*nat
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]

-A PREROUTING -i eth0 -p tcp -m tcp --dport 50000 -j DNAT --to-destination 10.9.8.214:50000
-A POSTROUTING -o eth0 -j MASQUERADE

COMMIT

*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]

-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT

# Allow ICMP
-A INPUT -s 0.0.0.0/0 -i eth0 -p icmp -m limit --limit  1/s --limit-burst 1 -j ACCEPT
-A INPUT -s 10.9.8.0/255.255.255.0 -i eth1 -p icmp -j ACCEPT
-A INPUT -p icmp -m limit --limit 1/s --limit-burst 1 -j LOG --log-prefix PING-DROP:
-A INPUT -p icmp -j DROP
-A OUTPUT -p icmp -j ACCEPT

# SSH Delle
-A INPUT -i eth0 -p tcp --dport 22 -m state --state NEW -m recent --set --name SSH
-A INPUT -i eth0 -p tcp --dport 22 -m state --state NEW -m recent --update --seconds 60 --hitcount 3 --rttl --name SSH -j DROP
-A INPUT -i eth0 -p tcp -m tcp --dport 22 -j ACCEPT

# NTP Delle
-A INPUT -p tcp -m state --state NEW -i eth0 --dport 123 -j ACCEPT

# DHCP
-A INPUT -i eth1 -p tcp --sport 68 --dport 67 -j ACCEPT
-A INPUT -i eth1 -p udp --sport 68 --dport 67 -j ACCEPT
-A OUTPUT -o eth1 -p tcp -s 10.9.8.7 --sport 67 -d 255.255.255.255 --dport 68 -j ACCEPT
-A OUTPUT -o eth1 -p udp -s 10.9.8.7 --sport 67 -d 255.255.255.255 --dport 68 -j ACCEPT

-A INPUT -i eth0 -j DROP

# Loopback interface is valid.
-A OUTPUT -o lo -s 0.0.0.0/0  -d 0.0.0.0/0  -j ACCEPT

-A FORWARD -i eth0 -p tcp -m tcp --dport 50000 -m state --state NEW -j ACCEPT

# Logging af nye pakker skal startes
-A INPUT -m state --state NEW -j LOG --log-prefix -A-LOG --log-level 4
-A OUTPUT -m state --state NEW -j LOG --log-prefix -A-LOG --log-level 4

COMMIT