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

Forum Discussion

THE_BLUE's avatar
THE_BLUE
Icon for Cirrostratus rankCirrostratus
May 28, 2023

Secure connection failed - pool 443

i have 2 vs of port 443 and 80 , and pool of 443 and 80 too . from server itself, the website works fine with both ports . But from waf if i enable the vs with pool 443 i receive " secure connection ...
application delivery
security
Enes_Afsin_Al's avatar
Enes_Afsin_Al
Icon for MVP rankMVP
May 28, 2023

Hi THE_BLUE,

If server side ssl, server-ssl profile is required. There may be a issue with the cipher configuration.

Can you try sending a curl request to the server from the F5 command line?

curl -kv "https://serverip" -H "Host: example.com"

If the command returns an SSL error, there may be SNI problem.
https://support.f5.com/csp/article/K41600007

THE_BLUE's avatar
THE_BLUE
Icon for Cirrostratus rankCirrostratus
May 28, 2023

with port 443 i have tried with server ssl and without and i get the same result .

i will try now to use the mentiond command .

  • Leslie_Hubertus's avatar
    Leslie_Hubertus
    Ret. Employee
    Jun 07, 2023

    Did it work? 

    • THE_BLUE's avatar
      THE_BLUE
      Icon for Cirrostratus rankCirrostratus
      Jun 11, 2023

      Yes, The issue was related to SNI and i hve inject it to server with iRule.