nanog mailing list archives
Re: Mitigating HTTP DDoS attacks?
From: Peter Dambier <peter () peter-dambier de>
Date: Tue, 25 Mar 2008 09:22:33 +0100
On Mon, Mar 24, 2008 at 11:34:58PM +0000, Paul Vixie wrote:i only use or recommend operating systems that have their own host based firewalls.
That was exactly my problem. Barney Wolff wrote:
What finally broke was doing a table list, possibly because the command prints in sorted order.
Happened to me too. First step: Borrowed "sort.c" from Minix. Next step: Large swap file. Finally: changed the distribution. sort is one the biggest hidden problems. There are broken sorts around, I guess some of the problems are character set specific. There is no more EBCDIC but UTF-8 and UTF-16 are even worse. Related to sort, you may have more than enough memory or swap but your process wont get it. You can avoid sorting by looking into the "/proc" files. proc2pl might get you ideas, from the ISAON tools on http://iason.site.voila.fr/ You might even sort or grep the output and you can always do that on a machine that is not your router. Kind regards Peter -- Peter and Karin Dambier Cesidian Root - Radice Cesidiana Rimbacher Strasse 16 D-69509 Moerlenbach-Bonsweiher +49(6209)795-816 (Telekom) +49(6252)750-308 (VoIP: sipgate.de) mail: peter () peter-dambier de http://iason.site.voila.fr/ https://sourceforge.net/projects/iason/ http://www.cesidianroot.com/
Current thread:
- Mitigating HTTP DDoS attacks? Mike Lyon (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Roland Dobbins (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Tim Yocum (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Roland Dobbins (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Tim Yocum (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Paul Vixie (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Mike Lewinski (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Barney Wolff (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Peter Dambier (Mar 25)
- Re: Mitigating HTTP DDoS attacks? Paul Wall (Mar 25)
- Re: Mitigating HTTP DDoS attacks? Roland Dobbins (Mar 24)
- RE: Mitigating HTTP DDoS attacks? Frank Bulk - iNAME (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Roland Dobbins (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Rodrick Brown (Mar 24)
- Re: Mitigating HTTP DDoS attacks? Steven M. Bellovin (Mar 25)
- RE: Mitigating HTTP DDoS attacks? Darden, Patrick S. (Mar 25)
- <Possible follow-ups>
- Re: Mitigating HTTP DDoS attacks? Roger Marquis (Mar 24)