Prevent uid sharing or hot to allow use uid only once

[Sergio Belkin]

Hi,

Let's suppose that John Doe comes and login with jdoe uid, then  Joe
comes and wants to use wireless network, but he has not entry neither
Ldap nor in radius users file, so he ask for jdoe that pass him its
uid and password to login. Sorry if that sounds somewhat stupid but
can we prevent that from radius? (please don't tell me to fire John
Doe ;)  ).


Thanks in advance!
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Sergio Belkin -