If you are using a proxy between Workbench and the LiveCycle ES Server, you may want to limit the connection to provide a higher level of security. For the standard installation Workbench communcates with the LiveCycle server over HTTP with servername and port number as follows:
Using a proxy server, you could limit the connection further to just two URLs:
This is subject to change, especially in later versions and must be tested thoroughly to ensure there are no conflicts or unexpected problems. Adobe will investigate issues related to such a configuration but in some cases the only solution may be to return to the default settings, without limiting the connection to specific URLs.