When Curl Works But IntelliJ Doesn’t: The Ollama Connection Mystery

I run a bunch of internal services through Traefik on my LAN, each with a proper domain name and TLS, so I don’t have to remember ports. One of them is Ollama, sitting on a beefy gaming PC at 10.0.0.105 and exposed as ollama.tymscar.com. From the terminal everything behaved exactly as expected: fast responses, certificate valid, models listed. Then IntelliJ IDEA decided this host basically didn’t exist. The “Test Connection” button just said “Failed to connect”. No detail. No hint. Just a smug little red failure.