It could be an error in Xitami's dynamic-store allocation logic that causes it to fail to reclaim the discarded memory per connection ? Call for Memory Leak Detection Tools http://www.cs.colorado.edu/homes/zorn/public_html/MallocDebug.html Regards, --------- Muhammad Faisal Rauf Danka Chief Technology Officer Gem Internet Services (Pvt) Ltd. web: www.gem.net.pk --- "Matthew Murphy" <mattmurphyat_private> wrote: >>What is vendor's status regarding this issue? > >I've e-mailed the vendor, but have received no response *at all*. > >>It is good we found the real cause of DoS effect in Xitami. >>Because, the maxedout values seem to work quiet fine, the problem is >>Keep-Alive Connection handling. > >Yes, I originally thought it was a connection flood because numbers >started jumping and then Xitami crashed almost immediately. However, >I was actually seeing the effects of my flood combined with numerous >other connections that had "hung open". > >>I don't know how did you actually find out when it has dropped a >>particular connection > >Well, I didn't find out when it was dropping connections, just that >it *wasn't* dropping any. My WinME box btw required an >extremely high number of connections to crash (I believe the number >was over 450), so production machines will require significantly >more connections -- it seems to be a bug-induced resource exhaustion. > >>as in the duration of Keep-Alive affected and >>it's connection dropping time and whether it matches the value in >configurations? after how long ? >>I tried netstat -an frequently by making requests from different hosts on >my network, but same results as i told you before. > >I'm still a bit hazy on exactly *where* in the keep-alive handling that >Xitami is buggy -- I'm beginning to think that it is not actually related >to an open connection, and instead just a bad resource cleanup on >the server end. _____________________________________________________________ --------------------------- [ATTITUDEX.COM] http://www.attitudex.com/ --------------------------- _____________________________________________________________ Promote your group and strengthen ties to your members with emailat_private by Everyone.net http://www.everyone.net/?btn=tag _______________________________________________ Full-Disclosure - We believe in it. Full-Disclosureat_private http://lists.netsys.com/mailman/listinfo/full-disclosure
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