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IP announce DOS
From: Alex Thurlow <buddychrist () gmail com>
Date: Wed, 08 Jun 2005 16:23:50 -0500

I'm not positive this is the correct list to ask, but it is a security concern, so I thought I would. The company I work for had T1 lines running to our office provided by a local provider. We had our own C block of IPs being announced by them and routed to us over those T1s. Our relationship with them went sour (for many reasons I won't get into here), and we had to move to a different provider. We had the routing switched over to them. Everything was fine. Here it is a few weeks later, and suddenly our old provider starts announcing these IPs again. The end result is a partial DOS attack (hence writing to this list) as some people can't reach us. They won't stop the announcement. I don't know all the details on what they've said there as it's now gone to executives and legal people dealing with them. Is there anything we can do here from a network standpoint? Someone we can report them to? How do people protect themselves from just anyone announcing IPs that aren't theirs?

Thanks in advance,
Alex Thurlow


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