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RADIUS authentication fails even if "Access-Accept" packet is received from server Technical Level
Symptoms
  • RADIUS authentication fails even if "Access-Accept" packet is received from the RADIUS server.

  • The /var/log/secure file contains errors

    DATE TIME lab1 sshd[8781]: pam_radius_auth: Got response from RADIUS server
    DATE TIME lab1 sshd[8781]: Failed password for testuser from 10.1.1.5 port 54644 ssh2


  • Non-Working Packet example

    Radius Protocol
    Code: Access-Accept (2)
    Attribute Value Pairs
    AVP: l=8 t=User-Name(1): testuser
    AVP: l=8 t=Class(25): 1111111f7073
    AVP: l=38 t=Class(25): 111111111a696e662d6e733030372d6377792f3232313439...

    Working Packet example

    Radius Protocol
    Code: Access-Accept (2)
    Attribute Value Pairs
    AVP: l=9 t=Class(25): 1111111126368

Solution
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