Security Incidents mailing list archives
Re: DOS by Flooding a Network
From: <jlewis () lewis org>
Date: Mon, 17 Jun 2002 17:43:52 -0400 (EDT)
A real provider should be willing to blackhole route the destination address (assuming the attack is directed at a single IP) so that your internet connection is not flooded. If the attack is aimed at randomly changing IPs on your network, that makes blocking it at the upstream much more difficult, if possible at all. On Mon, 17 Jun 2002, Richard Ginski wrote:
This past weekend, we experienced the periodic flooding of our network. The flooding caused our network to be inaccessible. The traffic has mainly been ICMP: large quantities of large spoofed packets...similar to "ping-of-death. Appropriate patching has been applied so the actual attach does not shut anything down. However, it does succeed in flooding of our network rendering it inaccessible. We are trying to figure out a way, if any, to mitigate this attack from flooding our network in the future. We tried to coordinate with our ISP upstream but they say they can't do anything....and we feel sending resets on our end would be useless and ineffective. We are trying to figure out a way to eliminate the "choke point" or "bottle neck" when the attacks occur. I feel we should be able to do something better than just "weathering the storm". Any suggestions? TIA ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
-- ---------------------------------------------------------------------- Jon Lewis *jlewis () lewis org*| I route System Administrator | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________ ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
Current thread:
- DOS by Flooding a Network Richard Ginski (Jun 17)
- Re: DOS by Flooding a Network jlewis (Jun 17)
- New script-kiddie looking scan Jeff Kell (Jun 18)
- Re: New script-kiddie looking scan Luis Bruno (Jun 18)
- Re: New script-kiddie looking scan zeno (Jun 18)
- Re: New script-kiddie looking scan Chris Ess (Jun 18)
- Re: New script-kiddie looking scan Alain Fauconnet (Jun 18)
- Re: New script-kiddie looking scan Steffen Dettmer (Jun 19)
- New script-kiddie looking scan Jeff Kell (Jun 18)
- Re: New script-kiddie looking scan Russell Fulton (Jun 18)
- Re: DOS by Flooding a Network jlewis (Jun 17)
- Re: DOS by Flooding a Network Vitaly Osipov (Jun 18)