We have two NetScaler Appliance in version 10.5 build 59.11 and we are trying to configure AppFW Signature for auto updates from a internal url. The SignaturesMapping.xml and Signature file are published on a internal Microsoft IIS Server but every time we check the URL we receive an error "Error in accessing the URL!".

If we try to add new native signature from URL, that works, but we need to update all existing signatures.

The javascript in the browser were not able to read content from another server – this is the same origin policy coming into effect here. You will need to set a CORS policy on the server allowing other sites to access the data. We will need to do this for other servers as well where our signatures are hosted.

Here is what you can do for IIS 7 - http://enable-cors.org/server_iis7.html.

Problem Cause

Client Browser Java Script was not able to read content from another server due to missing CORS policy on server