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Re: difference between accounting and authentication



Within the PAM framework, the principle is simple:

Authentication:  verifying the user _is_ the user.
Accounting:      system contraints on whether the user is permitted
		 access to a given service (at a given time).

In practice, this are a little more vague.

I guess things like pam_listfile (a module that only supports the
authentication component to PAM) could equally well be an accounting
module, however, modules like these might not want to permit certain
users to authenticate (type a password for example) for certain
services (rlogin) so they reasonably have an authentication component
to prevent this.

Hope that helped

Andrew

> 
> Hi,
> 
> I'd like to know what is the difference between
> accounting and authentication.
> 
> Some examples are welcome.
> 
> Thanks
> 
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