How to interpret NETSTAT command?
How do we actually interpret netstat command.
For eg:consider the below result for a port 'abc' on the server xxx.
netstat -a | grep abc
tcp 0 0 xxx.abc yyy.1 ESTABLISHED
tcp 0 0 xxx.abc yyy.2 ESTABLISHED
tcp 0 0 *.abc *.* LISTEN
tcp 0 0 xxx.abc yyy.3 CLOSE_WAIT
Ah! I understand its a tcp connection and abc are listening ports trying to listen to the 'established' connection from the ports 1,2,3 from a client machine yyy.
Outgoing packets and incoming packets are 0 currently and since a TCP connection from yyy.3 can be 'closed' to abc port of xxx only after yyy receives a ack from xxx.
I feel I am missing upon other stuff here, any other deductions?
For eg:consider the below result for a port 'abc' on the server xxx.
netstat -a | grep abc
tcp 0 0 xxx.abc yyy.1 ESTABLISHED
tcp 0 0 xxx.abc yyy.2 ESTABLISHED
tcp 0 0 *.abc *.* LISTEN
tcp 0 0 xxx.abc yyy.3 CLOSE_WAIT
Ah! I understand its a tcp connection and abc are listening ports trying to listen to the 'established' connection from the ports 1,2,3 from a client machine yyy.
Outgoing packets and incoming packets are 0 currently and since a TCP connection from yyy.3 can be 'closed' to abc port of xxx only after yyy receives a ack from xxx.
I feel I am missing upon other stuff here, any other deductions?
Replies
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Anil JainAh !! nice topic, I always loved to discuss about commands.
netstat (network statistics) is a command-line tool that displays network connections (both incoming and outgoing), routing tables, and a number of network interface statistics. It is available on Unix, Unix-like, and Windows NT-based operating systems.
It will take lots of space to explain the command with each attribute. For in depth knowledge of NETSTAT you can refer the following sites:
For Windows: #-Link-Snipped-# (Netstat command)
For Linux: #-Link-Snipped-# -
madhumurundito know about more on netstat type netstat -? in command prompt you will get an help mesage
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