These scripts create bridge interfaces, one for each DMZ.
Add this to /etc/network/interfaces :
source /etc/network/interfaces.d/*.conf
Create vlan18 for DMZ 18 :
sudo ./dmz-create.sh 18
Here is the result (with chosen addresses) :
35: vlan18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default
link/ether WW:ZZ:ZZ:ZZ:ZZ:ZZ brd ff:ff:ff:ff:ff:ff
inet 10.0.18.254/24 brd 10.0.18.255 scope global vlan18
valid_lft forever preferred_lft forever
inet6 fd00::12:ffff:ffff:ffff:fffe/64 scope global
valid_lft forever preferred_lft forever
inet6 fe80::ZZZZ:ZZff:feZZ:ZZZZ/64 scope link
valid_lft forever preferred_lft forever
Delete it with :
sudo ./dmz-delete.sh 18