Hi Tim,
> > Can Laptop SSH into Third? Ditto above WRT w(1).
>
> Haven't got SSH set up for SSH logins from Laptop to Third, although I
> expect it to work as these machines can see each other on the network.
All you really need is a TCP server that gives a known response so you
can see the handshake worked and data was transferred; more work than
the DHCP that succeeds. SSH transfers quite a bit back and forth before
you're logged in, but a simple server can be created.
$ cat >mark
#! /bin/sh
hostname
date
$ chmod +x mark
Then to run it, listening on all interfaces on TCP port 12345,
and running that script on every connection:
$ socat tcp4-listen:12345,reuseaddr,fork exec:./mark
Use your client of choice to connect, e.g. telnet(1).
$ nc 127.1 12345
orac
2019-01-13 16:51:25 +0000 Sun
^D
$
$ nc 127.1 12345
orac
2019-01-13 16:52:05 +0000 Sun
^D
> OK, tried
>
> #ip neigh add 192.168.2.8 lladdr 00:24:d2:94:35:16 dev wlp1s0
> RTNETLINK answers: File exists
That suggests there was an (incomplete?) entry already and either
`replace' or `change' should be used.
> So looks like a poor Wifi signal on original connect may be a factor.
https://wiki.archlinux.org/index.php/Wifi says signal strength, without
a GUI queering the pitch, can be seen with `iw dev interface station
dump'.
Perhaps there's a new source of occasional interference?
Cheers, Ralph.
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