 is used for which service?

Explanation:
Port 1812 is the standard UDP port used by RADIUS for authentication. RADIUS (Remote Authentication Dial-In User Service) centralizes the authentication process for network access, such as VPNs and Wi‑Fi. In a typical flow, a network access device sends an Access-Request to the RADIUS server on port 1812; the server then replies with Access-Accept or Access-Reject based on the user’s credentials. Accounting, which logs session data, uses a separate port (commonly 1813). This port is not used by SNMP (161/162) or DNS (53). So, the service associated with port 1812 is RADIUS authentication.

Port 1812 is the standard UDP port used by RADIUS for authentication. RADIUS (Remote Authentication Dial-In User Service) centralizes the authentication process for network access, such as VPNs and Wi‑Fi. In a typical flow, a network access device sends an Access-Request to the RADIUS server on port 1812; the server then replies with Access-Accept or Access-Reject based on the user’s credentials. Accounting, which logs session data, uses a separate port (commonly 1813). This port is not used by SNMP (161/162) or DNS (53). So, the service associated with port 1812 is RADIUS authentication.

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