tethered
Your app's network firewall — in one function call.
What it does
A zero-dependency Python library that restricts outbound network access at runtime. Declare an allow list, and every socket call outside it is blocked — supply chain defense, AI agent guardrails, and test isolation in a single line of code.
Does a similar job
all alternatives →
- OSOpen Source WireGuard desktop client with Multi-Factor Authentication2024 · defguard.net · ▲22
- FSFence – Sandbox CLI commands with network/filesystem restrictionsJan 2026 · github.com · ▲78
Hi HN! Fence wraps any command in a sandbox that blocks network by default and restricts filesystem writes. Useful for running semi-trusted code (package installs, build scripts, unfamiliar repos) with controlled side effects, or even just blocking tools that phone home. > fence curl https://example.com # -> blocked > fence -t code -- npm install # -> template with registries allowed > fence -m -- npm install # -> monitor mode: see what gets blocked One use-case is to use it with AI coding agents to reduce the risk of running agents with fewer interactive permission prompts: >…
- OAOnetun – Access your WireGuard network from anywhere2021 · github.com · ▲92
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