Hi,
I really cant help for that the docu is unprecise, has lacks etc. The "credentials " and understand as certs, the "configure" is very sparse if PORTS have to be taken in consideration. - But we are really getting somewhere taking PORTS into my knowledge. But I do not how to configure this and where. If the router has the 1812 configured I would assume that radius would return through the same port. I will try to read through the files in raddb to find something about it. Could /etc/service give a clue?
its a very very special router that can receive and process and forward/proxy RADIUS traffic. most routers are the originator of RADIUS traffic, not recipients of it. all you need is to add your router IP address to the RADIUS server as a client and then start throwing tests from it. if the router has a RADIUS test function (via command line or GUI) then use it to see the RADIUS auth requests come through.. otherwise you'll have to have real clients connecting to it... alan