@ashtonianagain said in Nested Pfsense over vlan - design and sanity check:
Which I think would make that a transit network?
Just because you tag it on the switch as 999 on 1 interface, but not another, but its still 192.168.1.. And you have hosts on this network.
Which means to stop something on your 10.42 network from talking to something your 192.168.1 network you have to block it there. Now since your natting and and if you don't do any port forwards 192.168.1. couldn't talk to 10.42 unless you did a port forward, and you would be asymmetrical if you didn't do host routing on the 192.168.1.x device. And the downstream router would also be blocking source traffic from rfc1918 anyway.
Its a convoluted setup to be sure.. Just create a transit network on your edge pfsense, say 172.16.0.0/30 and put your downstream router wan on this network..
Here this is how you setup downstream routers.
pfsense-layer-3-switch.png