A simple but relatively insecure way would be to use the –net=host option to docker run. This option makes it so that the container uses the networking stack of the host. Then you can connect to services running on the host simply by using “localhost” as the hostname. This is easier to configure because you … Read more
Is it also possible to access the management port in a similar way, e.g.: @SpringBootTest(classes = {Application.class}, webEnvironment = WebEnvironment.RANDOM_PORT) public class MyTest { @LocalServerPort int randomServerPort; @LocalManagementPort int randomManagementPort;
True. But it also means that anyone talking to you knows that you must have to root privileges to run that server. When you log in to a server on port 22 (say), you know you’re talking to a process that was run by root (security problems aside), so you trust it with your password … Read more
Play 2.x In Play 2, these are implemented with an sbt plugin, so the following instructions are really just sbt tasks. You can use any sbt runner (e In Play 2, these are implemented with an sbt plugin, so the following are really just sbt tasks. You can use any sbt runner (e.g. sbt, play, … Read more
1- Stop other applications that are using port 80. 2- run application with port 80 : if __name__ == ‘__main__’: app.run(host=”0.0.0.0″, port=80)
I think you can configure that in you server.xml file and put 2 services : <Service name=”app1″> <Connector port=”8081″ protocol=”org.apache.coyote.http11.Http11NioProtocol” connectionTimeout=”20000″ redirectPort=”8443″ /> <Engine name=”Catalina” defaultHost=”localhost”> <Host name=”localhost” appBase=”app1″ unpackWARs=”true” autoDeploy=”true”> </Host> </Engine> </Service> <Service name=”app2″> <Connector port=”8082″ protocol=”org.apache.coyote.http11.Http11NioProtocol” connectionTimeout=”20000″ redirectPort=”8443″ /> <Engine name=”Catalina” defaultHost=”localhost”> <Host name=”localhost” appBase=”app2″ unpackWARs=”true” autoDeploy=”true”> </Host> </Engine> </Service>
As pointed by B. Rhodes, nc (netcat) will do the job. A more compact way to use it: nc -z <host> <port> That way nc will only check if the port is open, exiting with 0 on success, 1 on failure. For a quick interactive check (with a 5 seconds timeout): nc -z -v -w5 … Read more
Do not bind to a specific port. Instead, bind to port 0: import socket sock = socket.socket() sock.bind((”, 0)) sock.getsockname()[1] The OS will then pick an available port for you. You can get the port that was chosen using sock.getsockname()[1], and pass it on to the slaves so that they can connect back. sock is … Read more
For every client you need to start separate thread. Example: public class ThreadedEchoServer { static final int PORT = 1978; public static void main(String args[]) { ServerSocket serverSocket = null; Socket socket = null; try { serverSocket = new ServerSocket(PORT); } catch (IOException e) { e.printStackTrace(); } while (true) { try { socket = serverSocket.accept(); … Read more
TCP / HTTP Listening On Ports: How Can Many Users Share the Same Port So, what happens when a server listen for incoming connections on a TCP port? For example, let’s say you have a web-server on port 80. Let’s assume that your computer has the public IP address of 24.14.181.229 and the person that … Read more