North American Network Operators Group

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Re: [c-nsp] [Re: huge amount of weird traffic on poin-to-point ethernet link]

  • From: Robert Boyle
  • Date: Fri Nov 10 01:27:20 2006

At 06:58 PM 11/9/2006, you wrote:
automatic systems are fine if you decide you want to do them, i was specifically responding to the author who suggested he would build the filters himself, my point was that this seemingly good intention is in fact causing real operational problems on The Internet right now as anyone receiving addresses from newly allocated blocks will attest to
Since I am the OP, I never said that filtering bogons was a miracle cure all. If we put static bogon filters on customer routers, I would agree that would be stupid and would cause maintenance and routing problems. As an ISP several assignments from formerly bogon blocks, I agree and understand your point. However, we are religious about updating our bogon filters and we never block legitimate traffic or announcements. Bogon filtering is just one thing among many which I think should be done. Following BCP38 and filtering what comes in from customers and transit/peer connections all help to ensure that you aren't part of the problem to the community or to your own clients. The original poster who I replied to stated that it appeared that some traffic of unknown origin on a private address was being routed across his network between routers and he didn't have any routes for that network in his routing tables. My response was that those announcements and traffic should be filtered at his edge. This turned into a thread about whether filtering was a good thing or not which in my mind is absurd. However, if you run a network and want to accept traffic from bogon and RFC1918 space over your customer, peering, and transit connections then that's your problem. I just choose to not make it mine.


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