webconfig question


What is the role of <clear/> in below code snipped and will it have any effect on functionality of <add name="X-XSS-Protection" value="1"/>

        <add name="X-Frame-Options" value="DENY"/>
        <add name="X-XSS-Protection" value="1"/>

Open in new window

Dinesh KumarAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Dan McFaddenSystems EngineerCommented:
It removes all previously declared options.

Reference link:  http://msdn.microsoft.com/en-us/library/aa903345(v=vs.71).aspx

Dinesh KumarAuthor Commented:
1. in my case, I see that I  am having <customHeaders> only once, do <clear/>
 solve any purpose or can I safely remove it?

2. If I remove it I want to ensure that, the following should not affect in any way:

 <add name="X-XSS-Protection" value="1"/>
Dan McFaddenSystems EngineerCommented:
In your example config, clear would remove any previously declared (and inherited) keys from your application.  Only the defined keys after the clear will be used.

If you remove it, any upstream (parent) configuration will be included in your app.  But declaring this in your web.config should override anything that inherited.

Acronis Data Cloud 7.8 Enhances Cyber Protection

A closer look at five essential enhancements that benefit end-users and help MSPs take their cloud data protection business further.

Dan McFaddenSystems EngineerCommented:
You can also read thru the article.  Maybe it will make it clearer for you:


Dinesh KumarAuthor Commented:
in my case, it will override  <customHeaders>
defined in machine config?

as I see there is one tag only in  web.config <customHeaders>
Dan McFaddenSystems EngineerCommented:
A clear will remove the customHeaders config section from the web app that uses the configuration above in its web.config.

Then only your X-Frame-Options and X-XSS-Protection items will be used.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft IIS Web Server

From novice to tech pro — start learning today.