Question:

What is Error #2048

Answer:

Error #2048 is generally caused if the eBook site is being accessed behind a firewall and it is blocked, it could be that your IT department has not allowed network access to this site.
Please check with your IT administrator about blocking details and get it unblocked.

A crossdomain.xml file is a file that usually sits in the root folder of your webserver.  This file is basically an opt-in to allow access to your data from outside your web domain.

Many web applications require access to data from somewhere different than where the app file originates.  The crossdomain.xml file gives these web apps permission.

Things that may require crossdomain.xml access:

• Flash
• SWF
• Flex
• Adobe pdf reader
• Silverlight

Example of a crossdomain.xml file:
This following example of a crossdomain file basically allows no access, it's the strictest policy.  

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.adobe.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
    <site-control permitted-cross-domain-policies="none"/>
</cross-domain-policy>