Java Web Start: Unable to tunnel through proxy since Java 8 Update 111

Question

Some of our customers cannot run our Java Web Start client anymore since Java 8 Update 111. They get:

java.io.IOException: Unable to tunnel through pr

Answer 1

Beside the answer of mbee one can also configure this in the net.properties file of the jre:

C:\Program Files (x86)\Java\jre1.8.0_131\lib\net.properties

Currently last line 100 need to be commented out:

Before:

 #jdk.http.auth.proxying.disabledSchemes=
 jdk.http.auth.tunneling.disabledSchemes=Basic

After:

 #jdk.http.auth.proxying.disabledSchemes=
 #jdk.http.auth.tunneling.disabledSchemes=Basic

Note that both answers need to be repeated after a Java Update, although the Java Auto Update is deactivated with Basic Internet Proxy Authentication.