Freesco, NND, CDN, EOS

iptables -N check-flags
iptables -F check-flags
iptables -A check-flags -p tcp --tcp-flags ALL FIN,URG,PSH -m limit \
--limit 5/minute -j LOG --log-level alert --log-prefix "NMAP-XMAS:"
iptables -A check-flags -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP
iptables -A check-flags -p tcp --tcp-flags ALL ALL -m limit --limit \
5/minute -j LOG --log-level 1 --log-prefix "XMAS:"
iptables -A check-flags -p tcp --tcp-flags ALL ALL -j DROP
iptables -A check-flags -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG \
-m limit --limit 5/minute -j LOG --log-level 1 --log-prefix "XMAS-PSH:"
iptables -A check-flags -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP
iptables -A check-flags -p tcp --tcp-flags ALL NONE -m limit \
--limit 5/minute -j LOG --log-level 1 --log-prefix "NULL_SCAN:"
iptables -A check-flags -p tcp --tcp-flags ALL NONE -j DROP
iptables -A check-flags -p tcp --tcp-flags SYN,RST SYN,RST -m limit \
--limit 5/minute -j LOG --log-level 5 --log-prefix "SYN/RST:"
iptables -A check-flags -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
iptables -A check-flags -p tcp --tcp-flags SYN,FIN SYN,FIN -m limit \
--limit 5/minute -j LOG --log-level 5 --log-prefix "SYN/FIN:"
iptables -A check-flags -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP

echo "anty potrscan zaladowany"