Review of 3 router network settings
Review of 3 router network settings
The initial nat handling from LTE is managed by paying for public IP, which means there isn't a direct issue there (or perhaps it's just forwarded differently). After that, there are two additional layers of NAT: one at the LTE router and another where the LTE router connects to the WAN port. I don’t need the second NAT layer because QoS requires internet access through the WAN port. Skipping the LTE router NAT is achieved by using a DMZ and directing the QoS router instead. DMZ essentially routes all traffic to a single IP address, similar to forwarding ports. It’s not exactly the same as connecting the QoS router directly to the internet, but it changes how the routing works compared to a straight connection.
I realized you meant to ask about QoS functionality beyond your router into the wider internet. QoS operates only where it receives acknowledgment on the local network.
You could simply include static routes. Then only the primary LTE router would handle NAT, once those routes are configured you can turn off NAT and firewall on the remaining devices.
It would need you to adjust your settings carefully. Your static IP is correct, but disabling NAT is preventing communication with the LTE router, causing connectivity issues and loss of internet access.
Without NAT the primary LTE router isn't aware of traffic going to the subnet behind the second router. It doesn't recognize its presence or know to route it through that second device. This setup applies generally—see the DdWRT guide for details.
I believe the LTE router won’t handle it well, should I be sure. The static route needs to be configured there and point to the QOS router. It seems the LTE device has limited settings.
If a low-quality TPLink router offered that feature, it would signal a serious warning if the LTE capability is missing...
Yes, it works with LTE since it supports the technology. The DMS should function properly, though you may need to check compatibility with your network setup.
It was easy to check whether the LTE router operated in bridge mode or IP pass-through mode. Doing so would integrate it into a regular modem, allowing you to connect your advanced router using QoS without additional NAT layers.