free radius behind a load balancer?

Coy Hile coy.hile at
Thu Jan 14 16:51:18 CET 2021

> On Jan 14, 2021, at 10:43 AM, Alan DeKok <aland at> wrote:
> On Jan 14, 2021, at 10:39 AM, Coy Hile <coy.hile at> wrote:
>> Has anyone tried putting the FreeRADIUS server behind a load balancer? I see dynamic-clients does queries based on the Packet-Src-IP-Address, but can one reasonably do similar based on NAS-IP-Address (assuming that the client sends that attribute?
>  Lots of people put it behind a load balancer.  The only real caveat is that if you're doing EAP, the load balancer has to be aware of that.  And then load balance on things like the User-Name, instead of randomly spamming packets across the back-ends.
>  IIRC things like the F5 load balancers don't do that.  But FreeRADIUS as a load balancer will do that. :)

Work isn’t doing that, at all. We’re simply using RADIUS to authenticate and authorize administrative access to network devices. Nothing cute.

Coy Hile
coy.hile at

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