On 27/12/20 11:40 pm, Chris Green wrote:
I want to be able to connect to a remote BBB which doesn't have
reliable WiFi available. The obvious approach would seem to be a
3G/4G USB dongle and a SIM with a data allowance.
However I can't seem to find any information about using a mobile data
dongle for*incoming* connections, can anyone point me at anything
useful.
I'm a bit confused as to why a peripheral would want to establish an
inbound connection to its host?
Normally, the dongle is just forwarding packets backwards and forwards
in a largely stateless manner, and things like TCP connections are "the
host's problem".
Making an inbound connection from another host on the Internet to the
4G-connected host is simply a matter of the 4G-connected host having a
publicly routed IP address known to the connecting party at the time of
the connection.
If the 4G dongle only provides a private IP address, then you'll need to
configure the NAT gateway in between to forward the connection.
If that NAT gateway is outside your control (e.g. at your ISP), then
your only option is to "tunnel" the connection by having the
4G-connected host establish an outbound connection to some publicly
accessible point (*in* your control) which can forward the traffic down
the tunnel to your host.
--
Stuart Longland (aka Redhatter, VK4MSL)
I haven't lost my mind...
...it's backed up on a tape somewhere.
--
For more options, visit http://beagleboard.org/discuss
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