Post by Hareesh Balakrishnan

If you’ve ever worked with large-scale test labs or telco environments, you know the pain: Your target device is buried 3 network hops deep behind firewalls, isolated VLANs, and custom lab PCs. As humans, we just type ProxyJump or chain ssh commands. But how do you make an automated, long-lived testing agent do this programmatically without breaking? I put together a deep dive into building deterministic, in-process multihop SSH routing using Python and Paramiko’s underlying primitives (direct-tcpip). Key takeaways: Why native OpenSSH config shortcuts fall short for programmatic pipelines. Moving from recursive inventory trees to flattened execution paths. Managing connection pooling and scope keys to prevent cross-talk. #SoftwareEngineering #DevOps #Python #SystemsEngineering #Automation