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Petrus's avatar
Petrus
Icon for Nimbostratus rankNimbostratus
Jul 11, 2019

F5 and SMB v1

We are looking to disable SMB v1 but I see the F5 is still talking on it. Is there a place you can disable v1 or will the F5 automatically switch to v2.

BIG-IP
security

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  • Niels_van_Sluis's avatar
    Niels_van_Sluis
    Icon for MVP rankMVP
    Jul 14, 2019

    Are you referring to NTLM authentication and SMBv1? From 15.0.0 SMBv1 is no longer used when using NTLM auth. All older versions are using SMBv1. SMBv2 isn't supported. See the release notes from 15.0.0 on SMBv1 below.

     

    NTLM Authentication enhancement

     

    Microsoft has deprecated SMBv1 due to security impacts. F5's NTLM authentication no longer uses SMBv1. We now implement MSRPC over TCP.

     

  • Petrus's avatar
    Petrus
    Icon for Nimbostratus rankNimbostratus
    Jul 15, 2019

    Hi Niels,

    Yes this is what I was referring to. Thank you for the clarification.

     

    Petrus