How to deny URL sequence from IIS?

Request Filtering is a built-in security feature of IIS. Using Request Filtering feature one can assign maximum URL length, Query String size, content request length and many other restrictions server wide as well as website wide. Deny URL Sequences element of Request Filtering helps to deny access for URL sequence patterns that an attacker might try to exploit. Follow these steps to deny URL sequence from IIS.

  1. Login to your VPS.

  2. Open IIS Manager. Unde Connections pane, click on VPS Name.

    IIS Manager

  3. Open Request Filtering as shown in below image.

    Click on Request Filtering Option

  4. Move to URL tab and click on Deny Sequence.

    Click on Deny Sequence Link

  5. An Add Deny Sequence dialog box will appear, enter the URL sequence which you wish to block. For Example, if you wish to block the common SQL Injection term 'varchar', enter 'varchar' character sequence in the Deny Sequence box. When you wish to block entire directory access, give '..' as shown in below image.

    Add URL Sequence

  6. Click OK. Now, when anyone tries to enter any of the mentioned terms into your URL Sequence, they will receive the HTTP Error 404.5 – URL Sequence denied error message.
 
NOTE: Choose your character sequence wisely. If your site uses any of the terms that you deny, your site visitor will receive the HTTP Error 404.5.

  • 29 Users Found This Useful

Was this answer helpful?

Related Articles

How to Configure FTP User Isolation in IIS 7?

Following article will assist you to configure FTP user isolation in IIS web server. In IIS...

How to Run Multiple PHP Versions in Windows VPS?

There are times when your PHP websites rely on functions/features that are available only in some...

How to change ASP session timeout from IIS 7?

Sessions are used to maintain a stateful HTTP connection. When session state is enabled for your...

Fix :: Operation must use an updateable query." for ASP pages

Problem Statement Operation must use an updateable query." for ASP pages Cause There might be...

What SMTP Settings Should I Use in web.config file?

In web.config SMTP settings, you can use your existing email address (whose authentication you...