On 2022-11-29 15:09, L A Walsh wrote:
I don't have an instance of a firewall or netfilter between local routes within my local network. I have, sorta, the opposite -- a 'bridge' to bind them to look like 1 local network, which pretty much ignores the mtu size. What do you mean by "bridge"? A bridge is essentially a 2 port switch.
It seems inefficient thought it might become necessary to use a firewall between 2 internal networks just to manage the mtu sizes between the two networks, arg!, but it is looking like that may be the only way.
You don't need a full firewall, just a router, something that Linux does very well. For example, you could set up a VLAN for your IoT and have that VLAN on your main LAN connection to your computer and then enable routing. That's it. What are you using for your firewall/router? Linux or some commercial box?