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accarda
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Joined: Fri Apr 05, 2019 4:06 pm
Location: Italy

SXT LTE6 passthrough info to control 2nd NAT ?

Thu Dec 31, 2020 9:37 am

Hello everyone,
I'd like to understand whether this is possible or not, without making too much tests, risking to lock myself out as SXT is on a pole and not easy to reach now.
However, currently, I have RoMON enabled and working on SXT and main router (would this always allows me to log into SXT if a screw something ?)

Today I have my SXT LTE6 setup without using passthrough and my provider gives me private IP on LTE interface.
Therefore I have 192.168.x.y on ETH1 -> 10.xx.yy.zz on LTE1 -> public IP.
For this reason while I can control the first level of NAT for LTE1, I can do nothing for the other NAT due to private IP assigned from provider.
By reading around I have seen that passthrough will remove one level and assign the IP directly to client (would be my main router RB4011) connected to ETH1 of SXT (in my case).
Does it mean that by applying passthrough, the RB4011 will get a public routable IP on its interface ?
Or will it get again, directly, the private IP 10.xx.yy.zz ???
I guess this depends on provider (APN and ISP profile) and so I guess even using passthrough it won't solve the problem of controlling inbound traffic with NAT rules to open ports, right ?
So if that's the case I guess it won't make any difference using/not using passthrough, beside eliminating one NAT level.

Thanks in advance for any info that you can share.
Armando

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