On 27/12/2020 14:49, Andy Burns wrote:
> Chris Green wrote:
>
>> So does just trying to connect *to* the device which has the data sim
>> dongle wake up the connection?
>
> A *little* bit more than that, a lot of 4G dongles still pretend to be
> modems, using e.g. ATDT*99# command to "dial" the connection, no
> dialling takes place, but it's a convenient lie to allow a PPP daemon to
> bring up the 4G connection and get an IP addr etc.
>
>> It means one needs a dynamic DNS
>> service but that's not a big problem.
>
> That'll work, provided your mobile provider gives you a public IP
> address, not a private one that's NATed.
thats a very very big IF.

I run a few public websites and trawl through the logs have happened
when they have been DOSed

All IP ranges from mobile devices have been NATed. It is extremely rare
to find *anyone* actually not behind a NAT router - some big companies.

Obviously if YOU control the NAT router not the mobile ISP, and THAT has
a fixed IP address you can set up an inbound connection but not many
people do.

--
Future generations will wonder in bemused amazement that the early
twenty-first century’s developed world went into hysterical panic over a
globally average temperature increase of a few tenths of a degree, and,
on the basis of gross exaggerations of highly uncertain computer
projections combined into implausible chains of inference, proceeded to
contemplate a rollback of the industrial age.

Richard Lindzen

--- SoupGate-Win32 v1.05