Unnecessary network data traffic

[William B]

Hello! I've installed a standalone application in a Beaglebone Black and apparently the data traffic on the network has increased a lot. My customer could not prove that it was the BBB yet, but I believe it's not, since everything in it's a simple I/Os control, monitoring by a REST application made in NodeJS/Javascript, with the data being stored in MySQL database, everything installed in the BBB and without access to other external applications. BBB is connected to the network, but in theory, it should not be generating traffic.

Is there any reason for BBB to be generating data traffic unnecessarily?

Thanks.

[Robert Nelson]

Did you change the default password and atleast disable the root account?

Best to log into it and monitor the BBB to see if it's doing anything
other then what you setup..

Regards,

--
Robert Nelson
https://rcn-ee.com/

[William B]

Yes, I changed the default password for debian user and root user, but I didn't disable either. Should I enable logging for everything or something specific?

Thanks!

[Dennis Lee Bieber]

On Tue, 14 Nov 2017 09:28:16 -0800 (PST), William B
<wbbe...@gmail.com> declaimed the
following:

Before making changes to the BBB -- which itself may cause a change in
behavior -- I'd suggest using some network computer to run WireShark
looking for packets from/to whatever IP the BBB has been assigned. Granted,
that may require a loose switch somewhere to route all such packets to the
computer.

Is WireShark available for ARM Linux? You could run it /on/ the BBB
capturing all packets from/to the BBB locally, then examine the capture
file (off-line, on another computer) for anything that looks suspicious.
--
Wulfraed Dennis Lee Bieber AF6VN
wlf...@ix.netcom.com HTTP://wlfraed.home.netcom.com/

[William B]

Good idea! I'll try this and post again if I can observe something suspicious.

Thanks

[Dennis Lee Bieber]

On Tue, 14 Nov 2017 18:02:03 -0800 (PST), William B
<wbbe...@gmail.com> declaimed the
following:

>Good idea! I'll try this and post again if I can observe something
>suspicious.
>Thanks

Quick Google revealed there are armhf builds -- though you might need
to connect a keyboard/mouse and HDMI monitor to the BBB (you don't want to
add X-window forwarding to the network traffic <G>) to run natively on the
device (or figure out how to run the capture process from a command line).