Netstat (network statistic) is a tool, common to Windows, Unix and Linux, used to obtain information about network connections (outbound and inbound), routing tables, and a range of information on the use of statistics the network interface. Netstat.exe command line that shows all open ports for ...

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What is the difference between :::: and 0.0.0.0 from the netstat -an output?

I just want to understand the difference between :::: and 0.0.0.0. I believe both are same which let connection from outside if any processor is listening to that port. udp 0 0 ...
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1answer
204 views

How can I determine why a network connection is open on my computer?

I am running Windows 7 64-bit. I can see which network connections are established by running netstat -anb. This tells me that there are a lot of connections established by "System". Is there any ...
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2answers
1k views

Kill UDP port that has no process?

My VPN client sometimes can't bind to the UDP port (500) it uses. It seems to leave behind a "bind" to port 500 on a previous run, even though it has quit. The port is reported as "already in ...
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471 views

How can I unbind a UDP port that has no entry in lsof?

On my Mac, I have a UDP port that is "already in use", but doesn't have an associated process: sudo netstat -na | grep "udp.*\.500\>" shows udp4 0 0 192.168.50.181.500 *.* ...
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How does Mac OSX prioritize network interfaces when routing?

To give a concrete example, how does OSX choose which of these default entries from netstat -nr to route to? Destination Gateway Flags Refs Use Netif Expire 0/1 ...
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823 views

Continuously check netstat output for a particular program

I have a android emulator running on port 5554. I want to continuously watch the netstat output concerning emulator stuff. Right now I have to manually execute this command every time sudo netstat ...
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128 views

How to know which package yum is going to download or install now?

Now I am installing a couple of packages using yum on centos, what make me confused is that the system seems to be block at some point, in fact I know yum is downloading some packages from repo, but I ...
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2k views

Interpreting statistics from netstat -s

I'm running netstat -s on my Ubuntu box at home to get network interface statistics. There are a bunch of numbers printed out, like this: Ip: 10256 total packets received 8 with invalid ...
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1answer
4k views

Netstat Real-time TCP/IP Monitoring

Using Mac OS X's Terminal application, I want to use netstat to display a real-time, continuous listing of my internet connections. For example, with Terminal open and the proper netstat command in ...
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426 views

ping and tracert don't work, while netstat does on windows pc

I am relatively new here and I don't even know if I'm asking the qn in the correct site. Please bear with me if I'm wrong. In my command line netstat works, but ping and tracert don't. I don't get ...
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602 views

How to get netstat results grouping by app name?

I use windows 7. I want get result such as distinct netstat -b. Just get a list of all applications use the network. How to do it?
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1k views

The meaning of port 0 in netstat output

What is the meaning of port 0 in netstat -an output in Windows? I'm asking about socket in Foreign address column: 0.0.0.0:0 I know that 0.0.0.0 address means, that host is listening on all ...
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How to kill a particular tcp connection in windows?

On Linux we can kill an Established TCP Connection using tcpkill command. For example, to drop all connection to/from a particular IP: tcpkill host ipaddr Or similary to kill all connection ...
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149 views

What exactly is using port 29178

I am trying to launch a program which is uses port 29178 but it won't start up because it says the port is already in use. Netstat gives me this C:\Rush>netstat -aon | findstr 29178 TCP ...
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317 views

Already dead process is continuing to eat net traffic

I'm using Windows 7, Ruby 1.9.2, SciTE, Outpost Pro 2009 and NetBalancer. Wrinting Ruby programs in SciTE I press Ctrl+Break to kill them. This way is designed to be easy, quick and reliable. But now ...
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3k views

What does 'Listening' refer to when looking at the results displayed by netstat?

I am having a hard time understanding what 'Listening' refers to when I am looking at the netstat results of my PC for example. Does it mean I have an application or service that is waiting for a ...
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1answer
773 views

Why does netstat on Windows show connections over 24 hours old?

I'm getting the error relating to port exhaustion on my server ("Only one usage of each socket address (protocol/network address/port) is normally permitted"). So, I checked with netstat -n, and it ...
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2answers
867 views

Unix basic shell script help needed please?

I need some help writing a basic Unix shell script that will run on AIX: Loop that will run a netstat command (netstat -an| grep 16752| grep ESTABLISHED| wc -l) that counts sessions every second and ...
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350 views

When and why does Gateway Metric become equal to Interface Metric ? (Windows network Adapters)

netsh interface ip show address .... command reveals some information about the gateway and interface metrics of each type of adapter . However the gateway metric seems to alwyas change and sometimes ...
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3answers
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How can I tell which of multiple network cards is in use?

Suppose I have multiple network cards connected to my PC, how can I know which card is used for communication. For example, if I use ping 192.168.x.xxx I would like to know which card (and which ...
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1answer
695 views

Where does netstat get the process name?

I am developing a node application and there is an option to set the process title (process name). This only sets it in some tools (like ps and top), but not in htop or netstat. I found this article ...
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401 views

What's the '-' stands for in the output of 'netstat -anp'?

