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

Forum Discussion

Sajin's avatar
Sajin
Icon for Nimbostratus rankNimbostratus
Oct 09, 2020

HTTP response from pool member to client IP is getting blocked by F5 LTM with the status code 0

I have a BiGIP LTM with the version 13.1.3.4 with the engineering hotfix where we disabled HTTP compliance check using the command - 'tmsh modify sys db tmm.http.rfc.enforcement value disable'. Howe...
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Simon_Blakely's avatar
Simon_Blakely
Icon for Employee rankEmployee
Oct 11, 2020

You really need (decrypted) packet captures to see the server response at a packet level to determine what compliance issues may be occurring, and where.

 

 

  • Sajin's avatar
    Sajin
    Icon for Nimbostratus rankNimbostratus
    Oct 12, 2020

    Hi Simon, Thank you, I was specifically looking if any update happened on HTTP profile on 13.1.3.4 compared to our old version - 12.1.3.3 in F5 release notes as the server is dropping connection even after disabling 'http rfc enforcement value' globally.

     

    I will find a downtime to enable the http profile and packet captures. Can you please help me with the commands that I need to run here?