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NETSH is one of the most powerful tools in the Windows networking toolkit. This list will introduce you to some good uses of NETSH in various scenarios and show you how you can streamline your networking configuration, administration, and documentation.
#1: What is NETSH?
NETSH is one of the most powerful yet least known networking tools included with Windows 2000 and Windows Server 2003. It's installed by default and is located in the %systemroot%system32 folder. NETSH is also available on Windows XP.
I also found the helper dll list (when I used netsh show helper command) aren't the same when I launch cmd.exe individually. I've tried to run netsh add helper wlancfg.dll but it doesn't work. I used to do the same thing on Windows 7, Windows 8, and Windows 8.1. All of it worked like a charm, however it doesn't work on Windows 10. However, most of these can still be accessed via the command-line interface (CLI), which is where the Netsh WLAN commands come into play. Managing Wireless Networks. Starting with Windows 8, Microsoft removed the Manage Wireless Networks option in the Network and Sharing Center.
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NETSH enables you to display, modify, import, and export many aspects of the network parameters of a system. It can also connect remotely to other systems with a remote machine parameter (-r).
#2: Contexts for NETSH
Contexts are specific dimensions of the network configuration that can be managed by NETSH. The commands and options within NETSH are context sensitive, and the same command may exist in multiple context areas but have different commands and results in each context. Here are the Windows Server 2003 NETSH context areas:
Now, to add to the confusion, a context can have a subcontext. For example, the interface context has three subcontexts, ip, ipv6, and portproxy. NETSH refers to these subcontexts as a context, such as the netsh interface ip context. Note that Windows XP has a different set of contexts. When using the import and export operations in noninteractive mode, you must specify context or subcontext configuration.
#3: Coordinating network change control with NETSH
You can use NETSH to export and import network configurations. A good example of using NETSH with networking change control would be when a system is going to be placed on a different network, but the communication channels need to be maintained to various other systems. A NETSH export will allow all parties to agree on various network settings. For example, Listing A shows a portion of a NETSH export of the interface context from a dump operation.
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Reviewing a NETSH export with all parties involved can ensure that the system will be routed correctly, using the correct DNS, WINS, and subnet mask. The best part is that you can then import the entire file into the Windows system after all appropriate entries have been made without any chance of entering the information incorrectly. And this is only for the interface context. The same applies for all other context scripts.
#4: Using NETSH to dynamically change TCP/IP addresses
You can use NETSH to make dynamic IP address changes from a static IP address to DHCP simply by importing a file. NETSH can also bring in the entire Layer-3 configuration (TCP/IP Address, DNS settings, WINS settings, IP aliases, etc.). This can be handy when you're working on networks without DHCP and have a mobile computer that connects to multiple networks, some of which have DHCP. NETSH shortcuts will far exceed the capabilities of using Windows Automatic Public IP Addressing. Here is an example of running a dynamic update of an IP address:
In this example, filename.netsh is the NETSH file that contains an interface dump configuration. You can make shortcuts in Windows to a .BAT file that will run that command so you can easily add shortcuts to get a DHCP address and switch to a static IP address for a customer site, DMZ network, or any other static IP network.
#5: Best practice: Using a .NETSH extension
NETSH import and export operations are in a native plain text format and can be read and edited from any text tool. However, NETSH files should be handled as a special file type because they're used to document network configurations, as well as for the import and export process. A best practice would be to make all export operations refer to a FILE.NETSH, where this file is what has been exported from NETSH. This is especially important because a NETSH export file doesn't contain the word NETSH in it. This way, even a novice can figure out what the file contains.
The file extension from export (dump) and import (-f) operations are entirely user specified. For convenience, you can associate the .NETSH extension with your Windows installation to allow native double-click editing.
#6: NETSH in interactive mode
NETSH is one of the Windows tools that can be run in either an interactive or a noninteractive environment. Interactive tools (such as nslookup and dnscmd) have effectively different usage scenarios depending on the mode chosen.
Interactive mode also has two submodes, online and offline. Online mode is a direct interaction with the networking components while in interactive mode. Offline mode lets you interactively make changes and then roll them all online instantly by going to online mode.
#7: NETSH in noninteractive mode
In noninteractive mode, you can implement NETSH commands by importing a file. Using noninteractive mode is recommended for file import and export operations. With NETSH in noninteractive mode, you can export key settings from each context as a specific aspect of your system documentation. In addition, if an issue arises and you can trace it back to a specific networking topic for which you have a NETSH script exported from a known working time, you can re-import that NETSH script in noninteractive mode and restore your networking functionality to that point. Please note that NETSH does not back up data within the contexts, such as the WINS database.
#8: Clarifying the scripts
When exchanging NETSH scripts, you can insert comments to solicit feedback. This will allow you to explain an entry or use it as a training tool for others. Simply insert REM in a NETSH exported file to add a comment. Don't put in too many comments, however; just what is necessary.
#9: NETSH precautions
NETSH is a powerful tool and should be used with caution. Using interactive online mode (the default) for changes on the fly can be more risky than implementing a change in interactive offline mode and going online to commit the changes. However, using noninteractive mode to perform changes is popular as well because the changes can be scripted. Try your hand at NETSH on a virtual machine or test system first.
#10: Navigating NETSH
The large array of features available in NETSH may seem overwhelming at first. It's helpful to get into NETSH to see the options available and practice using the interface in interactive mode (a little different for those of us used to noninteractive tools). Getting into NETSH in interactive mode is easy: Simply type NETSH at the command prompt. Then, use these guidelines to investigate the command options:
Netsh Wlan Show All Windows 10
- To change to another context, type the name of the context. For example, typing interface ip will go immediately to the interface ip context from which ever context you are presently located.
- To change your mode, type offline or online. Typing offline will send the interactive session offline, so any changes won't be brought in immediately. Typing online will bring the interactive session online, so changes will immediately be brought into the networking elements of the system.
- Typing show mode will display the current mode (offline or online). The default mode is online, so be sure to immediately jump offline if you are experimenting.
- Typing ? or help will show the available commands for your current context location. If you're in the root of the tool, there is no active context and your interface to the tool will be a netsh> prompt.
- Global commands, such as online and quit, are those you can use everywhere. Context commands are available only in the current context. For example, from the netsh interface ip> context, you can view the network configuration by running show dns, but this command may not work other contexts or subcontexts.
- In contexts, running set and show will provide the context-sensitive command options.