Show HN: Port Zero – how I learned to stop worrying and love PORT=0

Per Hacker News, a new open-source tool called Port Zero eliminates a common dev headache: port conflicts. Instead of fighting over port numbers, developers name their services with subdomains. The creator built it after wasting hours in a dev environment where the frontend connected to the wrong backend version due to a port mix-up. The tool watches for tagged processes and creates virtual network interfaces mapping subdomains—like myapp-main.portzero.local—to the OS-assigned port. Multiple services can then run on the same port without conflict, distinguished only by subdomain. It also adds local HTTPS via custom certificate authorities and supports cloud tunnels to access services on other machines.

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