Has anyone used the JAVA blacklist file before?

arturski · 17 Jul 2013 at 10:26

I have been trying to figure out how to block specific Java applications (Minecraft) for a while now without success.

We have students PvP on the network and I have been unable to stop the application from running.

I want to stop people from being able to run a specific JAR file or at least prevent all JARs from running in a specific directory i.e. Group Policy Software Restriction however after doing much research there doesn't seem to be a way to do it.

Group Policy Software Restriction - Doesn't support JAR files as executables

Sophos Antivirus - Doesn't support blocking file types

Has anyone come across this or has any suggestions how to tackle this?

I have recently found 1 article on the whole of the Internet about a Java blacklist file (https://nealpoole.com/blog/2013/01/how-hard-is-it-to-blacklist-a-java-applet/) however I have not been successful after testing it out several times. I thought it worked 1 time however when i came back next morning it was active again on the test machine.

Antowns · 17 Jul 2013 at 10:46

Can you not block based on titles? presumably the title of the window will be Minecraft.

arturski · 17 Jul 2013 at 11:06

Antowns said:
Can you not block based on titles? presumably the title of the window will be Minecraft.

unfortunately not. the way java works is virtual, so all JARs are just executed as java.exe and javaw.exe so there are no processes called Minecraft

CliffyG · 17 Jul 2013 at 11:23

Can you not block by folder using Sophos?

Antowns · 17 Jul 2013 at 11:34

arturski said:
unfortunately not. the way java works is virtual, so all JARs are just executed as java.exe and javaw.exe so there are no processes called Minecraft

I'm fairly sure the window title gets set as "Minecraft", though the process is still Java. Working in a school many moons ago we had some kit which listened for words in a particular window and closed it down (whether it be the window title, keywords in a webpage, email ect.

kirbz · 17 Jul 2013 at 11:43

Can you not block the exe file that's needed to run the game?

I blocked google chrome using this method.

Burnsy2023 · 17 Jul 2013 at 11:56

kirbz said:
Can you not block the exe file that's needed to run the game?

I blocked google chrome using this method.

Like has been said, it's not a compiled exe. It's something like Java.exe -minecraft.jar

kirbz · 17 Jul 2013 at 12:09

Oops my bad, I've never played minecraft so know nothing about it.

I just thought it would have been an exe file. Sorry guys

arturski · 17 Jul 2013 at 14:31

gonna give the authentication url a try but my overall goa is to allow this type of activity only in 1 room.

thanks for the info guys. if you have any suggestions please keep em comming