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MadMick's avatar
MadMick
Icon for Nimbostratus rankNimbostratus
Apr 26, 2022

Proxy Handhsake failure

Hi all, sorry, I'm not an expert using F5 but I got a question for you. I'm using an iRule Proxy configured on a BIG-IP 13.1.1. Suddenly...and I don't know why, this proxy is still working but a...
event
security
MadMick's avatar
MadMick
Icon for Nimbostratus rankNimbostratus
Apr 27, 2022

This is the Virtual server configuration: everything seems to be disabled.

 

PSFletchTheTek's avatar
PSFletchTheTek
Icon for Cumulonimbus rankCumulonimbus
Apr 27, 2022

Hi,

Your in Local Traffic > Virtual Servers > [VIRTUAL SERVER] > Secuirty.
SSL Certs are set at
Local Traffic > Virtual Servers > [VIRTUAL SERVER]
Under Configuration
SSL Profile (Client) and SSL Profile (Server)

And these policies are set in Local Traffic > Profiles > SSL > Client or Server as needed.
Client is incoming so from web client to f5 and server is f5 to web server,
From the looks of your in i'm guessing this is linked to the f5 to server comms so the SSL Server profile is being used.

 

So possibly something in the server ssl profile is stopping you?
You are in the range of looking at what updates have happened on the TrendMicro platform, and a f5 support call to try to deep dive into it.

  • MadMick's avatar
    MadMick
    Icon for Nimbostratus rankNimbostratus
    Apr 27, 2022

    Thank you mate for your time.

    This is my configuration...and it seems correct: what do you think?

    I already check this and I can't see any blocking parameter.

     

     

     

     

     

    • PSFletchTheTek's avatar
      PSFletchTheTek
      Icon for Cumulonimbus rankCumulonimbus
      Apr 27, 2022

      Hum interesting!!! - you don't actually have SSL turned on!!!
      The fields are blank! therefore its going striaght in and straight out.

      So, you might have already mentioned this. Where are those logs from???
      Is it the f5, the client or the server??? (TrendMicro side)

      • MadMick's avatar
        MadMick
        Icon for Nimbostratus rankNimbostratus
        Apr 27, 2022

        The log I sent you is from the client where TrendMicro agent is installed.

        If I remove proxy from the configuration, the agent can be activate.
        If I put the proxy in the configuration I receive the handshake error.
        If I put the proxy in my browser settings, I can navigate withous any problem.

        Is there any way to trace what BIG-IP proxy is doing for my client?