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The output of the netstat command is fairly simple. The -a option says to
include in the netstat output the ports that your current machine is
listening for connections on. Without it, it would just list active
connections.
The first column (Proto) lists to protocol of the connection/listening
socket (TCP or UDP)
The second column is the local address (the machine that netstat is being
run on) and the port number. Most outbound connections have source ports
over 1024.
The third column is the address of the other machine in this connection and
the port number. since 80 is the standard web port, I would assume that your
machine has a web browser running and these are the ip addresses of the web
servers that you are connected to. I believe that 5190 is the standard port
for AIM, so you might be running a copy of AOL Instant Messenger on your
machine as well.
The fourth column is the connection state. This lists whether the connection
is just being set up, established, or being torn down. Established
connections are currently active, while this time_wait connection I believe
has closed and is just waiting for packets that may still be floating around
the network.
If the word listening was in the STATE column, then you would be running
some tcp service that would be willing to answer a connection, such as a web
server, or ftp server.
I believe that *:* next to the udp stuff indicates that your machine is
willing to accept packets on those ports.
C:\WINDOWS>netstat -a
Active Connections
Proto Local Address Foreign Address State
TCP thum:1363 gfx.law7.hotmail.com:80 TIME_WAIT
TCP thum:1374 63.85.84.140:80 ESTABLISHED
TCP thum:1375 63.85.84.140:80 ESTABLISHED
TCP thum:1210 195.219.48.9:80 ESTABLISHED
TCP thum:1211 195.219.48.9:80 ESTABLISHED
TCP thum:1247 205.188.4.217:5190 ESTABLISHED
UDP thum:sytek *:*
UDP thum:nbname *:*
UDP thum:nbdatagram *:*
UDP thum:1032 *:*
C:\WINDOWS>
can someone out therre please explain to me all the stuff above ? or
recommend some source that i can refer to for detail info about this
"netstat -a" command ?
thousand thanks to you !
best regards,
Kelvin
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