Archive for the tag 'largest'

SBDavid
Jul 16th, 2010

Using netstat to find largest number of established connections

Using netstat to find largest number of established connections

To find out the largest number of established connections you can simply use something like

netstat -an | grep ‘ESTABLISHED’ | awk ‘{print $4}’ | cut -d: -f1 | uniq -c | sort -rn | head -n 1
3 192.168.1.2

To see the list of the top 10

netstat -an | grep ‘ESTABLISHED’ | awk ‘{print $4}’ | cut -d: -f1 | uniq -c | sort -rn | head -n 10
2 192.168.1.2

How to view all

netstat -an | grep ‘ESTABLISHED’ | awk ‘{print $4}’ | cut -d: -f1 | uniq -c | sort -rn
3 192.168.1.2

You can also view all but have pages so you can view each in detail

netstat -an | grep ‘ESTABLISHED’ | awk ‘{print $4}’ | cut -d: -f1 | uniq -c | sort -rn | more
8 192.168.1.2

You can show the port with:

netstat -an | grep ‘ESTABLISHED’ | awk ‘{print $4}’ | uniq -c | sort -rn
1 192.168.1.2:58632
1 192.168.1.2:58631
1 192.168.1.2:58629
1 192.168.1.2:58628
1 192.168.1.2:58627
1 192.168.1.2:58613
1 192.168.1.2:55154
1 192.168.1.2:48673