![]() These are often done by creating specific static host routes and point them to the pseudo interface Null0. Yes, “Null Route” is a Packet Filterįorwarding packets to Null 0 (aka Null Route) is a common way to filter packets bound to specific destination. RTBH is a foundation Operator’s Security tool for which many other security tools are built upon. What we’ll cover are the essential RTBH principles along with deployment experience from the 15 years of operational deployment. This technique is especially useful in some of the new ISP security classification, traceback, and reaction techniques. Remote triggering via iBGP allows ISPs to activate a network wide destination based black hole throughout their network. It did not cover the remote triggered black hole routing technique. The Cisco ISP Essentials book covers the fundamentals of the single router based black hole routing technique. Remote Triggered Black Hole is a flexible ISP, Carrier, and Large Enterprise Security tool that will route packets to Null0 (i.e. (This work was originally published 2002-08 as a supplement to the ISP Essentials book by Barry Raveendran Greene, and Philip Smith.) We call this BGP security technique a Remote Triggered Black Hole (RTBH). This also means we can use BGP to move BAD traffic to places that minimize the hard to the Internet – including places that “just drop” BAD traffic. We use BGP as a tool to move and route GOOD traffic from one part of the Internet to the other. The Border Gateway Protocol (BGP) is the glue which connect the Internet together. The foundation tool for that redirection is the used of the Border Gateway Protocol (BGP) and the Remote Triggered Black Hole (RTBH).įor over 15 years, the core anti-DOS security tool is the same tool we use to glue the Internet. ![]() Of the three, redirection has been one of the mostly commonly used tools to “redirect” the DOS attack to a location which the Operator can better manage the attack. When DOS attacks are forces on the Internet which can be addressed with either of the three options. Now think of that “force” in the form of a Denial of Service (Attack). Or, you can redirect the force to a location that you choose. You can step aside and let the force push past you. You can push back directly against that force. You have three choices when you stand in front of an on rushing force.
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