*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT DROP [0:0]
:FIREWALL DROP [0:0]
:LO ACCEPT [0:0]
:TCP DROP [0:0]
:UDP DROP [0:0]
:LOGNDROP DROP [0:0]
-A INPUT -j FIREWALL
-A FORWARD -j FIREWALL

-A FIREWALL -m state --state INVALID -j DROP
-A FIREWALL -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FIREWALL -m state --state NEW -p icmp --icmp-type echo-request -j ACCEPT
-A FIREWALL -m state --state NEW -i lo -j LO
-A FIREWALL -m state --state NEW -m tcp -p tcp -j TCP
-A FIREWALL -m state --state NEW -m udp -p udp -j UDP
-A FIREWALL -m state --state NEW -j LOGNDROP

-A LO -m tcp -p tcp --dport 22 -j ACCEPT
-A LO -m tcp -p tcp --dport 25 -j ACCEPT
-A LO -m udp -p udp --dport 161 -j ACCEPT

-A TCP -m tcp -p tcp --dport 22 -j ACCEPT
-A TCP -m tcp -p tcp --dport 25 -j ACCEPT
-A TCP -m tcp -p tcp --dport 5432 -j ACCEPT
-A TCP -m tcp -p tcp -j LOGNDROP

-A UDP -m udp -p udp --dport 161 -j ACCEPT
-A UDP -m udp -p udp -j LOGNDROP

-A LOGNDROP -m limit --limit 2/min -j LOG --log-prefix "IPTables Packet Dropped: " --log-level 7
-A LOGNDROP -j REJECT --reject-with icmp-host-prohibited

-A OUTPUT -m state --state INVALID -j DROP
-A OUTPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A OUTPUT -o lo -j ACCEPT
-A OUTPUT -o eth0 -p icmp -m state --state NEW -j ACCEPT
-A OUTPUT -o eth0 -p tcp -m state --state NEW -j ACCEPT
-A OUTPUT -d 192.168.0.0/16 -o eth0 -m state --state NEW -j ACCEPT
COMMIT