FreeRadius Server Sizing recommendations

Wang, Yu ywang10 at
Wed Sep 3 22:21:17 CEST 2014

A server with Xeon 2.4 GHz dual core CPU, 4-8GB RAM, 250GB 7.2k SATA hard drive, dual port gigabit NIC will be sufficient for your system. You can achieve 10 auths/sec easily with most default settings on radius and samba/winbind.

Yu Wang

-----Original Message-----
From: at [ at] On Behalf Of Dennis Xu
Sent: Tuesday, September 02, 2014 2:57 PM
To: A L M Buxey
Cc: FreeRadius users mailing list
Subject: Re: FreeRadius Server Sizing recommendations

I am not sure about the certificate size. But it will be using 2048bit key. The concurrent authentication request will be less than 10 per second. Backend authentication will use Active Directory.



----- Original Message -----
From: "A L M Buxey" <A.L.M.Buxey at>
To: dxu at, "FreeRadius users mailing list" <freeradius-users at>
Sent: Tuesday, September 2, 2014 10:45:10 AM
Subject: Re: FreeRadius Server Sizing recommendations


> Does FreeRadius has a server sizing guide to help people to choose the right hardware? I want to deploy two Linux servers(on VMware) in active/standby mode to serve maximum 5k PEAP authentication users. What would be the recommended server specs(such as CPU,RAM,Storage,IOPs) for this deployment?

certificate size? concurrent authentication requests? backend authentication method? 

there is no direct sizing guide but there are benchmarking tools that you can use to get a measure of performance/capacity

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