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.

  • 27 Users Found This Useful

Was this answer helpful?

Related Articles

How to create a certificate signing request [CSR] from IIS 7.5 in your VPS?

Follow the below mentioned steps to create Certificate signing request from IIS 7.5 in your VPS:...

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...

How to Add Website in IIS?

This article will assist you to add new website in IIS. If you have opted for the WebsitePanel,...

How to create an FTP account from IIS in Windows Server 2003?

This article will guide you on how to create an FTP account in Windows Server 2003 from IIS. For...

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...