There are many services, which can listen port 80 on windows. Luckily you can detect and stop them all running simple console command: NET stop HTTP When you’ll start it, you will get list first: To avoid this problem in future go to Local Services and disable listed services. N.B. – Some services will restart … Read more
TCP’s primary design goal is to allow reliable data communication in the face of packet loss, packet reordering, and — key, here — packet duplication. It’s fairly obvious how a TCP/IP network stack deals with all this while the connection is up, but there’s an edge case that happens just after the connection closes. What … Read more
SMTP protocol: smtps (port 465) v. msa (port 587) Ports 465 and 587 are intended for email client to email server communication – sending out email using SMTP protocol. Port 465 is for smtps SSL encryption is started automatically before any SMTP level communication. Port 587 is for msa It is almost like standard SMTP … Read more
I’m also interested in this problem. As @Thasmo mentioned, port forwardings can be specified ONLY with docker run (and docker create) command. Other commands, docker start does not have -p option and docker port only displays current forwardings. To add port forwardings, I always follow these steps, stop running container docker stop test01 commit the … Read more
This is the implementation coming from the Apache camel project: /** * Checks to see if a specific port is available. * * @param port the port to check for availability */ public static boolean available(int port) { if (port < MIN_PORT_NUMBER || port > MAX_PORT_NUMBER) { throw new IllegalArgumentException(“Invalid start port: ” + port); … Read more
You can access your host machine with the IP address “10.0.2.2“. This has been designed in this way by the Android team. So your webserver can perfectly run at localhost and from your Android app you can access it via “http://10.0.2.2:<hostport>“. If your emulator must access the internet through a proxy server, you can configure … Read more
First off, a “port” is just a number. All a “connection to a port” really represents is a packet which has that number specified in its “destination port” header field. Now, there are two answers to your question, one for stateful protocols and one for stateless protocols. For a stateless protocol (ie UDP), there is … Read more
const full = location.protocol + ‘//’ + location.host;
This fuser 8080/tcp will print you PID of process bound on that port. And this fuser -k 8080/tcp will kill that process. Works on Linux only. More universal is use of lsof -i4 (or 6 for IPv6).
A single listening port can accept more than one connection simultaneously. There is a ’64K’ limit that is often cited, but that is per client per server port, and needs clarifying. Each TCP/IP packet has basically four fields for addressing. These are: source_ip source_port destination_ip destination_port <—– client ——> <——— server ————> Inside the TCP … Read more