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We want to use the RUT240 as a LTE Router. In a first step we configured the "mobile" access using ppp. In a second step we defined DynDNS.

As a result the RUT exports the local NAT-IP to the DynDNS provider. Configuring the "mobile" access utilizing QMI and NAT results in the same result, bridge and passthrough are no option.

Can somebody explain how to configure a "dynamic IP" instead of a "shared IP" following the terms in https://wiki.teltonika-networks.com/view/Private_and_Public_IP_Addresses using  mobile access for Internet connectivity?
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In the meantime I have progressed. The major problem results from the fact, that our LTE provider gives us a private IP and performs NAT. Thus the given IP is correct but can't be routed. I have changed the APN to a different host that provides public IPs (probably only 3G) and now the public IP can be reached fro the Internet.
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Hi,

Are there any issues left with your DDNS setup? After receiving public IP address from your operator, RUT240 should've exported correct IP address to DynDNS provider.

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Hi,

Just posting the comment into the answer section:

In the meantime I have progressed. The major problem results from the fact, that our LTE provider gives us a private IP and performs NAT. Thus the given IP is correct but can't be routed. I have changed the APN to a different host that provides public IPs (probably only 3G) and now the public IP can be reached fro the Internet.

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