North American Network Operators Group|
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Re: Real world Anti-DDOS attack practice.
On Fri, Mar 23, 2001 at 05:25:22AM -0800, firstname.lastname@example.org wrote: > Good suggestions all, but as a short-term solution access lists work. A > Cisco 7500 with an access list 30 pages long (literally -- I printed it > out once) works on an OC48. Not sure how that would stand up to a couple > truly massive floods, but it works fine under normal traffic and the > average flooding any ISP gets. Yeah, but the challenge is getting an OC48 into a 7500. ;) And frankly, I've -never- seen a significant access list perform well on an RSP4 at even OC3 level. Then again, the last time I tried such a thing I wouldn't touch CEF with a 10-foot pole. Maybe it's better now. -c  significant = longer than about 5 lines, even with 'permit tcp estab' as the first line