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POProviding internet access to my self hosted web api on an internal network. A security threat?
 

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  1. POProviding internet access to my self hosted web api on an internal network. A security threat?
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    <p>Firstly, I'm relatively new to Web API / CORS and security implementation.</p> <p>This question is specifically with regards to security. The Web API houses extremely sensitive data and provides clients with the ability to execute transactions online.</p> <p>The context :</p> <ul> <li>I have a Web API self hosted as a windows service with a fixed port.</li> <li>The Web API is sitting behind a firewall / DMZ on an internal network.</li> <li>The Web API (using CORS) only allows traffic from the external server.</li> <li>The external server hosts our web site using IIS.</li> <li>The Web API is making use of Token authentication (bound to client IP to avoid hi-jacking).</li> <li>Both the external website and internal Web API force the use of SSL.</li> </ul> <p>The problem :</p> <p>The web page makes ajax calls via javascript to the Web API. However, the Web API is not directly exposed to the internet.</p> <ul> <li>What would the security impact be on having the below setup?</li> <li>What sort of vulnerabilities would I be exposing my network too by doing so.</li> <li>Is there a better way of implementing such a setup!?</li> </ul> <p>Eg</p> <ul> <li><p>User enters <code>https://test.mydomain.com</code> into the browser and is served a page.</p></li> <li><p>ajax call gets made to <code>https://test.mydomain.com/api/test/action</code></p></li> <li><p>external server routes <code>https://test.mydomain.com/api</code> messages to internal server <code>https://myInternalWebAPI/api/test/action</code> which is not exposed to the public.</p></li> </ul>
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    1. PTQuestion
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    1. USDwayne Hinterlang
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      1. POProviding internet access to my self hosted web api on an internal network. A security threat?
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      1. VTUpMod
    1. COThis is a great article (IMO) about securing public REST webservices: http://www.thebuzzmedia.com/designing-a-secure-rest-api-without-oauth-authentication/
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      1. POProviding internet access to my self hosted web api on an internal network. A security threat?
      1. USEkoostikMartin
    2. CO@EkoostikMartin Thanks for this link, however, I'm already using 95% of these practices in my design. My question is really whether the network administrator would be comfortable forwarding the already protected ajax traffic to the internal webapi
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      1. POProviding internet access to my self hosted web api on an internal network. A security threat?
      1. USDwayne Hinterlang
    3. COYou are actually going overboard (though this isn't a bad thing I guess). Web Servers in the DMZ need to communicate with application servers outside the DMZ, this is unavoidable outside of the most simple systems. This is normally not for a software architect to worry about, but the network/security admin. For example, not sure why you need HTTPS on internal server if you are using token based authentication based on IP address.
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      1. POProviding internet access to my self hosted web api on an internal network. A security threat?
      1. USEkoostikMartin
 

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