Port forwarding through 2 routers

[howardmoon]

Having trouble port forwarding through a 4g modem/router and RT-AC68U to BlueIris.

4g modem/router (no bridge mode) 192.168.0.1
port 8029 forwarded to
RT-AC68U 192.168.0.2
subnet 192.168.1.x
port 8029 forwarded to 192.168.1.7

The 4g modem claims DDNS registration succeeded, the external address matches, pinging the name return the right external IP.

Just getting a long timeout. No helpful tools in the 4g modem.

 

[JDB]

You could install entware and then tcpdump to get a packet trace on the Asus and see if anything is getting through the 4G.


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[Vexira]

try static routes, or dmz of the second router

 

[howardmoon]

Just talked to 4GAS, the provider for my wireless internet, and their tech said T-Mobile and AT&T do not allow inbound connections without a static ip account. I wonder why the modem has DDNS and port forwarding, as it is strictly for cellular. Can anyone confirm this?

Edit: Just tried T-Mobile and they couldn't tell me. Sent me to the "top level" and no one had a clue and gave me no where else to turn.

 

[exepolis]

As Vexira said, you should try to DMZ the Asus router in the 4G router. I have the same situation, piece of s***t provided by the ISP, a Huawei B315-22s and has no bridge mode at all. My setup's:

4G > Huawei (192.168.8.1) > WAN port > RT-AC68U (192.168.10.1) > switch & APs

On Huawei went to DMZ and gave it a IP on the range of the subnet for the WAN port of the Asus, 192.168.8.100. And there you go. Double NAT "solved".

I think you can give it a try with the IPs you like. Remember, the subnet on the 4G router MUST be different from the subnet of the Asus.

Good luck

 

[JDB]

A lot of 4G ISP’s do carrier-NAT, in which case this will never work as your external IP is private already.

If that’s what they are doing you currently have triple NAT!


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[howardmoon]

Carrier-grade NAT it is.

Thanks to everyone. Boo to T-Mobile