vb.net code 39 generator Step 7: Implement Restrictions in Visual Studio .NET

Create Code128 in Visual Studio .NET Step 7: Implement Restrictions

Step 7: Implement Restrictions
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Finally, it is time to implement your strategy. By this stage in the process you should have a complete design for how you want to manage your network as well as for what communication patterns you want to permit within it. The implementation should be relatively straightforward at this point. However, you do want to ensure that several things get done.
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Before we go further, if you are like most network managers, you get cold chills thinking about rolling out changes that could disrupt communication. After all, as the old saying goes, nobody ever calls the helpdesk to inform them that everything is working today (and if they do, you have a whole different set of problems to address). Fortunately, there is a trick. Obviously, you want to eventually require authentication of all or most network connections. However, you may want to start out by requesting authentication instead. That way you can test the policies, monitor where IPsec negotiation fails, and adjust as necessary, all while maintaining full connectivity. This permits you to do a safer rollout that is far less likely to result in events that have an adverse impact on your opportunities from promotion out of network management. That being said, there are a number of other restrictions that you need to include in your plan.
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First, reduce the scope of your accounts, particularly the highly privileged accounts. Everyone that accesses computers at different sensitivities should, at least if they have high-level permissions on those computers, have different accounts. For example, a highly trusted server administrator might need a domain administrative account for managing the DCs, a level 7 administrative account for managing servers at sensitivity level 7, and an information worker account for e-mail and surfing the Web. An HR employee might need one account for performing HR-related tasks and a different account for reading e-mail and working on presentations. Alternatively, you might decide that based on your risk management philosophy and the fact that both uses are at very low privilege levels, the same account might suffice. However, you should never permit an account that has administrative privileges at one level to access resources at a different level. Administrative accounts at any level must only be used to administer computers at that level.
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Much of the isolation must be done by organizational security policies, not necessarily technical policies. You simply cannot technically enforce many of the isolation decisions. For instance, your domain administrators are omnipotent within the scope of your network. You cannot restrict them from seeing or doing anything within the network. However, you can set rules and guidelines for them to follow, and track those guidelines. You must also have penalties for violating those guidelines. An administrator who refuses to take necessary steps to keep your network protected should be turned into an ex-employee.
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Service accounts are a common problem in Windows. It is a well-known fact that any administrator on any computer has access to the clear-text password of all services and of
13:
Securing the Network
all interactive users on that computer. There is no standard log file where these nuggets are stored, but with commonly available hacking tools it is a simple matter to get them. For that reason, managing service accounts is crucial. It is still quite common to see services running on many computers in a network under a domain admin account. This exposes a domain admin account on every computer in the network. For this reason, the scope of service accounts must be limited. A logical way to do this is to only use service accounts within a sensitivity level. For example, as mentioned earlier, the backup service might run in one service account on computers at level 7 and a different account on computers at level 9.
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