One common method of denial-of-service attack ( DoS) involves saturating the target machine with external communications requests.

If you want an indication of a denial of service (DoS) attack against your system’s , just run this command:

This command executes this steps.

Show all tcp connections in numeric format :

Parsing connections that are received from the network:

Count how many answers of SYN_RECV are:

You can perform a lot more complex things using netstat.
You can also add this in your .bashrc file.

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