Hi @Quattro_Vageena the MG does act as a NAT gateway and as such it has a subnetting capability, you can easily define the subnet pool that will exist behind the MG on the Ethernet side.  The MG also provides you control over the DHCP configuration as well as fixed IP assignments for devices behind it if desired.  There is also a port forwarding configuration on MG which looks very familiar to MX port forwarding.  But note that the MG is not a true router/firewall in the sense I think you're asking.  Perhaps consider a Z3C appliance for this, which is less expensive than the MG21 anyway, and the Z3C (or the less expensie Z3 but with an external USB cellular dongle) provides you the firewalling and/or AutoVPN capabilities if needed.   ... View more