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Free Image Format Conversion`netstat` is a command-line tool that displays active network connections, routing tables, and other network interface information. It can be used to troubleshoot issues on a computer or server or identify security threats. In this article, we will discuss the uses of `netstat`, how to run the `netstat` command, and the meaning of its output.
What is the "netstat" command used for? The "netstat" (network statistics) command is a command-line tool that displays network connections, routing tables, network interface statistics, and more. It aids users in checking the status of network connections, identifying open ports, monitoring network activity, diagnosing network issues, and examining network interface configurations. With various options, "netstat" can show information such as active TCP connections, listening ports, IPv4 or IPv6 statistics, and more.
"Netstat" stands for "network statistics." If you're having trouble accessing the internet, the netstat command can help you identify the problem. Netstat displays all of the active network connections on your computer and their status. If a connection isn't working, netstat can usually provide more information about why it's not working.
Netstat can also be used to monitor your computer for security threats. By default, netstat will not show you listening ports, so you'll need to use the -l option to view them. If you see any unusual or unfamiliar listening ports, it's possible that someone is attempting to access your system without permission.
How do I run the netstat command?
To use "netstat," open a Command Prompt or terminal window and type "netstat" followed by the options you want to use. For example, you can try using "netstat" by following these steps:
1. Click the "Start" menu, type cmd in the search box, and then press Enter to open the Command Prompt.
Step 2: Type netstat at the prompt and press Enter. The netstat command will now display a list of all active network connections.
To see all active connections, type netstat -a. netstat has many other options for customizing its output; type netstat /? at the command prompt to see the complete list.
To stop the netstat output, simply press Control + C to exit.
What do the results of the netstat command mean?
The `netstat` command displays active network connections and provides information about them, including their status, the network protocol used, the IP addresses of the local and remote computers, and more.
- Proto - The network protocol, which can be something like TCP or UDP.
- Local Address - The IP address of the local computer and the port number being used. Unless the -n switch is used, it displays the hostname and port associated with the IP address. If the port has not been assigned, an asterisk (*) indicates this.
- Foreign Address - The IP address of the remote computer and the port to which the socket is connected. Unless the -n switch is used, it shows the name associated with the IP address and port. If the port has not been assigned, an asterisk (*) will appear in place of the port number.
- State - Displays the state of active TCP connections, which may include:
- CLOSE_WAIT
- CLOSED
- ESTABLISHED
- FIN_WAIT_1
- FIN_WAIT_2
- LAST_ACK
- LISTEN
- SYN_RECEIVED
- SYN_SENT
- TIMED_WAIT
What is the syntax for the netstat command?
Syntax: NETSTAT [-a] [-b] [-e] [-f] [-i] [-n] [-o] [-p Protocol] [-r] [-s] [-t] [-x] [-y] [Interval] [/?]
The syntax of the `netstat` command varies depending on the options and arguments used. You can find a detailed explanation of each option in the table below.
| Parameter | Description |
|---|---|
| -a | Displays all current active TCP connections and the ports on which the computer is listening. |
| -b | Displays the program that created each connection or listening port. In some cases, well-known executables contain several independent components. In this case, the sequence of elements involved in creating the connection or listening port is displayed. |
| -e | Displays information about all Ethernet adapters on the computer. This parameter can be used with the -s parameter. |
| -n | Displays active network connections and their status without resolving hostnames or port names. |
| -o | Displays active network connections and their status, and the process ID for each connection. This parameter can be used with the -a, -n, and -p parameters. |
| -p Protocol | Displays all active connections for the specified protocol. These protocols can be TCP, UDP, ICMP, and IP. |
| -s | Displays statistics for the currently used protocols. |
| -r | Displays the computer's routing table. This is the same as using the route print command. |
| Interval | Displays active network connections and their status at the specified interval. You can stop it by pressing CTRL+C. |
| /? | Displays help at the command prompt. |
Finally
The `netstat` command is a powerful networking tool that provides you with a wealth of information about your computer's network connections. By understanding the different options and switches available with `netstat`, as well as the meanings behind its output, you can use this command to diagnose networking issues and more. Don't be afraid to experiment with `netstat`; it's an excellent way to understand how your computer communicates on the network. Have fun exploring all the capabilities this command has to offer! Enjoy your journey of discovery!