Port 1812 is used for which service?

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Prepare for the Certified Ethical Hacker Version 11 Exam with a comprehensive test featuring flashcards and multiple choice questions, each accompanied by hints and explanations to ensure a thorough understanding. Ace your ethical hacking exam with confidence!

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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