Linux How To Block IP Addresses Using IPTABLES And IPset

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Linux How To Block IP Addresses Using IPTABLES And IPset

iptables is the user-space tool for configuring firewall rules in the Linux kernel.

Most system administrators will already be familiar with iptables. It is around for quite a while, and is enabled by default within the Linux kernel. We can use iptables to block one or multiple IP addresses. This may come in handy when you get repeating port scans or see failed login attempts in your log files.

ipset is an extension to iptables that allows you to create firewall rules that match entire "sets" of addresses at once.


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