Another reason (other than using the numbers for cash) that I can see is that they might better help decipher where an attack that made it through the filters came from. If you only have the few packets that made it through to use to backtrack to an attacker, it may be harder to find them. But, of course, without the right data filters, finding the pattern in the chaos is near impossible sometimes... -------- Original Message -------- Subject: Odd scans and stuff bouncing off firewalls Date: Tue 8/13/2002 8:58 AM From: Nexus [nexusat_private-way.co.uk] To: incidentsat_private Just a quick straw poll to see if anyone has any hard data that supports the logging and analysis of traffic that bounces off of filtering devices as part of a business security plan ? Other than generating attack metrics to wave under the noses of senior managment at budget time, is there any definite _business_ requirement to have IDS sensors outside the firewall or firewall "drop" logs et al regularly examined in the context of "external" attack sources ? "We defended against X bazillion hack attacks last year so we need a bigger budget for more stuff.." BableFish (H2G2 version) : "Tons of port scans and worms from non accountable netblocks bounced off of the firewall" I don't bother to chase anything from anywhere unless it makes it through the filters because I could care less and it would IMHO purely be a time sink and even then only if it's from a netblock that has a whois abuse@ entry. As I said, this is purely my own view, on my own network knowing the sheer amount of background radiation on the internet, so I would appreciate some other points of view. Cheers. ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com ---------------------------------------------------------------------------- This list is provided by the SecurityFocus ARIS analyzer service. For more information on this free incident handling, management and tracking system please see: http://aris.securityfocus.com
This archive was generated by hypermail 2b30 : Tue Aug 13 2002 - 10:09:53 PDT