30 Jul
2002
30 Jul
'02
11:16 a.m.
Hank Nussbacher wrote:
So, to restate the problem, how do we identify some of the sources of a DoS attack quickly, maybe even while the attack is still in progress?
Not a complete solution but a start: IP Source Tracker:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120 limit/120s/120s21/ipst.htm
Available as of 12.0(22)S for 7500 and 12000 series Cisco routers.
Hank, one major flaw with this is that you can't track back further when you are on an (ethernet based) IXP. IIRC older versions of IOS gave L2 information (MAC address) as well which helped you to identify the last hop. -- Arnold -- Arnold Nipper / nIPper consulting e-mail: arnold@nipper.de phone/mob: +49 172 265 0958 fax: +49 6224 9259 333