Networks

I think you have a problem there. You can not restrict further on the hardwarelevel of the jetdirect printserver. There are a few options.

1. For printing make use of another protocol, e.g. IPX/SPX (NWLink). Disable the IP protocol in the jetdirect. Make a new security group, called e.g. HPLaserjet_A. Make all 20 users member of that security group. Set the rights on the printer to only accept printjobs from that security group.

2. If that is not an option, you could put the printers in a different subnet, which the clients are not able to connect from the workplace. Also here make a new security group, called e.g. HPLaserjet_A. Make all 20 users member of that security group. Set the rights on the printer to only accept printjobsfrom that security group. This way the clients cannot connect directly through direct ip printing, they have to print through the printserver. No rights, no prints.

Good luck.

Go to Active Directory Users and Computers (AD, if your have it0, create an OU named 20Users. (or named it whatever you want). Add the the twenty users to this OU as members. Go to the printer server, go to start, settings, printers. Right click the printer icon, click Security Tab. Remove the default users of the printer like Administrator, Creator Owner, Everyone, Print Operators, Server Operators. Then add 20Users.
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You don't need a separate OU, you can simply create a security group within AD in the same OU as the users. Add the users to that security group, then give the group rights to the printer - go to the Printers window on the server, right click and select Properties, go to the Security tab and add the group, and select the check boxes to allow Print, Manage Printers and Manage Documents access as you want. Make sure you remove the Everyone group (and any other groups or users except for Administrator and whatever other accounts or groups you use to manage the printers) from the Security settings to ensure that other users can't connect to or print to the printer. Hope this helps!

Did you try going to the printer server, start, settings, printers. Right click the printer icon, click Security Tab. Remove all the default users of the printer then add individually the 20 users you want to have print right on this printer?