Radius server test connectivity fails : Error: '1812/udp' is not a valid Radius authentication port.
Article ID: CTX570580
Updated On:
Description
Radius server test connectivity failure. Error:
"Either 'ServerIP' is not a valid Radius server, '1812/udp' is not a valid Radius authentication port or Radius client is not configured properly in the Radius server."
Resolution
Suggest to free UDP:1812 traffic from NetScaler to Radius server in your environment
Problem Cause
UDP Port is unreachable from NetScaler, you may confirming this block in NetScaler nstrace.
Filtering the UDP traffic with Radius Server IP in Wireshark, Destination unreachable(port unreachable) info message will show up like below: 
Click here for NetScaler nstrace.recording
.
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