Printing as another user

[Anonymous]

> Michael De Vlaminck wrote:
> >> Michael De Vlaminck wrote:
> >>> Hello,
> >>>
> >>> Is there a way to disable the -U option from /usr/bin/lpr?
> >>> Because I'm setting up a printing system using CUPS. We also need an accountingsystem (we have pykota fot that) but the problem is that we can't trust the username that pykota recieves because of the -U option from lpr.
> >> You can enable authentication (so that users need to provide a
> >> password), or edit the source code to remove the -U option.  However,
> >> the latter change will not prevent users from writing a CUPS-based
> >> program that submits a job with an alternate username.
> >
> > When I enable authentication, is the password that the user needs to provide the same as the user needs to login to our systems? Or is it a completely different userdatabase?
>
> Normally, yes, however some Linux distributions (SuSE in particular)
> use the Digest (lppasswd) authentication option instead, which means
> you'll need to setup separate passwords for every user.
>
> Also, CUPS uses PAM on platforms that support it, so you can
> authenticate against accounts in the /etc/passwd file, LDAP accounts,
> Kerberos, etc. (however, note that we don't support Kerberos
> authentication via SPNEGO yet, so users will need to provide their
> password - no single sign-on support yet...)

I enabled authentication and it works, but it seems that everytime I have to enter my password twice when printing. Is this normal?

thx
Michael De Vlaminck