How to build the Radius iApp without using NAS

Hi, it looks like that address is only used in the monitor configuration. You could either a) put in a fake IP address there, then disable strictness on the iApp and manually reconfigure the RADIUS monitor to not use a NAS address, or b) export the RADIUS iApp template, edit the line:

string nas_ip display "xxlarge" required validator "IpAddress"

to read

string nas_ip display '"xxlarge" validator "IpAddress"

and then rename the template and reimport it to BIG-IP.

I would go with option b if you want to preserve strictness on your deployment.