If the freeradius daemin sees nothing and is listening on the ports (netstat) and theres no firewall (iptables) then either  something somewhere else on your network is blocking the RADIUS packets or your NAS config is wrong (either its AAA settings or its eg management routing )<br>
<br>
alan<br>
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Sent from my Android device with K-9 Mail. Please excuse my brevity.