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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])
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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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