The Centrastor service has recently been hardened against the so-called "POODLE" security attack. This has involved deprecating the use of SSL in favour of TLS as a cryptographic protocol. The impact of the change has meant that the Windows 7 native WebDAV client will not connect to a Centrastor virtual portal by default because of its explicit use of SSL.
A workaround is available as described below until such times as Microsoft make an official fix available.
- Download the 'IISCrypto40.exe' utility from 'https://www.nartac.com/Products/IISCrypto/'
- Start the utility
- Click on the "Best Practices" button
- Ensure all references to SSL protocols are deselect in the "Protocols Enabled" menu
- Click on the "Apply" button
- Restart the computer
- Re-try the WebDAV connection
The utility alters Windows regisitry settings, notably HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Cryptography\Configuration\SSL\00010002\Functions which contains a list of cipher suites. This registry setting could be changed manually using the appropriate cipher list as an alternative. For example, having edited one computer via the utility the registry information would then be available as a source for updating other computers via this method.