![]() This policy will enforce TLS on your site and all subdomains for a year. Read more in my blog on HSTS - The Missing Link In Transport Layer Security and check out HSTS Preloading too. This means any bookmarks, links or addresses the user types will be forced to use HTTPS, even if they specify HTTP. HSTS allows you to tell a browser that you always want a user to connect using HTTPS instead of HTTP. With browsers defaulting to HTTP when you type in an address like .uk, this has previously been the only way. Sites have always heavily relied on a 301/302 redirect to take users from browsing over HTTP to HTTPS. NginX: add_header Content-Security-Policy "default-src https: data: 'unsafe-inline' 'unsafe-eval'" always Īpache: Header always set Content-Security-Policy "default-src https: data: 'unsafe-inline' 'unsafe-eval'"įor Windows Servers open up the IIS Manager, select the site you want to add the header to and select 'HTTP Response Headers'.Ĭlick the add button in the 'Actions' pane and then input the details for the header.ĬSP has a huge number of features that I've outlined in the blog mentioned above and you can also use my CSP Analyser and CSP Builder over on report-uri.io to help you create a tailored policy for your site. Here is a basic policy to enforce TLS on all assets and prevent mixed content warnings. I have covered CSP in a lot more detail in my blog Content Security Policy - An Introduction. By restricting the assets that a browser can load for your site, like js and css, CSP can act as an effective countermeasure to XSS attacks. ![]() The CSP header allows you to define a whitelist of approved sources of content for your site. Once you have setup each header, check it using SecurityHeaders.io. They can be used to deliver security policies, set configuration options and disable features of the browser you don't want enabled for your site. Outlined below, these headers give the browser more information about how you want it to behave with regards to your site. The first step in hardening your HTTP response headers is looking at the additional headers you can utilise to make your site more secure. Let's take a look at some more security based headers. By passing security policies back to the client in this fashion, hosts can ensure a much safer browsing experience for their visitors and also reduce the risk for everyone involved. Increasingly, HTTP Response headers have been used to transmit security policies to the browser. They are typically used to transfer technical information like how a browser should cache content, what type of content it is, the software running on the server and much, much more. HTTP Response headers are name-value pairs of strings sent back from a server with the content you requested. Once the handlers at the applicationHost is unlocked, your website should run fine.Following the recent announcement of my new service,, I thought I'd cover some more of the security based HTTP response headers out there and look at how to harden your existing HTTP response headers. On the right most pane, you will find "Unlock Section" under "Section" heading. On the right side, there is another drop down. ![]() Choose "system.webServer/handlers" from the drop down. In the window that opens, on top you will find a drop down for sections. In the connections tree(in IIS), go to your server node and then to your website.įor the website, in the right window you will see configuration editor under Management.ĭouble click on the configuration editor. One more highly rated approach is to follow the below steps to unlock the handlers at the parent level: In the features window, Click: "Internet Information Services".Ĭlick: "Application Development Features".Īfter the above steps are successfully completed, restart IIS and try to load the project again. In the search box, enter "Turn windows features on or off". To deal with the specified error, we recommend first to check if the proper Windows features for IIS are enabled: The observed issue is usually just the effect of inability to read the file due to a lack of authorization. The error message is saying that there is no access to the config file. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false". This happens when the section is locked at a parent level. This article resolves a problem in which you receive the following error message:Ĭonfig error This configuration section cannot be used at this path. Download free 30-day trial HTTP Error 500.19 Config error: This configuration section cannot be used at this path Description ![]()
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