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TCP probes test raw socket connectivity to a host:port, filling the gap for non-HTTP services like databases and caches. Uses stdlib socket.create_connection — no new dependencies. Adds CLI command, runner integration, unit tests, E2E test manifest, K8s example, SOC2 boundary protection example, and documentation.
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Pull Request Test Coverage Report for Build 22689564324Details
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Validates that Cilium network policies actually enforce TCP egress restrictions. Applies a policy allowing only port 443 to the K8s API, then asserts that allowed connections succeed and blocked ports are dropped — testing real policy enforcement, not just reachability.
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Summary
type: tcpprobe that tests raw TCP socket connectivity to host:portsocket.create_connection— no new dependenciesconnected(bool) anderror(string/null) in probe dataChanges
netcheck/checks/tcp.py— new TCP check modulenetcheck/runner.py— TCP dispatch case + default validation rulenetcheck/cli.py—netcheck tcpCLI commandtcp-job.yaml) + test fileoperator/examples/default-k8s/tcp.yaml)Test plan
netcheck tcp,netcheck tcp --host localhost --port 1)