Hello to everyone
I'm reading "Iptables Tutorial 1.1.19" by Oskar Andreasoon, and I cant understand these bad packets rules
$IPTABLES -N bad_tcp_packets
#
#
# bad_tcp_packets chain
#
$IPTABLES -A bad_tcp_packets -p tcp --tcp-flags SYN,ACK SYN,ACK \
-m state --state NEW -j REJECT --reject-with tcp-reset
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j LOG \
--log-prefix "New not syn:"
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state --state NEW -j DROP
someone could explain me why that are bad tcp packets?
Thanks
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