#
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# rules.before
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#
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# Rules that should be run before the ufw command line added rules. Custom
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# rules should be added to one of these chains:
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# ufw-before-input
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# ufw-before-output
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# ufw-before-forward
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#
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# Don't delete these required lines, otherwise there will be errors
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*filter
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:ufw-before-input - [0:0]
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:ufw-before-output - [0:0]
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:ufw-before-forward - [0:0]
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:ufw-not-local - [0:0]
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# End required lines
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# allow all on loopback
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-A ufw-before-input -i lo -j ACCEPT
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-A ufw-before-output -o lo -j ACCEPT
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# connection tracking rules
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-A ufw-before-input -m state --state RELATED,ESTABLISHED -j ACCEPT
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# drop INVALID packets (logs these in loglevel medium and higher)
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-A ufw-before-input -m state --state INVALID -j ufw-logging-deny
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-A ufw-before-input -m state --state INVALID -j DROP
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# connection tracking for outbound
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-A ufw-before-output -p tcp -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
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-A ufw-before-output -p udp -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
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# ok icmp codes
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-A ufw-before-input -p icmp --icmp-type destination-unreachable -j ACCEPT
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-A ufw-before-input -p icmp --icmp-type source-quench -j ACCEPT
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-A ufw-before-input -p icmp --icmp-type time-exceeded -j ACCEPT
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-A ufw-before-input -p icmp --icmp-type parameter-problem -j ACCEPT
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-A ufw-before-input -p icmp --icmp-type echo-request -j ACCEPT
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# allow dhcp client to work
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-A ufw-before-input -p udp --sport 67 --dport 68 -j ACCEPT
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#
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# ufw-not-local
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#
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-A ufw-before-input -j ufw-not-local
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# if LOCAL, RETURN
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-A ufw-not-local -m addrtype --dst-type LOCAL -j RETURN
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# if MULTICAST, RETURN
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-A ufw-not-local -m addrtype --dst-type MULTICAST -j RETURN
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# if BROADCAST, RETURN
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-A ufw-not-local -m addrtype --dst-type BROADCAST -j RETURN
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# all other non-local packets are dropped
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-A ufw-not-local -m limit --limit 3/min --limit-burst 10 -j ufw-logging-deny
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-A ufw-not-local -j DROP
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# allow MULTICAST, be sure the MULTICAST line above is uncommented
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-A ufw-before-input -s 224.0.0.0/4 -j ACCEPT
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-A ufw-before-input -d 224.0.0.0/4 -j ACCEPT
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COMMIT
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# nat Table rules
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*nat
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:POSTROUTING ACCEPT [0:0]
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-A POSTROUTING -s 192.168.5.2/24 -o eth0 -j SNAT --to 192.168.5.105
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-A PREROUTING -p tcp -d 192.168.5.105 --dport 80 -i eth0 -j DNAT --to-destination 192.168.5.200:80
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# don't delete the 'COMMIT' line or these rules won't be processed
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COMMIT
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