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jknock6560
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Jun 05, 2025

F5 Internal IPs Nessus Scans

I am confused.  I scan my Virtual BIG-IP F5s via a NESSUS scanner.  It appears the scanners scans the "MGMT" ip for both VEs.  I assume the MGMT IPs are the ones on top left when you open the GUI?  If that's the case what is the ACTIVE_F5_HA_Self_IP address? Is that considered the "internal" ip of the F5s?  I want to set the scanner to scan the internal IP of both Virtual F5s.  However when I try to scan the internal IP the scan cannot reach it and it fails.  Any assistance would be appreciated. 

9 Replies

  • When you scan your IPs from the virtual Servers, there is only the virtual server answering. But if you scan the network/vlan and nessus is scanning the F5-Self-IP and your "port-lockdown"-Setting is not setup to "allow none" than mgmt appears on that IP. That needs to be changed. 

     

    • jknock6560's avatar
      jknock6560
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      Ok so from my understanding - I need to change the port-lockdown setting in the GUI of the F5? Once I select allow none then when i run the scan it will scan on the internal interface instead of the mgmt ip? 

  • Hello,

    you can see self and floatring IPs under Network Self IPs.
    But as said if allow none is selcted in port-lockdown F5 will drop the request.

    This is the default behaviour and you shouldn't allow anything in self ips unless specifically needed.

    • jknock6560's avatar
      jknock6560
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      So if allowed in settings then the scan should be allowed and will scan correct? Should the setting be changed after each scan for security reasons?