What is NETSH ?

Netsh is a command-line scripting utility that allows you to, either locally or remotely, display, modify or script the network configuration of a computer that is currently running. The following examples based on XP SP2

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How to check the connection and opened port

netsh -c diag
netsh diag>connect iphost chicagotech.net 80
Result:
IPHost (chicagotech.net)
IPHost = chicagotech.net
Port = 80
Server appears to be running on port(s) [80]

How to configure the TCP/IP protocol

The following command configures the interface named chicagotechnet with the static IP address 10.0.5.99, the subnet mask of 255.255.255.0, and a default gateway of 10.0.5.1:

set address name="chicagotechnet" source=static addr=10.0.5.99 mask=255.255.255.0 gateway=10.0.5.1 

How to configure Wireless using netsh

To configure an defined wireless network, use this command: netsh wlan connect ssid=”mySSID” name=”WLAN-Profil1”
To show your current wireless settings, use this command: netsh wlan show settings
To add an already exported wireless network profile, use this command: netsh wlan add profile filename="Wireless Network Connection-BOW.xml"

How to export and import network configuration to a file

With netsh, you can export and import your computer network configuration easy. To export your configuration, just do:

netsh –c interface dump > test.txt

When you  import this configuration, use this command

netsh –f test.txt

How to use netsh commands for remote access (ras)

You can administer remote access servers by typing netsh and then ras. Following are some commands manage RAS:

•        show activeservers

•        show client

•        dump

•        show tracing

•        set tracing

•        show authmode

•        set authmode

•        add authtype

•        delete authtype

•        show authtype

•        add link

•        delete link

•        show link

•        add multilink

•        delete multilink

•        show multilink

•        add registeredserver

•        delete registeredserver

•        show registeredserver

•        show user

•        set user

•        Netsh ras diagnostics context commands

•        Netsh ras IP context commands

•        Netsh ras AppleTalk context commands

•        Netsh ras AAAA context commands

How to open port 8080 using netsh

1) netsh -c firewall
2) set portopening tcp 8080

How to run netsh

To run a netsh command, you can start netsh from the Cmd.exe prompt and change to the context that contains the command you want to use. Or you can do netsh -c option. If the contexts that are not available to you, you may receive an error message. For example, if you type netsh -c firewall at the Netsh command prompt, you change to the firewall context, but if you do not have firewall installed the following message appears:

The following command was not found: firewall.

How to run Netsh with a script

If you need to run netsh with many configurations, you can create a script for each configuration and then run it using this command: netsh –f <scriptfile>

How to use netsh to configure remote computer

You can configure remote computer uisng netsh with options “-r” for the machine, “-u” for the username, and “-p” for the password, for example: netsh -r cbg001314 -u cbg001314\blin -p password lan show config.

How to switch between static ip and DHCP

To switch the specified adapter from a static address to DHCP, type the following command:
netsh interface ip set address "chicagotechnet" dhcp

To change to a static address, type the following command:
netsh interface ip set address "chicagotechnet" static ipaddr subnetmask gateway metric.

How to reset IP protocol using netsh

For troubleshooting TCP/IP issue, you may need to reset the TCP/IP protocol stack configurations on your interface. To do that, use this command: netsh int ipv4 reset resetlog.txt

source: chicagotech - what is Netsh