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

Forum Discussion

Agathe_309970's avatar
Agathe_309970
Icon for Altocumulus rankAltocumulus
Sep 21, 2017

Allow authentication request on the F5

Hello,   I have an reverse proxy entry. This entry redirects flows on a server which manage an authentication via a popup (authentication supports by the server and not the F5). But, the F5 seems ...
application delivery
big-ip
LTM
stan_piron's avatar
stan_piron
Icon for Cumulonimbus rankCumulonimbus
Sep 21, 2017

Hi,

 

But, the F5 seems not allow these authentication flows. : Why do you say that? did you investigate what's wrong?

 

what authentication is configured on the server? pop-up authentication can be

 

  • basic
  • NTLM
  • Kerberos

Basic authentication won't have any issue with F5 between client and server

 

NTLM can have some issues if Oneconnect profile is enabled on the VS and NTLM profile not enabled. I also got some issues if Analytics profile enabled with javascript injection... I was not sure the issue was chunking issue.

 

If Kerberos is used, make sure your kerberos configuration is compatible with load balancing (per application SPN, not per machine, ...)