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Applying updates be they service packs, software updates, or security updates is a significant part of the maintenance cycle. All administrators should subscribe to the Microsoft Security Bulletins at www.microsoft.com/technet/security/bulletin/notify.mspx. These e-mail notifications provide information about newly released bulletins that will be relevant to the platforms that database administrators are responsible for managing. The remainder of this section describes the processes that administrators should go through prior to deploying updates to production database servers.

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Orin Thomas Installing any version of Exchange can be intimidating, though Exchange Server 2007 vastly simplifies the process Exchange has always required an exhaustive amount of preparation prior to installation, and even when you have performed the task several times, a little voice at the back of your mind always asks you, Have I forgotten something important The first Exchange environment I worked on had been installed by someone who had a throw it in, run install, and figure it out later approach to deployment The deployment functioned only with the assistance of an elaborate series of workarounds Those workarounds could have been avoided if the person who made the original deployment had spent some time with the documentation prior to attempting installation Because of my experience having to manage a not-quite-right deployment, I was rather nervous when I first fully deployed Exchange in a production environment.

A custom subnet mask is not restricted by the same rules used in the classful method. Remember that a subnet mask consists of a set of four numbers, similar to an IP address. Consider the default subnet mask for a class B network (255.255.0.0), which in binary format would be the following: 11111111 11111111 00000000 00000000 This mask specifies that the first 16 bits of an IP address are to be used for the network ID and the second 16 bits are to be used for the host ID. To create a custom subnet mask, you would just extend the mask into the host ID portion. However, you must extend this by adding ones from left to right. Remember that a subnet mask must be an unbroken string of ones followed by an unbroken string of zeroes. For example, a custom subnet mask might look like this: 11111111 11111111 11111000 00000000 The value 11111000 in decimal format would be 248, making this IP address 255.255.248.0. Table 13-2 shows the possible values for an octet in a custom subnet mask.

14. Double-click an empty area on the form and create a Form1_Load event handler. 15. Add code to create a BindingSource global to the form and then add the code to configure the data binding to the Form1_Load event handler so your form code looks like the following:

I did not want future IT pros taking my name in vain the way I d muttered in the server room about the guy who d put together that original Exchange 55 box The best way to deal with these sorts of concerns is to perform multiple practice deployments I do not mean running a pilot program at your organization, though you should do that as well I mean using virtual machine software to repeatedly build up and tear down Exchange Server 2007 deployments until the process itself becomes second nature Exchange Server 2007 is, if not the heart of an organization, the circulatory system that keeps everything moving Virtual deployments give you a chance to learn from your mistakes and work out the kinks in any deployment plan long before any real e-mail gets put through the system.

VPN protocol By default, only PPTP is enabled for VPN client access This can be modified to include L2TP/IPSec only or both protocols When this setting is modified, the system policy rule is updated to allow the appropriate protocol Network rules Enabling VPN client access does not modify the network rules configured on ISA Server When you install ISA Server, two network rules are created that include the VPN Clients network, one specifying a route relationship between the VPN Clients network and the internal network, and one specifying a NAT relationship between the VPN Clients network and the external network The second rule is part of the Internet access rule that also defines the relationship between the internal network and external network Firewall-access rules By default, clients on the VPN Clients network cannot access any resources on any other network.