On Sat, Mar 08, 2008, Robin Becker wrote: >Sorry if this is too off topic, but I would like to find out what to do >when you suspect a possible dos attack on your system. I know there are >many experienced sysadmins here. >Although my system (freebsd 6.0/apache 2.0.x) did in fact hold up, what >steps should I be taking? The originating ip doesn't seem to be reverse >mappable.
The first thing to do is ``whois ipaddress'' which probably will identify the owner of the ip block. One can also identify name servers by reversing the octets in the IP address, then querying for the name server(s) responsible for the reverse dns. This if the IP address is 188.8.131.52, one would try the following searches until one returns something useful. dig 4.3.2.in-addr.arpa. ns dig 3.2.in-addr.arpa. ns dig 2.in-addr.arpa. ns The next step would be to attempt to contact the owners of the name servers. Bill -- INTERNET: [EMAIL PROTECTED] Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way FAX: (206) 232-9186 Mercer Island, WA 98040-0820; (206) 236-1676 We'll show the world we are prosperous, even if we have to go broke to do it. -- Will Rogers _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"