Opennebula shorewall/dnsmasq rules generator

This nodejs script generates

• shorewall DNAT (forward) rules based on configuration in VM USER_TEMPLATE
• dnsmasq config ip ranges and hosts based on mac addresses

How to define port forward rules in Opennebula VM.USER_TEMPLATE

port/protocol						ex. 80/tcp
										forwards tcp port 80 and default wan ip on gateway to port 80 on vm
									ex. 53/udp
										forwards udp port 53 and default wan ip on gateway to port 53 on vm

port,port,port/protocol				ex. 25,80,110/tcp
										forwards tcp ports 25,80,110 and default wan ip on gateway to ports 25,80,110 on vm

port:wan_ip/protocol				ex. 80:89.187.133.160/tcp
										forwards tcp port 80 and wan ip address 89.187.133.160 on gateway to port 80 on vm

port,port:wan_ip/protocol			ex. 80,443:89.187.133.160/tcp
										forwards tcp ports 80,443 and wan ip address 89.187.133.160 on gateway to ports 80,443 on vm

src_port:dest_port/protocol			ex. 1122:22/tcp
										forwards tcp port 1122 and default wan ip on gateway to port 22 on vm

src_port:wan_ip:dest_port/protocol	ex. 1122:89.187.133.160:22/tcp

										forwards tcp port 1122 and wan ip address 89.187.133.160 on gateway to port 22 on vm

More rules can be separated by pipe	ex. 1122:22/tcp|80/tcp|53/udp

Example

VM 201

VM 189

Generated shorewall DNAT rules

# Forward rules for VM ID: 189
DNAT		net		prv:10.0.1.1	tcp	27	-		89.187.133.167
DNAT		net		prv:10.0.1.1	tcp	29	-		89.187.133.167
DNAT		net		prv:10.0.1.1	udp	53	-		89.187.133.166
# Forward rules for VM ID: 201
DNAT		net		prv:10.0.1.2	tcp	25	-		89.187.133.166
DNAT		net		prv:10.0.1.2	tcp	26	-		89.187.133.166
DNAT		net		prv:10.0.1.2	tcp	27	-		89.187.133.166
DNAT		net		prv:10.0.1.2	tcp	29	-		89.187.133.166
DNAT		net		prv:10.0.1.2:22	tcp	1122	-		89.187.133.166