To see if the WiKID server's firewall is allowing connections from your network client (VPN or web application, e.g.), you can run this command using grep to limit the request to a specific protocol:

iptables -L | grep radius


ACCEPT     udp  --  localhost.localdomain  anywhere            state NEW udp dpt:radius 
ACCEPT     tcp  --  localhost.localdomain  anywhere            state NEW tcp dpt:radius 



But instead of localhost you will see your IP address.