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

Forum Discussion

Ian_Støttrup's avatar
Ian_Støttrup
Icon for Nimbostratus rankNimbostratus
Sep 19, 2017

SSH-proxy and keyboard interactive authentication not working

I am trying to test the SSH proxy funtionality of AFM, but I am not succeeding at all. I am aiming for keyboard interactive authentication (username/password), but all I get is "Authentication failed...
AFM
keyboard interactive authentication
LTM
security
ssh
Ian_Støttrup's avatar
Ian_Støttrup
Icon for Nimbostratus rankNimbostratus
Sep 20, 2017

I believe I got it working now. Instead of using the public key on the backend server placed in /etc/ssh/ssh_host_rsa_key.pub, I used the public key that was in my clients .ssh/known_hosts, after having connected directly to 10.128.10.128. This key I placed in the Real Server Auth Public Key field and now I can log in, through the Bigip, using username/password and SCP is not allowed through, which was my goal.