One option would just be a straight telnet session (swap 10.10.10.10 with the IP address of your system):

telnet 10.10.10.10 1972

If the port is closed, you should get the error: "telnet: Unable to connect to remote host: Connection refused" - but if successful you should get the "Connected to 10.10.10.10" you'll know it's open. To exit, type <CTRL>] for a telnet prompt, then type 'quit'.

Hope this helps!

Robert,

I'm not sure if this helps your particular situation, but if it's "OK" to manually tell your container what the local hostname of the host is, then you could try this:

set ip=$SYSTEM.INetInfo.HostNameToAddr("**local_name_NotFQDN**")

with just the local hostname (not the FQDN) of the host machine in quotes... and that should give you the IP address of the active ethernet/wireless adapter. I tried this in a container running IRIS on a Raspberry Pi and the local hostname is "Iris2" (so, it is running Linux, I don't have any container systems running on Windows... sorry!) and this is what I got:

USER> Set ip=$SYSTEM.InetInfo.HostNameToAddr("Iris2")
USER> zw ip
ip="192.168.1.236"

On my network, 172.17.0.x is the internal Docker bridge, 192.168.1.x is my wireless network, and 10.1.2.x is my desktop wired network. (I have many servers, printers & whatnot, so I have multiple VLANs on my home network.) Now... I'm not sure if this is good or bad for your situation, but in my example, if I were to shutdown the container, disable the wireless, hook up an ethernet cable to the network and restart everything, the listed IP from this command would change from the 192.168.1.x to a 10.1.2.x IP address. This could be good if you wanted to know how the main machine was externally connected; or it could be bad if you're using awk/grep/findstr on logs looking for a particular IP. As I said, I'm unsure of your actual use case, so if this had to be portable across several containers and several machines unchanged, this may not help you as you'll manually have to change the machine name in your code.

Hope this helps!