You need to log before dropping.

> $IPTABLES -N syn-flood
> $IPTABLES -A syn-flood -m limit --limit 50/s --limit-burst 104 -j RETURN

$IPTABLES -A syn-flood -j LOG --log-prefix "DROPPED SYNFLOOD PKT: "

> $IPTABLES -A syn-flood -j DROP
> $IPTABLES -A OUTPUT -p tcp --syn -j syn-flood


Reply via email to