JT Open Toolkit - 188.8.131.52 is available from the GTAC FTP server ( June1, 2017 )
JT Utilities - 184.108.40.206 are also available from this site
JT Open Toolkit and JT Utilities are downloaded from the GTAC ftp server
Select “Download and Upload Files” from the Explore GTAC list. Scroll to “JT Open” in the “Product Filter” and pick the installer for the platform you want to work with.
You do need a WebKey account to access this site and you’ll need your JTTK install key to complete the install.