I want to use netstat -anp to check which program/process is listening a specific port. But the output includes lots of lines in which the value of 'PID/Program Name' column is just a -. For example ...
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773 views

Why netstat/TCPView/CurrPorts lists processes as unknown?

I'm trying to record data of all the processes that establish connections from my PC for security issues, I tried to do netstat -bn 1 > stats.txt, also tried to make a log file with CurrPorts, TCPView ...
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1answer
2k views

why can't I open a port on Win 7? is it the app's fault?

I am having problems opening a port from one Windows PC on my local network. On Windows 7 computer ("Computer A") I running Calibre, an ebook management program that has something called an "ebook ...
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2answers
1k views

Count exchanged bytes per TCP connection

I need to get a table updated with the exchanged bytes (Rx and/or Tx) for each ESTABLISHED TCP connection on a linux machine (well, at least, a list of connections (port ranges), thus not actually ...
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352 views

what is ip 10.1.1.130 to which seems monitored by NT Kernel & System process on Windows 7?

I used netstat to see what is happening with network connections, and I see this weird ip address somehow listed together with PID 4 "NT Kernel & System", whatever that might be. Netstat describes ...
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Windows XP can use a wired network port, but MacBook (OS X) fails on the same port

I wired the Cat5 in my house seven years ago. The wired ports have worked fine with both my Windows XP laptop and MacBook. My wireless network also works fine, but I like to use wired occasionally. ...
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3answers
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Output of “netstat” shows domain I never visited

I think my MacBook Pro might be hacked. The reason I found out about the stackoverflow.com website is because I did a netstat search in Terminal. My browser was closed but nevertheless it showed this: ...
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How to interpret the output of netstat -o / netstat --timers

netstat -o includes some timer information in the output but I haven't found an explanation of the output in the Timer column anywhere. Can anybody explain this or point to an explanation? This ist ...
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1answer
2k views

Netstat -a command : Difference between 0.0.0.0 and 127.0.0.1

When running netstat -a on my local machine, i see ports on the 0.0.0.0 address listening. I would assume that 0.0.0.0 is my local machine, except that i also see 127.0.0.1 listening to specific ...
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1answer
1k views

My Mac OS X 10.5 netstat reveals a lot of open UDP connections

here are my netstat results (besides server-less connections): Active Internet connections Proto Recv-Q Send-Q Local Address Foreign Address (state) tcp4 0 0 ...
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1answer
1k views

How do I understand netstat output?

Recently in wondering about my slower-than-usual internet connection, I learned that you can run the netstat command line in the command prompt. However, when I use this it tends to show things ...
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934 views

What does netstat mean by “acknowledgments not containing data received”?

Netstat reports some TCP packets in the following category acknowledgments not containing data received. However, I'm not clear what this phrase means. Goggling and the netstat documentation don't ...
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2answers
4k views

How to find who is connected to my computer from MAC address?

When I type in the command netstat -an into cmd, I get information that one of my ports is opened from some MAC address. My qestion is how to close that port and how to find from the MAC address what ...
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How do I kill a process that is dead but listening?

I'm developing an app that listens on port 3000. Apparently there's an instance of it still listening to the port because whenever I start it, it can't create a listener (C#, TcpListener, but that's ...
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1answer
236 views

Nestat -ano what does it mean?

I tried checking my PC if there are some loggers installed and what I get was: TCP 192.168.1.7:2642 192.168.1.2:445 ESTABLISHED 4 When I checked in my Task Manager it says system? What ...
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1answer
2k views

netstat: grep lines related to a specific process

I know that, in Windows, you could do the following to see what processes are attached to a port: netstat -a -b However, how would you limit the display to ports attached to a specific process? I ...
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1answer
2k views

Could you help me to understand netstat output?

I am trying to figure out how to get IP of a suspicious access point I am using to access the internet. Running netstat, I get the following: $ netstat -rn Routing tables Internet: Destination ...
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443 views

Filtering UDS from output of netstat without grep

how I cat to filter out information about Unix Domain Sockets from netstat output without grep? Is there some option for command (I not found it in man of netstat). Thank you for ahead.
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376 views

How to analyse the results of a netstat command on Windows, as during the night my internet connection slows down?

My internet connection gets very slow at night and my ISP told me to use netstat to see how many tcp connetions there is there is usually about 30 or more with ether time wait established but I also ...
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1answer
13k views

How can I close a port (seen open on netstat)?

I used netstat and I see some ports open that I want closed. How do I close them? The computer is a Mac running OS X
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191 views

How can I determine the process for what is listening on the network in linux?

When I use netstat -tup, it only shows the processes for some. There are other ports that just have a - for PID, so how would I find out what process is listening on these ports?
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269 views

Netstat -i redirection problem

When I run this command netstat -t 1 -i 2>&1 > $NETStat_OUT_FILE & inside a script , the output of netstat does not get redirected to the file.. Could any one find a solution for this ?
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Is it possible to know which process opened a connection in Windows?

With netstat -a I can see all connections from my machine to the MySQL Server. There is any way too see which process or executable is responsible for each connection? The only solution I found so ...