Bug 269362

Company proxy settings are set and most things are working fine. However, when I try to update my IDE or add a new Plugin via Tools -> Plugins, the UI displays no results. In my messages.log I see some errors related to not being able to process the GZIP'd catalog.xml.gz or updates.xml.

The files here (D:\Users\<USERID>\AppData\Local\NetBeans\Cache\8.2\catalogcache) are where I found the actual responses. These files show the HTML of our company's Websense block page. So I logged into our Websense servers to view the real time logs and see a difference between when I hit the URL (http://plugins.netbeans.org/nbpluginportal/updates/8.2/catalog.xml.gz) from my browser and when the IDE tries to make the same request.

When attempting from my browser, I have no issues retrieving the file:
<WORKSTATION_IP> - <USER_ID> [15/Dec/2016:10:55:09 -0500] "GET <URL_HERE>" 200 57999 200 57999 0 0 4220 298 703 224 0
* There is a username captured in the logs

And when the IDE tries, I see a slightly different request:
<WORKSTATION_IP> - - [15/Dec/2016:10:55:09 -0500] "GET <URL_HERE>" 200 57999 200 57999 0 0 4220 298 703 224 0
* The same field is empty from the IDE request

From the results, it looks as though when executed its not actually running as the logged in user on the workstation. Since this URL is in our companies AUTH list you must be logged in to get to this URL. When the request comes from a workstation, instead of a user (like the second request), then the request gets blocked.