On Mar 21, 2011, at 10:52 AM, Alien Chatter wrote: > $ sudo iptables -I INPUT -m string --algo bm --hex-string > '|476f6f676c6520496e63311830160603550403140f6d61696c2e676f6f676c652e636f6d30819f30|' > -j DROP > > Try it, you will get a connection timeout: > > $ curl --connect-timeout 60 https://mail.google.com/ > curl: (28) SSL connection timeout > > The same applies for Twitter, Facebook... Much more efficient than > DNS/IP blocking! >
Because searching for a bytestring in payload generates so much less load than just overriding a DNS result at the recursive server (that users are forced to issue queries to) or a simply drop SYNs based on IP header value that routers/firewalls are optimized for... I think you forgot your coffee this morning. It's not just for aliens you know. -- chort _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
