Re: [EMAIL PROTECTED] How to prevent from simple DoS?

2007-11-19 Thread Ben Macintosh
2007/11/18, Joshua Slive [EMAIL PROTECTED]: See: http://httpd.apache.org/docs/trunk/misc/security_tips.html#dos The standard solution is a simple firewall rule to control number of connections per ip at some reasonable level. I already thought about using a firewall rule. Although it could

Re: [EMAIL PROTECTED] How to prevent from simple DoS?

2007-11-19 Thread Ben Macintosh
2007/11/19, Christian Folini [EMAIL PROTECTED]: As I understand the issue it's a very simple DoS as it neither does require a lot of cpu nor bandwidth on the client side. Is there a proper name for this kind of attack. I am not sure the original question was referring to a real attack.

Re: [EMAIL PROTECTED] How to prevent from simple DoS?

2007-11-19 Thread Ben Macintosh
2007/11/19, Greg Boyington [EMAIL PROTECTED]: On Nov 19, 2007 3:21 AM, Christian Folini [EMAIL PROTECTED] wrote: Hey Greg, could you elaborate on this? How would you prevent this attack with mod_access? In one case where an attack was under way but I didn't have access to the firewall,

Re: [EMAIL PROTECTED] How to prevent from simple DoS?

2007-11-19 Thread Ben Macintosh
2007/11/19, Nick Kew [EMAIL PROTECTED]: On Mon, 19 Nov 2007 20:19:20 +0100 Ben Macintosh [EMAIL PROTECTED] wrote: I already thought about using a firewall rule. Although it could be quite difficult to get it right. As every malicious request blocks a slot for 5 minutes there hasn't got

Re: [EMAIL PROTECTED] How to prevent from simple DoS?

2007-11-19 Thread Ben Macintosh
2007/11/19, Joshua Slive [EMAIL PROTECTED]: On Nov 19, 2007 3:19 PM, Ben Macintosh [EMAIL PROTECTED] wrote: Thanks for pointing me to the right direction - never heard about AcceptFilter before. Interesting, because it is specifically suggested in the link that I sent you two days ago

[EMAIL PROTECTED] How to prevent from simple DoS?

2007-11-18 Thread Ben Macintosh
Hi I'm currently facing a problem which I can't find any help for. Every once in a while, my webserver doesn't respond to requests anymore, i.e. the browser simply keeps on loading but doesn't get any data. Using the status mod I found that in such a situation every possible slot is being used by