North American Network Operators Group|
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Re: Mitigating HTTP DDoS attacks?
> 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: [email protected] http://iason.site.voila.fr/ https://sourceforge.net/projects/iason/ http://www.cesidianroot.com/