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Oh, I'm not that good actually and do not have spare resources at the moment, if you could give some good links on the topic, I would be very glad.
By the way, I'm using vnstat and iftop to evaluate traffic movement and they show me huge incoming traffic, although I know there should't be any. Can botnet attack generate it?
And one more issue, I've installed apf and wrote an access rule for 80 port, so that only specific countries could enter (took ranges from ip2country databases). At first I've noticed that traffic doesn't lower despite of the ACL-s, and then just to test I've removed 80 port from INGRESS section at all. And the site still remained accessible =-O I've did iptables -F and then apf -r and iptables -L - rules really are there, but they fo not block anything...
Or you have a BBS type website, or jarhead or mambo website or any type of Guesbook type website etc that has exploits on it and the guys are attacking the site ... hence why I think it is botnet attacks as well yes ... not fun ;-)