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Forums Using DNN Platform Administration and Configuration

Stopping hot linking

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Gothic Wizard
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Posts: 25
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12/3/2022 2:39 AM

If I put the following in my web.config, this will stop people hot linking any images on my site? Clearly I'd edit the domains to reflect my addy. Thanks for any help.




 
 
 
   
   
   
 
 



Will Strohl
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12/3/2022 2:48 PM

I haven't personally tried the method you're attempting, but I'd recommend a slightly different approach, if you're open to it...  

If you're using a WAF to protect your website, you should be able to easily enable this as a setting.  In Cloudflare, you can do this with their free plan.  (See below.)  The other benefit is that you get another layer of protection and a CDN that both help your website perform better for all visitors.  :)  

Gothic Wizard
New Around Here
Posts: 25
New Around Here
12/4/2022 2:36 AM
I am using Mochahost as my host. I do not see a hot linking block on their control panel why I was looking for a more direct fix. I tried that code in my config file and sadly it did not work. Not sure why.
Justin C
Growing Member
Posts: 55
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12/4/2022 10:52 AM
Do you have forced https on the site? If so (which you should btw), the rule is only looking for http. See this article for rewrite rules which will work:

https://www.rewriteguide....nt-image-hotlinking/
Mariette Knap
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Posts: 0
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12/4/2022 1:57 PM

Hello,

I agree with Will that the solution Cloudflare offers (free) works very good but if you really want to do it your self use this:

<code><rewrite> <rules> <rule enabled="true" name="Block Hotlinking" stopprocessing="true"> <match url="(?:jpg|jpeg|png|gif|bmp)$"> <conditions logicalgrouping="MatchAll" trackallcaptures="false"> <add input="{HTTP_REFERER}" pattern="^https?://(.+?)/.*$"> <add input="{DomainsAllowList:{C:1}}" pattern="^block$"> <add input="{REQUEST_FILENAME}" negate="true" pattern="no-hotlink.png"> <add input="{REQUEST_URI}" negate="true" pattern=".*(hotlink-ok).*"> </add></add></add></add></conditions> <action appendquerystring="false" redirecttype="Temporary" type="Redirect" url="https://yourdomain.com/images/no-hotlink.png"> </action></match></rule> </rules> <rewritemaps> <rewritemap defaultvalue="block" name="DomainsAllowList"> <add key="www.server-essentials.com" value="allow"> <add key="www.bing.com" value="allow"> <add key="www.google.com" value="allow"> <add key="www.google.ch" value="allow"> </add></add></add></add></rewritemap> </rewritemaps> </rewrite></code>

Mariette Knap
New Around Here
Posts: 0
New Around Here
12/4/2022 1:57 PM

Hello,

I agree with Will that the solution Cloudflare offers (free) works very good but if you really want to do it your self use this:

 
     
       
         
         
           
           
           
           
         
         
       
     
     
       
         
         
         
         
       
     
   

<code><rewrite> <rules> <rule enabled="true" name="Block Hotlinking" stopprocessing="true"> <match url="(?:jpg|jpeg|png|gif|bmp)$"> <conditions logicalgrouping="MatchAll" trackallcaptures="false"> <add input="{HTTP_REFERER}" pattern="^https?://(.+?)/.*$"> <add input="{DomainsAllowList:{C:1}}" pattern="^block$"> <add input="{REQUEST_FILENAME}" negate="true" pattern="no-hotlink.png"> <add input="{REQUEST_URI}" negate="true" pattern=".*(hotlink-ok).*"> </add></add></add></add></conditions> <action appendquerystring="false" redirecttype="Temporary" type="Redirect" url="https://yourdomain.com/images/no-hotlink.png"> </action></match></rule> </rules> <rewritemaps> <rewritemap defaultvalue="block" name="DomainsAllowList"> <add key="www.server-essentials.com" value="allow"> <add key="www.bing.com" value="allow"> <add key="www.google.com" value="allow"> <add key="www.google.ch" value="allow"> </add></add></add></add></rewritemap> </rewritemaps> </rewrite></code>

Mariette Knap
New Around Here
Posts: 0
New Around Here
12/4/2022 2:04 PM

In addition to the above you can put rewriterules, outboundrules and rewritemaps in seperate files like:

        
            
       

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