Jul 01 2009

[Linux, FreeBSD] Using netstat and ipfw to manually detect and blacklist DOSers on FreeBSD

Category: Articles,Linux administrationFractalizeR @ 1:22 pm

This is just an addition to my this article with some corrections needed if you use FreeBSD.

netstat command should look like

netstat -ntu -f inet| awk '{print $5}' | cut -d. -f1-4 | sort | uniq -c | sort -nr|more

And firewall IP blocking command should be

ipfw add deny all from xxx.xxx.xxx.xxx to any in

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