NOTE: You will not find the answer here. Instead look here: https://forum.opnsense.org/index.php?topic=18381.msg83553#msg83553 (https://forum.opnsense.org/index.php?topic=18381.msg83553#msg83553)
My LAN uses 192.168.1.0/24, and it works just fine for all hosts with this address range. The LAN gateway on my OPNsense firewall is 192.168.1.1. It all pretty much auto-configured itself, so I've not had to do much manual configuration.
I've added a new device to the network that insists on using 192.168.6.0/24. This device uses Ethernet-over-USB, and it's plugged into a Linux laptop whose WiFi is assigned via DHCP: 192.168.1.104. I understand that Ethernet-over-USB is indistinguishable from other Ethernet traffic, and requires no 'special handling'.
I think I've got the Linux laptop and its USB device configured properly: I can make an SSH connection from the Linux laptop to the USB device at 192.168.6.2. I can 'ping' the WiFi from the USB device on its 192.168.6.2 interface, and I can ping 192.168.6.2 from the Linux laptop.
My problem is that the devices on the 192.168.6.0/24 net cannot successfully make a connection to the Internet. In addition, I cannot successfully 'ping' the LAN gateway at 192.168.1.1 from the USB device at 192.168.6.0. I don't understand why this is so because the IPv4 rules on the LAN interface allow ALL sources (*). I've attached a screenshot so that's clear).
I am not sure if ALL sources includes packets with a source address from the 192.168.6.0/24 network or not??? This is a major point of confusion for me. I have searched in vain for anything in the OPNsense configuration GUI that would allow me to create or use this 192.168.6.0 network in a firewall rule. How is this done?... the 192.168.6.0/24 hosts are not directly connected to the OPNsense firewall - they are only connected to the Ubuntu host, and use its WiFi as the gateway to the 192.168.1.0/24 net.
Can someone explain what I need add to OPNsense to get Internet access for the USB device at 192.168.6.0/24? I've searched the OPNsense documentation, but found nothing relevant to this situation... but if I've missed something, I'd like to know that also.
Simple, they cannot see each other. the x.x..6.0 range will not talk to the *.*.1.0 range without either a gateway or a mask of 255.255.0.0. What make/model is the USB dongle, sounds like it's running in gateway mode rather than access point mode.
Quote from: marjohn56 on August 02, 2020, 03:42:13 PM
Simple, they cannot see each other. the x.x..6.0 range will not talk to the *.*.1.0 range without either a gateway or a mask of 255.255.0.0. What make/model is the USB dongle, sounds like it's running in gateway mode rather than access point mode.
I have a gateway - the WiFi interface in the Ubuntu host (see attachment, please). I've created a static route in OPNsense using this gateway. I can ping the OPNsense host at 192.168.1.1 from 192.168.6.2.
The "dongle" is a "pocketbeagle" running Debian: https://beagleboard.org/pocket (https://beagleboard.org/pocket). It runs its own DHCP server, and is configured to create its own network.