Specifications

RSLinx – Training Guide 73
If you do NOT have a domain controller on your network, you will need to setup a PC
running Windows NT Server (not workstation) as a domain controller.
Don’t do this on your office or plant network without checking with your network
administrator first.
A primary domain controller is configured during the Windows NT Server (not
workstation) install. If you are upgrading an existing NT install, you must choose to do
a new install of NT, not the upgrade when prompted. Just install over the existing NT
directory. The setup program will prompt you to choose between a Primary Domain
Controller, a Backup Domain Controller or a Stand Alone Server. Chose Primary
Domain Controller and enter a name for your Domain when prompted. Then continue
with the install as you normally would.
Once NT Server is installed as a Domain Controller then go to the start menu, choose
administrative tools, and User Manager for Domains. This application will allow the
Domain Administrator (YOU!) to add users to your newly created domain. Add accounts
for all your users to your domain. Next go to the start menu, administrative tools, and
choose Server Manager. Add accounts for all PCs you want in the domain. This adds
the actual machine (PC) name to the domain, not the user.
Now you are ready to go configure DCOM on your PCs that will be running Rockwell
Software. Since DCOM uses Windows security, there are several ways to enable a
DCOM connection between two PCs
Allow some or all domain users privileges under DCOM Configuration.
In order to do this Access control must be set to “user level” first under the access
control tab of network configuration. Go to Network Neighborhood and right click.
Choose properties and go to the access control tab. Select “user level access control.”
You must fill in a domain name in the text box. Enter the name of the domain from
which you wish to allow users access You will have to reboot at this point.
Next go to the start menu and choose run. Type in “DCOMCNFG” and click OK. Go to
the Default Security tab and click “edit default”. Click add and choose the domain from
where you want to add users. Choose “Everyone” from the list. This will grant all
domain users DCOM access to this Windows 95 or 98 system.
• As an alternative, you may choose to add only specific users that you want to
grant access to this PC.
Also on this tab, check the “Enable remote connection” check box at the bottom of the
dialog. Finally, go to the Default Properties tab and check the “Enable Distributed COM
on this computer” check box.
The above method allows users to access any COM enabled application on the PC.
The most secure method is to grant users rights only to specific applications. This is
also done through the DCOMCNFG application.