Disable network connection

Question

How could I temporarily disable a network connection in Java?

Answer 1

A fairly complicated but feasible way to do this is to create a custom socket implementation factory. You can register it by calling Socket.setSocketImplFactory().

Your custom factory will then have to return custom socket implementations that simply throw an IOException at every connection attempt.

Note that this only stops outgoing connections, if you want to stop your application accepting incoming connections as well, you'll have to play a similar trick on ServerSockets.

Answer 2

Would these work? On windows:

Runtime.getRuntime ().exec ("ipconfig/release");

On linux ( assuming the network interface is called eth0:

 Runtime.getRuntime ().exec ("ifconfig eth0 down");