PAP protocol , NPS, Azure MFA and Global Protect VPN

SingaUser-9433 21 Reputation points
2021-01-26T01:31:34.157+00:00

Hi MS,

We are using Palo Alto Global Protect VPN that supports PAP and PEAP-MACHAPv2.

We have successfully setup RADIUS, NPS extension with Azure MFA, and using the PAP protocol the MFA login is working fine.
CHAP is not working.

But we know that PAP is less secured and weaker protocol.
Please let us if it is safe and secure to use PAP with NPS extension and MFA with Global protect VPN?
Also let us know how and where is the PAP protocol is used in the entire process of authentication of the above?

Thank you.

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Accepted answer
  1. Sunny Qi 10,896 Reputation points Microsoft Vendor
    2021-01-27T05:13:27.777+00:00

    Hi,

    Thanks for posting in Q&A platform.

    Please understand that we are not familiar with Azure MFA and Global Protect VPN.

    For PAP protocol, it is the least safe authentication methods. PAP works basically the same way as the normal login procedure. The client authenticates itself by sending a user name and an (optionally encrypted) password to the server, which the server compares to its secrets database. This technique is vulnerable to eavesdroppers who may try to obtain the password by listening in on the serial line, and to repeated trial and error attacks.

    Best Regards,
    Sunny

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