What is the correct way to distinguish services to which RADIUS request belongs?

Posted by John on Server Fault See other posts from Server Fault or by John
Published on 2010-05-18T06:18:06Z Indexed on 2010/05/18 6:21 UTC
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If I have 1 generic RADIUS server and a number of clients (VoIP server, VPN server, WIFI access point) how to distinguish senders (NAS) of access and accounting requests?

I didn't found anything helpful by reading all related RFCs, there just NAS-IP-Addess or NAS-Identifier is required, but this attributes usually represents IP address of the NAS and this address can not be used as a robust identifier, because it's often possible to fall into the case when 2 different NASes are running on the same server and this attributes can not be customized. Any ideas?

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