hpr4041 :: Using grepcidr to find IPs in a netblock
An introduction to the grepcidr command, which makes finding IPs from a netblock in log files easier
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cli, command line, linux, sysadmin, networking.
1.
The show is available on the Internet Archive at: https://archive.org/details/hpr4041
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general.
grepcidr is usually available from your distribution's default repositories, so on Debian based systems you could install it with:
sudo apt install grepcidrExample of grepcidr use:
grepcidr 40.10.32.0/22 /var/log/syslogYou can read more about CIDR notation on the Wikipedia page for CIDR