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pwilson33
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Jun 04, 2025

F5OS Radius failures with Clearpass

Hello, 

First post ever on devcentral so I ask that you take it easy on me haha. 

Anyways, recently stood up some new R-series F5s and F5OS is a new world for me. Currently running iSeries appliances. 

Going through some of the basic configurations and I've made my way to authentication. I've added radius as one of my accepted authentication options and created my server group with the clearpass server attached in that group. Selected radius, put in the correct IP, radius secret, etc. Per the documentation it looks good. 

Going into clearpass for those familiar - Created my new F5 device, put in the shared secret, added new device to my existing F5 device group. Essentially all I've ever had to do when working with other vendors. 

Attempting logins with my user account I get hit with "Permission Denied" at the login screen. This is where I am lost. I check clearpass, my access tracker says I successfully authenticated. Clearpass shows no obvious issues. 

I log back into F5OS with my local admin and I check the login activity. Shows my user account and a big ole "Success" for the login attempt. 

I apologize for the word salad. I was trying to put my process out there including that both F5OS and Clearpass seem happy with my attempt but the F5OS login page says denied. Anyone have any R-series appliances using clearpass for radius and authentication? I'm curious what I'm missing.