Our AV equipment gets moved to different venues and thus has different wan networks it is plugged into for internet, hardly ever having a public IP. A Ubiquiti Edgerouter acts as a Firewall, DHCP Server, Wireguard VPN, and allows Routing between the internal subnets. The problem is when the wan network (typically a convention center or university) conflicts with one of our internal networks, it wrecks the routing table as both networks are directly connected. Is there any way to avoid routing conflicts in these situations?
I've avoided common default networks (192.168.1.0, 10.0.0.0, etc.) But occasionally it does conflict. I'm currently using 192.168.10.0-192.168.40.0 (all /24), and that is usually good. I wanted to transition to 10.100.0.0-10.200.0.0 for other reasons, but those I've found are even more common.
One way could be to double nat with a consumer router upstream of the Edgerouter, but this is kludgey and confusing in most cases.
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