Radius "MONITOR" option

Arran Cudbard-Bell a.cudbardb at freeradius.org
Sat Aug 25 22:44:13 CEST 2012

On 25 Aug 2012, at 21:36, Ethan Whitt <ethan.l.whitt at gmail.com> wrote:

> The load balancer sends the health-check on udp/1813 with only
> "Monitor" in the payload (per a sniffer capture).  From my
> understanding - this health-check is not a properly formatted radius
> packet?  The expected response is the exact same - a packet from
> udp/1813 with only "Monitor" in the payload.
> Is this possible with Free Radius with a reply message?

No. A UDP packet with just the string "Monitor" is not a valid RADIUS packet. No FreeRADIUS will not process this, and you will not be able to formulate a reply.

Please send me the packet capture, so I can verify what you're saying is correct.


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