North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: DNS deluge for x.p.ctrc.cc
On Sun, 26 Feb 2006, Joe Abley wrote: > As a temporary mitigation tool today, when the volume of legitimate, > large-packet EDNS0 traffic is near-zero, blocking big 53/udp packets > might *sound* reasonable. However, we all know how permanent how are you certain that the udp/53 1500 byte packet is 'dns'? and not kazaa/gnutella/bittorrent/vpn-in-udp-53 ? It seems that filtering the TRAFFIC is short sighted on several fronts :( deciding if you will/won't be part of the global-recursive-dns-server 'problem' is entirely different though. > temporary filters can be. Crippling EDNS0 transport in the future > seems like a very high price to pay for what might be a very > temporary, short-term reduction in attack traffic. > seems like global tcp/139|tcp/445 filters, or bogon filters... bits put into configs 'now' and completely forgotten about 'tomorrow' :(
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