Security Basics mailing list archives
RE: Server blocks access of IP after nmap scan
From: Dan Lynch <DLynch () placer ca gov>
Date: Wed, 18 May 2011 10:34:10 -0700
so i guess after the nmap scan the server somehow protected itself by blocking access to the site for my ip. I would like to know what I can do in this case, how I can successfully complete a nmap scan without putting it 'down'.
First make sure this is within the acceptable use guidelines of your ISP and the server owner's ISP. If it's not, you'd best knock it off. But if it is, there's likely an active IPS somewhere in your path to the server. Use nmap's timing options (either -T or -max-rate)to go "low-and-slow" and avoid triggering the IPS. You don't know what the IPS thresholds are set to, so be conservative, and be patient -- this will take a while. An idle/zombie scan is inherently slower, but still subject to rate-based IPS alerts. You protect your real IP address from the target, but the zombie will get blocked if it triggers the IPS. Dan Lynch, CISSP Information Technology Analyst County of Placer Auburn, CA ------------------------------------------------------------------------ Securing Apache Web Server with thawte Digital Certificate In this guide we examine the importance of Apache-SSL and who needs an SSL certificate. We look at how SSL works, how it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates. http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1 ------------------------------------------------------------------------
Current thread:
- Server blocks access of IP after nmap scan amon . amarth9 (May 18)
- Re: Server blocks access of IP after nmap scan Ken Fox (May 18)
- Re: Server blocks access of IP after nmap scan Thomas Rozenbroek (May 18)
- Re: Server blocks access of IP after nmap scan pasquale imperato (May 18)
- Re: Server blocks access of IP after nmap scan anthony kasza (May 18)
- RE: Server blocks access of IP after nmap scan Dan Lynch (May 18)
- Re: Server blocks access of IP after nmap scan Martin Schneider (May 18)
- Re: Server blocks access of IP after nmap scan Saif El Sherei (May 18)
- RE: Server blocks access of IP after nmap scan Rishi Narang (May 18)
- <Possible follow-ups>
- Re: RE: Server blocks access of IP after nmap scan amon . amarth9 (May 18)
- Re: Server blocks access of IP after nmap scan Joseph Saselli (May 18)
- Re: Server blocks access of IP after nmap scan Luciano Mazzella (May 18)
- Re: RE: Server blocks access of IP after nmap scan phyco . rootelement (May 18)
- Re: RE: Server blocks access of IP after nmap scan TAS (May 18)
- Re: Server blocks access of IP after nmap scan amon . amarth9 (May 18)
- Re: Server blocks access of IP after nmap scan Littlefield, Tyler (May 18)
(Thread continues...)
- Re: Server blocks access of IP after nmap scan Ken Fox (May 18)