DDOS

Hi, since last week, my web server was attacked at port 80. The SNORT IDS detected T/TCP attacks. I applied the acl denies the sender's ip address, there is a firewall with NAT to the Internet, but there are users who need access to this web server.

How can I filter the packets 'good' or 'bad '?

If you have been able to identify the source and blocked him, then your other users should be fine (as long as you have not unintentionally blocked others).

You cannot filter packets 'good' or 'bad' until you determine what is good or bad. As a starting point, you can use the white part and floods of Packet Tracer initially for you help determine the nature of the attack.

http://www.Cisco.com/warp/public/707/22.html

Jeff

Tags: Cisco Security

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