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How Do I Drop or Block Attackers IP Address With Null Routes On a Linux?

Feb 02, 2016, 14:00 (0 Talkback[s])
(Other stories by Anonymous)

Someone might attack your Linux based system. You can drop attacker IP using IPtables. However, you can use the route or ip command to null route unwanted traffic. A null route (also called as blackhole route) is a network route or kernel routing table entry that goes nowhere. Matching packets are dropped (ignored) rather than forwarded, acting as a kind of very limited firewall. The act of using null routes is often called blackhole filtering.

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