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Using port number in Windows host file


Question

After installing TeamViewer, I have changed the wampserver port to 8080, so the address is http://localhost:8080.

For the host file located at C:\WINDOWS\system32\drivers\etc\, I have also made the change as below

BEFORE
127.0.0.1 www.example.com

AFTER
127.0.0.1:8080 www.example.com

When I access www.example.com, it doesn't redirect to my wampserver, how can I fix it?

2019/08/20
1
191
8/20/2019 3:11:21 PM

Accepted Answer

The hosts file is for host name resolution only (on Windows as well as on Unix-like systems). You cannot put port numbers in there, and there is no way to do what you want with generic OS-level configuration - the browser is what selects the port to choose.

So use bookmarks or something like that.
(Some firewall/routing software might allow outbound port redirection, but that doesn't really sound like an appealing option for this.)

2011/12/28
195
12/28/2011 7:15:14 AM


I managed to achieve this by using Windows included Networking tool netsh.

As Mat points out : The hosts file is for host name resolution only, so a combination of the two did the trick for me.

Example


Overview

example.app:80
 |                           <--Link by Hosts File
 +--> 127.65.43.21:80
       |                     <--Link by netsh Utility
       +--> localhost:8081

Actions

  • Started my server on localhost:8081
  • Added my "local DNS" in the hosts file as a new line
    • 127.65.43.21 example.app
      • Any free address in the network 127.0.0.0/8 (127.x.x.x) can be used.
      • Note: I am assuming 127.65.43.21:80 is not occupied by another service.
      • You can check with netstat -a -n -p TCP | grep "LISTENING"
  • added the following network configuration with netsh command utility
    • netsh interface portproxy add v4tov4 listenport=80 listenaddress=127.65.43.21 connectport=8081 connectaddress=127.0.0.1
  • I can now access the server at http://example.app

Notes:
- These commands/file modifications need to be executed with Admin rights

- netsh portproxy needs ipv6 libraries even only to use v4tov4, typically they will also be included by default, otherwise install them using the following command: netsh interface ipv6 install


You can see the entry you have added with the command:

netsh interface portproxy show v4tov4

You can remove the entry with the following command:

netsh interface portproxy delete v4tov4 listenport=80 listenaddress=127.65.43.21


2018/11/26

Fiddler2 -> Rules -> Custom Rules

then find function OnBeforeRequest on put in the next script at the end:

if (oSession.HostnameIs("mysite.com")){
    oSession.host="localhost:39901";
}
2015/06/13

The simplest way is using Ergo as your reverse proxy: https://github.com/cristianoliveira/ergo

You set your services and its IP:PORT and ergo routes it for you :).

You can achieve the same using nginx or apache but you will need to configure them.

2017/10/25

If what is happening is that you have another server running on localhost and you want to give this new server a different local hostname like http://teamviewer/

I think that what you are actually looking for is Virtual Hosts functionality. I use Apache so I do not know how other web daemons support this. Maybe it is called Alias. Here is the Apache documentation:

Apache Virtual Hosts examples

2015/07/29

-You can use any free address in the network 127.0.0.0/8 , in my case needed this for python flask and this is what I have done : add this line in the hosts file (you can find it is windows under : C:\Windows\System32\drivers\etc ) :

127.0.0.5 flask.dev
  • Make sure the port is the default port "80" in my case this is what in the python flask: app.run("127.0.0.5","80")

  • now run your code and browse flask.dev

2017/08/16

Source: https://stackoverflow.com/questions/8652948
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