If you use a proxy with Basic authentication (clear-text password), you will run into problems connecting to our services when you use a Java 8.0_111 or later.


There were changes made in Java 8 Update 111, where Basic proxy authentication was disabled by default:


https://stackoverflow.com/questions/41505219/unable-to-tunnel-through-proxy-proxy-returns-http-1-1-407-via-https


As the post suggest, you can enable it using a Java VM property. In DbVisualizer, open Tools->Tool Properties and select the General category. Add these lines to the Java VM Properties area:


-Djdk.http.auth.tunneling.disabledSchemes=

-Djdk.http.auth.proxying.disabledSchemes=


Then click OK and restart DbVisualizer.