Remote Authentication Dial-In User Service (RADIUS): 1812, 1813
Security Weaknesses:
Vulnerable to shared secret theft or weak secret configurations.
Susceptible to replay attacks and credential interception.
Limited protection against MITM without additional encryption layers.
Security Defense and Mitigation Measures:
Use strong shared secrets and enforce IP-based restrictions.
Implement RADIUS over TLS (RadSec) for enhanced encryption.
Regularly audit RADIUS configurations and server logs.
Indicators of Compromise or Attack:
Repeated authentication failures from specific endpoints.
Unexpected access logs or unauthorized authentications.
Anomalous traffic patterns to/from RADIUS servers.
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