Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

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Sarah_258804's avatar
Sarah_258804
Icon for Cirrus rankCirrus
May 25, 2016

Which IP does my F5 use to authenticate against Active Directory?

Hi, I'm currently trying to set up authentication on my F5 to use "Remote - Active Directory". When I log in to the F5 with my active directory account, which IP address is it going to use to talk to the domain controllers? Its management IP or a Self-IP?

 

Thanks

 

1 Reply

  • JoshBecigneul's avatar
    JoshBecigneul
    Icon for MVP rankMVP
    May 25, 2016

    The basic answer is "it depends". What I mean by this is that the F5 will use whatever IP is appropriate, based upon its routing table. If you have a default route that uses a self-IP to contact the gateway, it should use that. If you don't have a default route which would use your self-IP, then it should use the default route assigned to the management interface.

    You could check to see what the system thinks by running the following in the bash shell:

    ip route get

    From there it will tell you which gateway the connection would use.

    Some more documentation on how the BIG-IP handles management routing (if you prefer the AD traffic use the management interface) is here: https://support.f5.com/kb/en-us/solutions/public/13000/200/sol13284.html