EN
Linux - list all connected tcp clients
2 points
In this article, we're going to have a look at how to print connected tcp/tcp6 clients and their ip adresses with netstat command under Bash in Linux.
Type in terminal:
xxxxxxxxxx1
netstat -tnWhere:
-tmeans tcp connections only,-nshow numerical addresses.
Becasue:
netstat -tnis equivalent tonetstat -t -n
Console print:
xxxxxxxxxx1
Active Internet connections (w/o servers)2
Proto Recv-Q Send-Q Local Address Foreign Address State3
tcp6 0 0 83.145.210.81:80 172.69.134.86:45022 ESTABLISHED4
tcp6 0 0 83.145.210.81:80 172.69.134.224:50256 TIME_WAIT5
tcp6 0 0 83.145.210.81:80 172.69.134.230:13386 TIME_WAIT6
tcp6 0 0 83.145.210.81:80 162.158.167.193:27216 TIME_WAIT7
tcp6 0 0 83.145.210.81:80 162.158.154.66:17908 ESTABLISHED8
tcp6 0 0 83.145.210.81:80 141.101.104.246:45062 ESTABLISHED9
tcp6 0 0 83.145.210.81:80 162.158.88.25:25148 ESTABLISHED10
tcp6 0 0 83.145.210.81:80 172.68.244.11:48602 ESTABLISHED11
tcp6 0 463 83.145.210.81:80 162.158.167.7:63428 ESTABLISHED12
tcp6 0 0 83.145.210.81:80 172.69.134.122:56144 TIME_WAIT13
tcp6 0 0 83.145.210.81:80 162.158.165.233:17370 TIME_WAIT14
tcp6 0 0 83.145.210.81:80 172.69.134.224:39788 TIME_WAIT15
tcp6 0 0 83.145.210.81:80 162.158.166.218:64254 TIME_WAITWhere:
Foreign Address- shows ip addresses for connected clients
Note: as we can see in console print, there are connected only
tcp6clients.
If we would like remove errors we can redirect stderr (standard error output) to null dev (place where unnecessary things "vanish") with following command:
xxxxxxxxxx1
netstat -tn 2>/dev/nullWhere:
2>redirects error output to other place.
If we would like to make print scrollable following command will be useful:
xxxxxxxxxx1
netstat -tn 2>/dev/null | lessWhere:
|redirects ouput from one program to another one,lessdisplays results in scrollable form.
