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

Forum Discussion

abhy201's avatar
abhy201
Icon for Nimbostratus rankNimbostratus
Aug 09, 2018

Could not establish trust relationship for the SSL/TLS when load balancing IIS Servers

Hello, trying to use F5 VIP to load balance traffic from IIS Server(Client) to an IIS Server Pool. I get the below handshake error when I use the F5 VIP in the end point url on the IIS web.config fil...
big-ip
LTM
security
patonbike's avatar
patonbike
Icon for Cirrus rankCirrus
Aug 09, 2018

Which serverssl profile are you using? What certificate is installed on the IIS side?

 

Try "server certificate: ignore" just to see if it fixes it. If it fixes the problem, then the F5 doesn't trust the cert that IIS is presenting.