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

Forum Discussion

Domai_23823's avatar
Domai_23823
Icon for Nimbostratus rankNimbostratus
Mar 06, 2019

Slow SSL handshake on "Performance(Layer 4)" VIP.

Hello I am seeing a weird issue I have a "Performance(Layer 4)" VIP and the issue I see is when I do a - time openssl s_client -connect : I see a 4 sec delay on the initial SSL handshake after C...
application delivery
LTM
Amy003_314955's avatar
Amy003_314955
Icon for Cirrus rankCirrus
Mar 07, 2019

Please enable TCP loose initiation in the TCP profile associated to this VIP.

 

  • rafaelbn_176840's avatar
    rafaelbn_176840
    Icon for Altocumulus rankAltocumulus
    Mar 08, 2019

    Amy003, I'm curious about this. What is your thinking? To my knowledge, loose initiation is useful for quiet yet long lived connections, since the BIG-IP would accept the packet without seeing the 3-way-handshake. Can you explain? Cheers! Rafael