Mt vote is for dropping. You still sometimes hear from RFC purists bemoaning the fact that many block and drop certain ICMP packets at their router.
_____ From: [email protected] [mailto:[email protected]] On Behalf Of Norman Rach Sent: Thursday, October 08, 2009 3:42 PM To: [email protected] Subject: Re: [Pauldotcom] Drop or rst? Thanks everyone for your input. I'll add this to the agenda at our next meeting as discussion points. Cheers! NR _____ From: [email protected] To: [email protected] Subject: Drop or rst? Date: Wed, 7 Oct 2009 09:39:07 -0700 Hi Everyone, I'm currently in a discussion about our current ruleset for iptables. Whether to be RFC compliant and issue a RST to those scanning/connecting to undesired ports or to drop the packet completely. By sending a rst back to the host aren't we letting the srcIP know that the traffic successfully arrived to the host without being intercepted by a network appliance (i.e. IDS/IPS, firewall, etc)? As far as I can tell this seems to be more of a discussion on one's own security posture preference. Any feedback is appreciated. Cheers! NR _____ Hotmail: Powerful Free email with security by Microsoft. Get it now. <http://clk.atdmt.com/GBL/go/171222986/direct/01/> _____ Hotmail: Trusted email with Microsoft's powerful SPAM protection. Sign up now. <http://clk.atdmt.com/GBL/go/177141664/direct/01/> No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.421 / Virus Database: 270.14.8/2423 - Release Date: 10/08/09 18:33:00
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