# Chain to contain all the rules relating to bad TCP flags
/sbin/iptables -N BADTCP
+ #Don't check loopback
+ /sbin/iptables -A BADTCP -i lo -j RETURN
+
# Disallow packets frequently used by port-scanners
# nmap xmas
/sbin/iptables -A BADTCP -p tcp --tcp-flags ALL FIN,URG,PSH -j PSCAN
/sbin/iptables -A REDINPUT -p udp --source-port 67 --destination-port 68 -i $IFACE -j ACCEPT
fi
- # Outgoing masquerading
+ # Outgoing masquerading (don't masqerade IPSEC (mark 50))
+ /sbin/iptables -t nat -A REDNAT -m mark --mark 50 -o $IFACE -j RETURN
/sbin/iptables -t nat -A REDNAT -o $IFACE -j MASQUERADE
fi
# CUSTOM chains, can be used by the users themselves
/sbin/iptables -N CUSTOMINPUT
/sbin/iptables -A INPUT -j CUSTOMINPUT
+ /sbin/iptables -N GUARDIAN
+ /sbin/iptables -A INPUT -j GUARDIAN
+ /sbin/iptables -A FORWARD -j GUARDIAN
/sbin/iptables -N CUSTOMFORWARD
/sbin/iptables -A FORWARD -j CUSTOMFORWARD
/sbin/iptables -N CUSTOMOUTPUT
/sbin/iptables -A OUTPUT -j CUSTOMOUTPUT
/sbin/iptables -N OUTGOINGFW
+ /sbin/iptables -N OUTGOINGFWMAC
/sbin/iptables -A OUTPUT -j OUTGOINGFW
/sbin/iptables -t nat -N CUSTOMPREROUTING
/sbin/iptables -t nat -A PREROUTING -j CUSTOMPREROUTING
/sbin/iptables -A FORWARD -j IPSECFORWARD
/sbin/iptables -A FORWARD -j OPENSSLVIRTUAL -m comment --comment "OPENSSLVIRTUAL FORWARD"
/sbin/iptables -A OUTPUT -j IPSECOUTPUT
- #/sbin/iptables -t nat -N IPSECNAT
- #/sbin/iptables -t nat -A POSTROUTING -j IPSECNAT
+ /sbin/iptables -t nat -N IPSECNAT
+ /sbin/iptables -t nat -A POSTROUTING -j IPSECNAT
# Outgoing Firewall
- /sbin/iptables -A FORWARD -j OUTGOINGFW
+ /sbin/iptables -A FORWARD -j OUTGOINGFWMAC
# localhost and ethernet.
- /sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
+ /sbin/iptables -A INPUT -i lo -m state --state NEW -j ACCEPT
/sbin/iptables -A INPUT -s 127.0.0.0/8 -m state --state NEW -j DROP # Loopback not on lo
/sbin/iptables -A INPUT -d 127.0.0.0/8 -m state --state NEW -j DROP
- /sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT
+ /sbin/iptables -A FORWARD -i lo -m state --state NEW -j ACCEPT
/sbin/iptables -A FORWARD -s 127.0.0.0/8 -m state --state NEW -j DROP
/sbin/iptables -A FORWARD -d 127.0.0.0/8 -m state --state NEW -j DROP
/sbin/iptables -A INPUT -i $GREEN_DEV -m state --state NEW -j ACCEPT ! -p icmp
# upnp chain for our upnp daemon
/sbin/iptables -t nat -N UPNPFW
/sbin/iptables -t nat -A PREROUTING -j UPNPFW
-
+ # This chain only contains dummy rules.
+ /sbin/iptables -N UPNPFW
# Custom mangle chain (for port fowarding)
/sbin/iptables -t mangle -N PORTFWMANGLE