Andy Burns  wrote:
> Chris Green wrote:
>
> > Are there any simple 3G/4G add-ons for a Pi that will allow it to
> > power up into a mode where it has the ability to be connected to via
> > the mobile data connection?
>
> Not really, if the 4G connection is down, there's no remote way you can
> ask it to come up, you could do something custom like sending an SMS to
> the dongle (if the SIM supports SMS in addition to data) and have
> something running on the Pi to bring up the 4G connection in response
> (and maybe text you back the IP address it has)
>
> The other possible wrinkle is that even with the 4G connection up, it
> may be using CGNAT which doesn't allow inbound TCP connections, just
> outbound, so again you might homebrew something that brings up a VPN
> tunnel from the Pi end over the 4G, then you can connect though the
> tunnel ...

I already run ssh tunnels from the Pi (well it's a BBB actually) to
get through the NAT'ted WiFi connection so I can easily do the same to
use the 3G/4G.

--
Chris Green
·

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