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

Forum Discussion

Torti's avatar
Torti
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Jan 24, 2019

FQDN ephemeral node logging

Hi,   is there any log or a way to log, when an ephemeral node is changed? Especially when the entry is deleted because of a missing DNS entry. Or the creation a new one.   Thx  
application delivery
LTM
AceDawg_204810's avatar
AceDawg_204810
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Jan 27, 2019

Hi Torti,

Do you know the TTL for the node FQDN? Running 

tmsh list /ltm node * all-properties
should provide this information.

You're not going to know if a change has been made (e.g. node address is changed or deleted) unless you track the TTL of the node somehow.

You could write an iRule to capture this information but that would be event driven. I assume you want this information independent of the node being configured as a pool member, correct?

  • Torti's avatar
    Torti
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    Feb 09, 2019

    your command shows the ttl configuration, only.

     

    you do not see the actually lifetime of the object.

     

    The creation of a ephermeral node is visible in the gui. If you select the object, you can see the DNS availability with a timestamp. But if a ephermeral object is removed, you don't get any information about that. You only get an log message, if the FQDN object doesn't have a ephermeral node anymore.

     

    In my opinion, this is a bad design.