Do unsigned apps work through a proxy?
The oracle speaks: Unsigned apps work fine thru a proxy. The sandbox permissions only allows opening a socket connection to the download host, but this does not mean that the underlying implementation in sun.net.protocol cannot use a proxy. We use proxys all the time (since we’re behind a firewall) but we can access any unsigned app or application on the Net. Note, however, that cookie style web page authentication or NTLM authentication doesn’t work. Java 1.4.2 Update. NTML authentication support is forthcoming Java 1.4.2 (=Mantis), see Bug #4626557.
