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On a new Server Core installation, the rewall is enabled by default and blocking almost everything You can turn off the rewall by using the following command, which opens up the ports and allows Remote Desktop, SNMP, and so forth You can enable the rewall again by changing disable to enable

14

Now that you have Typhoeus installed, you re ready to make some requests Typhoeus has three classes that manage making HTTP requests: request, response, and hydra The request class contains all the information about a request, including the URI, the headers, the request body, and other parameters, such as timeout and authentication The response object holds information about the response, including

.

You can con gure the rewall elements using the netsh command and its various components For example, to enable the Remote Desktop, use the following command:

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There is an easier way, however The Windows Firewall MMC snap-in can connect to a remote machine, so let s try that approach as opposed to working out the hundreds of possible netsh commands If you are con guring many servers, however, it would be worth creating a script with the netsh commands, or con guring the rewall using Group Policy If you want to use Group Policy, the rewall is available as part of Computer Con guration, Windows Settings, Security Settings, Windows Firewall with Advanced Security Right-click Inbound Rules (see Figure 14-8) and select a new rule, and you can use the prede ned Remote Administration and Remote Desktop rules It might not be practical to place the Server Core machines in their own OU for the application of the Group Policy, so you can use a WMI lter to check the OperatingSystemSKU of the server for the values 12, 13, and 14, which correspond to the Datacenter, Standard, and Enterprise Server Core installations, respectively A sample WMI lter follows:

select * from Win32_OperatingSystem where OperatingSystemSKU=12 or OperatingSystemSKU=13 or OperatingSystemSKU=14

Before you try this, you get an error when you launch the remote rewall snap-in because the rewall you are trying to con gure blocks remote management by default So, you need one more netsh command to enable the remote management capability:

All print controller implementations rely on the print document's print events to gather the drawing commands into the graphics object, either to spool to the printer or to show on the screen: void printDocument1_PrintPage(object sender, PrintPageEventArgs e) { // Draw to the eGraphics object Graphics g = eGraphics; using( Font font = new Font("Lucida Console", 72) ) { gDrawString("Hello,\nPrinter", font, ); } } Notice that this sample PrintPage event handler creates a font only for printing For a single page, this code is fine, because it creates the font and then reclaims the font resources when the printing is complete However, if we're printing more than one page, it's wasteful to create the font anew on each page On the other hand, creating a font for printing and then caching it in a field seems wasteful if the font is never used again after the print job What we'd really like is to be notified when a print job is started and ended so that we can have tight control over print-related resources For this, we use the print document's BeginPrint and EndPrint events: Font font = null; void printDocument1_BeginPrint(object sender, PrintEventArgs e) { // Create font for printing font = new Font("Lucida Console", 72); } void printDocument1_EndPrint(object sender, PrintEventArgs e) { // Reclaim font fontDispose(); font = null; } Notice that the BeginPrint and EndPrint events come with an instance of the PrintEventArgs class The PrintEventArgs class derives from the CancelEventArgs class and provides no extra members As you might guess, the Cancel property of the PrintEventArgs class (inherited from the CancelEventArgs base class) is used primarily by a print controller that shows a UI, such as PrintControllerWithStatusDialog, to cancel a print job Unlike BeginPrint and EndPrint, the PrintPage event comes with an instance of the PrintPageEventArgs class: class PrintPageEventArgs : EventArgs { public bool Cancel { get; set; } public Graphics Graphics { get; } public bool HasMorePages { get; set; } public Rectangle MarginBounds { get; } public Rectangle PageBounds { get; } public PageSettings PageSettings { get; } }.

Now let s manage remotely: 1 Open a new MMC instance (Start, Run, MMC) 2 From the File menu, select Add/Remove Snap-In 3 Select Windows Firewall with Advanced Security, and click the Add button (see Figure 14-9)

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