IIS access loglarında X-Forwarded-For ile iletilen ip in görüntülenmesi

1. Open IIS Manager.
2. Select the site or server in the Connections pane, and then double-click Logging. Note that enhanced logging is available only for site-level logging - if you select the server in the Connections pane, then the Custom Fields section of the W3C Logging Fields dialog is disabled.
3. In the Format field under Log File, select W3C and then click Select Fields....
   
4. In the W3C Logging Fields dialog, click Add Field.... Note that enhanced logging is available only for site-level logging - if you selected the server in the Connections pane, then Add Field... is disabled.
   
5. In the Add Custom Field dialog, enter a Field Name to identify the custom field within the log file. Please note that the field name cannot contain spaces.
6. Select the Source Type. You can select Request Header, Response Header, or Server Variable (note that enhanced logging cannot log a server variable with a name that contains lower-case characters - to include a server variable in the event log just make sure that its name consists of all upper-case characters).
7. Select Source, which is the name of the HTTP header or server variable (depending on the Source Type you selected) that contains a value that you want to log. You also can enter your own custom source string. For example, to record the custom HTTP Header "X-FORWARDED-FOR", enter that string in Source.
   
8. Click OK.
9. Click Add Field... for each additional custom field you want to add. You also can click Remove Field to remove a custom field you added or click Edit Field... to edit it.
10. Click OK.
11. Click Apply in the Actions pane to apply the new configuration