Figure 9-13 Internet Explorer default error messages are not very informative in Software

Making Code-39 in Software Figure 9-13 Internet Explorer default error messages are not very informative

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4 Retry opening the page that gave the error If you are still getting the same or an even less informative error message, try looking at the error message in IE on the server computer Here, by default, you should see detailed error messages as shown in Figure 9-14 5 If you get friendly error messages when you open IE directly on the server, open the IIS Manager, click the web site in the Connections tree on the left, double-click Error Pages in the center Workspace pane, and in the Actions pane, click Edit Feature Settings 6 In the Edit Error Pages Settings dialog box, click Detail Errors For Local Requests , and click OK Now when you open the site in error you will get the detailed message shown in Figure 9-14

Figure 9-14

IIS 7 keeps extensive logs of what is happening on a web server and the hosted sites You can tailor these logs to your needs and easily review them 1 Click Start | Administrative Tools | Internet Information Services (IIS) Manager In the Connections tree on the left, click the server whose logs you want to configure; if needed, scroll down the Workspace pane, and doubleclick Logging

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2 Make any desired changes to Logging, note the directory where the logs are kept, and, in the Actions pane, click Apply Try to open the web site 3 Click Start | Computer and navigate to the directory noted in the last step (%SystemDrive% is normally the C: drive) Display folders in the left pane if they aren t already, open the Logs and LogFiles folders, and double-click a log file for the day you want to look at Notepad will open and display the log file

The log file #Fields: line shows the fields that are being displayed (You can control the fields displayed by clicking Select Fields in the Logging feature) The meaning of the default fields is shown in Table 9-2

Field Name date time s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs (user-agent) sc-status sc-substatus sc-win32-status time-taken

Description Date the request occurred Time the request occurred Server IP address HTTP method used in the request Universal Resource Identifier (URI) that is the target of the request URI query used in the request Server port address Name of the authenticated user Hyphen is anonymous user User IP address The browser used to generate the request HTTP status code (error code, like 404) HTTP substatus code (error decimal code, like 1 in 4041) Windows status code Time the request took in milliseconds

The HTTP status and substatus codes are described in several places on the Internet, but probably best on Microsoft s TechNet at:

http://technet2microsoftcom/windowsserver/en/library/852e7f92-58c347f3-8b37-8a630839a90d1033mspx mfr=true

Tracing, which is an IIS 7 role service that is not installed by default, traces failed requests to troubleshoot web performance When it s installed, you can establish a set of rules that will generate log entries when the rules are met The rules can specify status codes, methods, and other end products Use the following steps to install the role service, set up the rules, and implement tracing: 1 Click Start | Server Manager In the Server Manager tree on the left, open Roles and click Web Server (IIS) Scroll down the right pane and click Add Role Services

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2 Scroll Role Services, click Tracing, click Next, click Install, and click Close Close Server Manager 3 Click Start | Administrative Tools | Internet Information Services (IIS) Manager, and in the Connections tree on the left, click the web site you want to trace 4 In the Actions pane under Configure, click Failed Request Tracing, click Enable, make any desired changes to the directory and/or the maximum number of trace files, and click OK 5 Scroll the Workspace in the center, and double-click Failed Request Tracing Rules 6 In the Actions pane, click Add, select the content to trace, and click Next Select the conditions and enter the specifics that will generate a trace log entry Select the trace providers, and click Finish The rule will be added to the tracing rules

7 Click Start | Computer and navigate to the directory C:\inetpub\logs\ FailedReqLogFiles and open the folder that you see Finally, double-click the XML file Internet Explorer will open and display the summary 8 Click the Compact View tab to see the trace steps and the detail for each step, as shown in Figure 9-15