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Forum Discussion
M6 and IP-passthrough with routable static IP
I have an M6 Pro (MR6550) and a T-Mobile business internet account, and I'm unable to use the M6 in passthrough mode. The M6 (the hotspot) does some pretty inexplicable things. Like ARP my firew...
My concern is that the ISP may believe that the device their network is connecting to has a public IP address that they have assigned to that connection and the Firewall believes that it has a different public IP address. If packets keep arriving through the M6 that are addressed to the ISP public IP, the Firewall will ignore them. The goal is to confirm what IP the ISP is sending packets to, and the only way to do that appears to temporarily put the M6 into the default router mode.
If someone misconfigures their firewall with the wrong IP address, prefix, and default gateway then this is going to fail no matter what... Doesn't matter if they're on Ethernet, cellular, DOCSIS, or whatever.