How to check what is on port 80

This port is used for standard internet communication. After completing port forwarding, go to www. There are several ways to find which running process is using a port.

Using fuser it will give the PID s of the multiple instances associated with the listening port. After finding out, you can either stop or kill the process es. Replace echo by sudo for the process to actually be killed. Viewed k times. Improve this question. Roman Roman 2, 9 9 gold badges 30 30 silver badges 32 32 bronze badges.

If the first case says "Forbidden" your root directory or virtual host is not set up correctly. Assuming you are behind a router, have you setup port-forwarding on the router? Your router most probably uses port 80 already for it's own web-based admin interface. In any case, you need to forward requests to your public IP address the router to the local IP address of your computer, at port 80 or whatever.

Add a comment. Active Oldest Votes. If you are just spot checking your ports from the outside. Improve this answer. Urda Urda 4 4 silver badges 16 16 bronze badges.

I checked my ports with the yougetsignal. This site writes that my port 80 is opened while 79 and 81 are closed. Did you check your Windows 7 Firewall exceptions? It would explain why you can reach it via localhost and not from other computers. Urda, I have opened the port 80 in this way maximumpcguides.

So, it should be opened for all IPs. Moreover, site that you give me says that port 80 is open. If the first case says "Forbidden" your root directory or virtual host is not set up correctly in most cases. You get a link broken because 81 isn't resolving. Kirk it's a great website after all!

Show 4 more comments. Greg Bray Greg Bray 5, 5 5 gold badges 31 31 silver badges 50 50 bronze badges. Kyle Brandt Kyle Brandt Piskvor left the building Piskvor left the building 2, 1 1 gold badge 16 16 silver badges 17 17 bronze badges.

Jared Jared 1, 2 2 gold badges 16 16 silver badges 22 22 bronze badges. Now Start IIS. Anash's Knowledge Base. Search this site. Navigation Home. Plan du site. Contents 1 Overview 2 Symptoms 3 Resolution 3. Listen 80 b. ServerName localhost Listen b. Navigation Home Plan du site. Oommen Contents 1 Overview 2 Symptoms 3 Resolution 3. Figure 1 — Apache cannot run on port 80 The reason for this error is that some other application is already using port Viewed 14k times.

The request hostname is invalid. Update2 We found out which application was using the port afterall see my answer. Improve this question. Community Bot 1. Laf Laf 2 2 gold badges 2 2 silver badges 12 12 bronze badges. What makes you think you actually have something listening on port 80? DavidPostill see my update. Drop the findstr. The process ID is 4, which corresponds to System. If I try to drop the findstr call, the process name is Can not obtain ownership information.

Does netsh http show servicestate show anything interesting? Show 1 more comment. Active Oldest Votes. Improve this answer.

You sir, made my day. The latest Windows update enabled this and broke my Apache all morning. I love you so much. Add a comment. Steven Steven 4 4 silver badges 16 16 bronze badges.