Looks like my home work has paid off some, but not all! ;-)
With the help from this group and my distro's forum, I was able to connect
with Ody-2 and to give it a static IP of 192.168.2.160/24, the default. I
got this far by connecting Ody into my ISP's router and accessing it via my
WIFI connection. I used HPSRProgrammer_v2_nopcap to discover Ody and to give
it its default static IP address, which is now permanently stored in it.
I was also able to comm with it using both ghpsdr and linhpsdr apps which
discovered it OK but I didn't try to work Ody because ghpsdr crashes with
a segfault, apparently due to some bug in the GUI, and the streaming rate
apparently not high enough via my WIFI.
Anyhow, the important thing is that I got somewhere! :-)
I then tried a direct connection to my computer's Ethernet port. After some
experimentation with settings, I can ping Ody OK and it is also listed by:
# nmap -sT 192.168.2.100/24
Starting Nmap 7.70 ( https://nmap.org ) at 2019-02-17 09:09 EET
Nmap scan report for 192.168.2.160 (192.168.2.160)
Host is up (0.00013s latency).
All 1000 scanned ports on 192.168.2.160 (192.168.2.160) are filtered
MAC Address: 00:1E:C0:A5:F4:7E (Microchip Technology)
Nmap scan report for 192.168.2.100 (192.168.2.100)
Host is up (0.00035s latency).
Not shown: 999 closed ports
PORT STATE SERVICE
22/tcp open ssh
Nmap done: 256 IP addresses (2 hosts up) scanned in 31.27 seconds
# ping 192.168.2.160
PING 192.168.2.160 (192.168.2.160) 56(84) bytes of data.
64 bytes from 192.168.2.160: icmp_seq=1 ttl=128 time=0.101 ms
64 bytes from 192.168.2.160: icmp_seq=2 ttl=128 time=0.190 ms
64 bytes from 192.168.2.160: icmp_seq=3 ttl=128 time=0.194 ms
64 bytes from 192.168.2.160: icmp_seq=4 ttl=128 time=0.165 ms
64 bytes from 192.168.2.160: icmp_seq=5 ttl=128 time=0.166 ms
64 bytes from 192.168.2.160: icmp_seq=6 ttl=128 time=0.192 ms
--- 192.168.2.160 ping statistics ---
6 packets transmitted, 6 received, 0% packet loss, time 143ms
rtt min/avg/max/mdev = 0.101/0.168/0.194/0.032 ms
However, alas, all above apps (HPSRProgrammer, ghpsdr, linhpsdr) will not
discover Ody so again I am stuck.
So, any new hints/advise will be much appreciated, I just can't give up on