nanog mailing list archives
Using Policy Routing to stop DoS attacks
From: Christian Liendo <cliendo () globix com>
Date: Tue, 25 Mar 2003 09:06:01 -0500
Looking for advice. I am sorry if this was discussed before, but I cannot seem to find this.I want to use source routing as a way to stop a DoS rather than use access-lists.
In other words, lets say I know the source IP (range of IPs) of an attack and they do not change.
If the destination stays the same I can easily null route the destination, but what if the destination constantly changes. So I have to work based on the source IP.
Depending on the router and the code, if I implement an access-list then the CPU utilization shoots through the roof. What I would like to try and do is use source routing to route that traffic to null. I figured it would be easier on the router than an access-list.
Has anyone else tried this successfully on ciscos and junipers? Is it easier on the CPU than access-lists? Is there a link I cannot find on cisco or google? Thanks Christian Liendo
Current thread:
- Using Policy Routing to stop DoS attacks Christian Liendo (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Haesu (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Christian Liendo (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Jack Bates (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Rafi Sadowsky (Mar 25)
- Re: Using Policy Routing to stop DoS attacks John Kristoff (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Haesu (Mar 25)
- Re: Using Policy Routing to stop DoS attacks fingers (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Christopher L. Morrow (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Haesu (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Haesu (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Haesu (Mar 25)
- Re: Using Policy Routing to stop DoS attacks Christopher L. Morrow (Mar 25)