Internet Under Attack
by Steve Gibson, Feb 09, 2000 1:13am PSTHacker groups have talked about stuff like this for years, but it looks like someone is finally pulling it off. An unknown person or party have managed to create the most impressive Denial of Service attacks ever (another story on ABC). Within the past 30 hours they have taken Yahoo, CNN, eBay, Buy.com, and Amazon.com all offline for multiple hours.
All five assaults were what are known as denial-of-service attacks, which entails someone bombarding a site with mock traffic. What results is an Internet traffic jam, effectively blocking out users. All of this weeks attacks appeared to be coordinated efforts from multiple points on the Internet.
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Comments
i saw this last night and found it quite humerous. Although the chance of that being true
is slim to none... you never know...
btw, You can go to http://www.netscan.org/ to have em quickly scan your network for the simpler outgoing smurf amplification vulnerability.
haha
Host Name IP Address Hop Ping Time Ping Avg % Loss Pkts r/s Ping best/worst
pos3-1-0-155M.hr2.IAD.gblx.net 206.132.253.50 11 164ms 144ms 0% 17 / 17 131ms / 164ms
s3-0.cr1.BWI.gblx.net 209.143.255.6 12 193ms 193ms 94% 1 / 17 193ms / 193ms
alabanza.s3-1.cr1.BWI.gblx.net 209.143.255.26 13 150ms 197ms 0% 16 / 16 136ms / 694ms
shugashack.com 216.147.36.10 14 140ms 143ms 68% 5 / 16 140ms / 149ms
Thanks!
-Lex
Wait.
Um, Maarten, Steve might be a while, could you look into the hacker thing?
no, i wouldn\'t call DoS hacking. i\'d call it cracking - there\'s a diff.
What seperates the human traffic from the DoS traffic in order to filter it? Human traffic has an intelligent pattern (well.. maybe heh), DoS traffic can simulate those patterns beyond a random url walk. Human traffic is a mix of browers, http DoS traffic can simply use a log of user_agent frequency to simulate this.
Anyway... a site like yahoo has a baseline right? and they know their \"we\'re screwed\" ceiling right? When the spike occurs and they\'re running out of sockets /resources why not just ignore all the new IP\'s encountered during the spike while continuing to respond to those before it? A human won\'t continue to hammer a site that isn\'t responding to it, but an automated DoS client will... perm ban those.
hell, whenever Yahoo won\'t come up for my dad (not too often) he asks if the Internet crashed....wtf?
I read somewhere that the top .1% of sites are responsible for something like 50% of the total bandwidth/hits/visitors.
so someone can take down Yahoo, MSNBC, AOL, and CNN and some people will think that the entire thing went down
[and heck, once you have the major sites down, it takes less effort than that to take the rest down (which like you said is impossible with the thousands (millions?) of servers out there]
That\'s not how smurfing works at all. You don\'t send the packets through \"lots of routers so its hard to trace\", you change the packet to say that it came from a different IP entirely. Also, you don\'t launch the packets from your own machine, you use shells on other people\'s machines (usually ones they\'re not aware of, like grabbing lots of cable modems).
http://www.detonate.net
http://www.somethingawful.com/jeffk/hax0r1ng.htm