Why does IntelliJ want to accept incoming network connections?

Question

➠ What feature in IntelliJ is acting as a server to accept incoming connections?

When first running IntelliJ 2017.1.1 I get a dialog box asking permission for incomin

Answer 1

Problably it is linked to the below.

If you click on http://localhost:63342/ you should be able to access the built-in server. Which by default should listen only on the local interface.

Open port in range 6942-6992 seems to be linked to SocketLock.java

myServer = BuiltInServer.startNioOrOio(workerCount, 6942, 50, false, handler);

note: Ports 6953, 6969, 6970 are excluded from that range. See BuiltInServer.java

private static final int[] FORBIDDEN_PORTS = {6953, 6969, 6970};

Another open port is linked to a process org.jetbrains.idea.maven.server.RemoteMavenServer

jps -l | grep jetbrains
24628 org.jetbrains.idea.maven.server.RemoteMavenServer

You could find out open port with netstat

on Linux: `netstat -ltupne`
on OSX (something like): nettop -np java

and the related java processes with jps (as show above)