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1. What is netstat.exe?

Netstat.exe is a command-line tool that gives you the list of all TCP and UDP connections, network statistics and the IP routing table.

2. Where I can download it?

Netstat is a built-in Windows tool. To run it, click the Start button. Click “Run” and type “cmd” in the run box. A command prompt window will be shown. Type “netstat” in the command window.
Without arguments the program prints established connections on your computer.

3. How to see all connections?

Use “netstat -a” to see all connections, including those in the state different from ESTABLISHED.

4. Who is using a port?

By default, netstat shows what the program is using a port. To show this information you must add the option “-b”. For example:
“netstat –a –b” shows all connections and includes the process name for each connection.

With “-o”, netstat shows only the process PID. The option “-v” allows you to see components used by a program.
These options are available only on Windows XP, 2003 Server and high.

5. How to show network statistics?

Use “-s” parameter to display protocol statistics. You can combine it with option “-p” to specify the protocol. For example:
“netstat -s -p IP” prints IP protocol statistics.
The command “netstat -e” shows your interface statistics. It shows how many bytes sent or received by your computer.

6. How to view IP routes on my computer?

“netstat -r” command shows the list of network interfaces and the IP routing table. You may use “route print” also.

7. Can it work faster?

Sometime netstat prints connections very slowly, because the program tries to determine hostname of each remote IP address. For quick view, use “netstat -n” command. This command shows all addresses and ports as numbers.

8. How to filter the information?

You can filter netstat output with command “findstr”. For example:
“netstat –a –n | findstr :80” prints all connections with port 80.

9. How to save netstat output?

Yes, you can save the information to file with option “> [path]”:
“netstat –a –n > C:\log.txt”

10. Can the program show connections every 10 seconds?

The program redisplays the information each specified interval (in seconds):
“netstat –n –p TCP 10” shows TCP connections every 10 seconds.
Press CTRL+C to stop redisplaying the information.

NetStat Agent is the replacement of netstat.exe command line tool, but in more handy and easy-to-use graphical interface. It has a lot of powerful features.

Today is the birthday of NetStat Agent. The first public version was released 4 years ago in Jule 12.

So in this happiness day we want to present the discount coupon for everyone who read this blog. 20% discount is available till September 1, 2008. The discount coupon is: BIRTHDAY

The first version of NetStat Agent was released in Jule, 2004.
In version 1.0 netstat, ipconfig, ping and tracert tools was implemented. The program could show the IP routing table and the ARP cache.

In November, some new features like shortcuts customization and ability to show or hide the main toolbar was added.

Since NetStat Agent 1.2 was released (it was in March, 2005), the program closed established connections, renewed or released DHCP configuration. Also was implemented ARP and IP route tools to edit ARP and IP routing tables.

Version 1.3 was released in August, 2005. The new feature of showing the owning process was added. New actions like terminate the process were implemented.

The next version 1.4 had the improved stability and new features like persistent routes, process information, and version checker. It was in March, 2006.

In May, a lot of bugs were solved and NetStat Agent 1.5 was released.

Since version 1.6 was released in September 2006, the program allows to show a country by the remote IP address for netstat, ping and tracert.

NetStat Agent 1.7 was released in November 2006. The country database was updated and some changes in GUI were added.

Unfortunately, the graphical user interface of NetStat Agent was not perfect. Some information was hard readable. So we decided to rewrite the program. The first beta version was implemented in April, 2008. And the major release was done in June 9, 2008.

Now NetStat Agent 2.0 has more handy and easy-to-use graphical user interface. It has new tools like Whois and HTTP Checker. Connection monitor has a lot of new powerful features. In the previous version only one action per monitor rule was available. Now you can select more than one action. The program allows to monitor ARP cache.