Scripting

How to list connections on the server with netstat command

You can find the connections on the server using the following command. This will help us to determine if the server is under DDOS attack.

 
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

An example output of the mentioned command is given below:

 
2 177.177.215.117
2 207.46.13.148
2 62.212.75.234
2 66.249.78.201
2 68.180.229.109
2 86.98.48.85
3 86.96.48.123
6 122.174.220.250
9 108.162.229.84
10 141.101.89.173
13 220.227.139.194

That’s it!

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