doppler login failing with EOF errors on a new Mac: check your network filter

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If doppler login fails almost immediately with EOF errors on api.doppler.com but your network otherwise works, run this sanity check first: curl -v 'https://api.doppler.com/v3/projects'. If that looks healthy, the problem is almost certainly something intercepting your traffic locally, like a corporate network filter or proxy, which is exactly what caused this issue. The CLI polls /v3/auth/cli/authorize every 2 seconds while you complete the browser step, and a filter that kills repeated connections produces these EOFs. As a workaround while you sort the network, grab a personal token from the dashboard (Tokens, Personal tab) and load it with pbpaste | doppler configure set token. That bypasses the browser polling entirely.

Source: gh:DopplerHQ/cli#362 (Doppler)

In gh:DopplerHQ/cli#362, the issue was: A fresh brew install on an M1 Mac failed doppler login with repeated "Post https://api.doppler.com/v3/auth/cli/authorize: EOF" errors, plus the same EOF on the analytics POST. The maintainer walked through diagnostics: direct curls to the API worked fine, so the API was healthy, and the reporter could not make even curl fail when run every two seconds. The workaround offered was a personal token via pbpaste | doppler configure set token. In the end the reporter found the cause: a buggy network filter installed by their company. The maintainer confirmed the diagnosis.. The verified answer: If doppler login fails almost immediately with EOF errors on api.doppler.com but your network otherwise works, run this sanity check first: curl -v 'https://api.doppler.com/v3/projects'. If that looks healthy, the problem is almost certainly something intercepting your traffic locally, like a corporate network filter or proxy, which is exactly what caused this issue. The CLI polls /v3/auth/cli/authorize every 2 seconds while you complete the browser step, and a filter that kills repeated connections produces these EOFs.. Issue URL: https://github.com/DopplerHQ/cli/issues/362