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MarG's avatar
MarG
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Jun 17, 2020

LTM Healt monitor decrypt ECDHE

Is any method to decrypt LTM HealtMonitor from tcpdump that is using TLS1.2 and Cipher Suite: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ?

iRule is not an option, because HealtMonitor is not traversing virtual server and act as a client to node Server.

ssldump does not support ECDHE session keys.

Server side tcpdump is not an option.

Certificate and private key from server side are available.

2 Replies

  • the only way would be for the client (F5) or server (server) to output the session key.

     

    for a health monitor im not aware of any way to make that happen, perhaps the server wants to?

     

    my question is why? you can easily replicate the behaviour with a curl or openssl s_client from the big-ip, why does the health monitor traffic have to decrypted?

     

     

    • MarG's avatar
      MarG
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      Thank you for reply. Thats the case.

       

      cURL in F5 bash is working and converted to http healt monitor is not responding but that's another case