Changes to the Server

Part of a network administrator's job involves some tinkering with the server. Although this might be unavoidable, it can sometimes lead to several unintentional problems. Even the most mundane of all server tasks can have a negative impact on the network. The following are some common server-related tasks that can cause problems:

• Changes to user accounts-For the most part, changes to accounts do not cause any problems, but sometimes they do. If after making changes to user accounts, a user or several users cannot log on to the network or access a database, the problem is likely related to the changes made to the accounts.
• Changes to permissions-Data is protected by permissions that dictate who can and cannot access the data on the drives. Permissions are an important part of system security, but changes to permissions can inadvertently prevent users from accessing specific files.
• Patches and updates-Part of the work involved in administering networks is to monitor new patches and updates for the network operating system and install them as needed. It is not uncommon for an upgrade or a fix to an operating system to cause problems on the network.
• New applications-From time to time, new applications and programs-such as productivity software, firewall software, or even virus software-have to be installed on the server. When any kind of new software is added to the server, it might cause problems on the network. Knowing what has recently been installed can help you isolate a problem.
• Hardware changes-Either because of failure or expansion, hardware on the server might have to be changed. Changes to the hardware configuration on the server can cause connectivity problems.