Re: USB-serial adapter suggestions needed

On Fri, Jan 12, 2024 at 09:49:47PM -0800, Mark Millard wrote:
> On Jan 12, 2024, at 17:52, bob prohaska <fbsd@www.zefox.net> wrote:
> > 
> > While checking, I logged in as root on the serial consoles of each host.
> > When I tried to log in to www.zefox.net the response was
> 
> This and http://www.zefox.net/~fbsd/tiptrouble/corrupt_mac do not
> make clear the full chain of connections. In fact the presentation
> seems inconsistent with other information so various things may
> have changed.
> 
> Some context based on prior (out of date?) information:
> 
>   |-50.1.20.30 ns1.zefox.net Pi2 12.3 armv7 ftdi usb-serial----50.1.20.27
>   |-50.1.20.29 ns2.zefox.net Pi2 12.3 armv7 2303 usb-serial----50.1.20.30
>   |-50.1.20.27 www.zefox.net Pi2 12.3 armv7 2303 usb-serial----50.1.20.26
> 
> Was "pi4 RasPiOS workstation" involved as a starting place? If so, what
> sequence gets to www.zefox.net from there? 

Yes, the login sequence starts from a shell on pi4 RapiOS 
workstation, via ssh  to the terminal server where tip is run 
to access the usb-serial adapter plugged into it.

> 
> Starting with what you showed via:
> 
> http://www.zefox.net/~fbsd/tiptrouble/corrupt_mac
> 
> (not knowing how you got there) . . .
> 
> QUOTE
> FreeBSD/arm (www.zefox.net) (ttyu0)
> 
> login: root
> Password:
> Corrupted MAC on input.
> ssh_dispatch_run_fatal: Connection to 50.1.20.29 port 22: message authentication code incorrect
> END QUOTE
> 
> 50.1.20.29 is supposedly ns2.zefox.net instead of www.zefox.net
> or ns1.zefox.net according to http://www.zefox.net/~fbsd/netmap .

The netmap was wrong. ns1 and ns2 were swapped....8-(  

> 
> The bugzilla material eventually needs to be updated with something
> that can be followed and noting the possible occasional hardware or
> software corruptions of material that end up going over Ethernet
> that are now demonstrated to be able to cause the symptoms that
> you have been seeing on occasion for so long.

The netmap is corrected, with a description of the login sequence
used to watch the serial consoles added. I _think_ it's
a bit clearer than before, if not please say so.

A readable (and correct) description of this setup is quite 
difficult to write.  Thanks very much for close reading and 
taking the trouble to point out my error(s)!

bob prohaska