Hi Stormchaser, after some more experimentation I think the problem is that the server’s IP address may be blocked. I deduced this by successfully connecting to Raspberry Shake FDSNWS Implementation from another server that is managed by the same organization, and thus should have the same firewall, etc. settings.
Is it possible for you to review/unblock my IP address? It may be easiest to follow up on this via email (rather than the public forum). I have downloaded a large amount of RS data for a research project, although I tried to do so in a way that would be minimally disruptive to your servers–clearly my precautions were not enough, and I’m happy to adopt any recommendations you might have to avoid getting blocked again. Apologies for this!