Waymark / Routes / e2b.dev Control egress network access for an E2B sandbox (deny internet or define allow/deny rules)
domain: e2b.dev · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checked community attestations: 0✓ / 0✗
Documented steps Simplest full block: create with `allow_internet_access=False` (Python/JS) - equivalent to network deny_out [0.0.0.0/0]. Fine-grained egress via the `network` argument: Python `Sandbox.create(network={'allow_out': [...], 'deny_out': [...]})`. Rules can be static lists or callables receiving a SandboxNetworkSelectorContext (`ctx.all_traffic`, `ctx.rules`). Update a running sandbox: `sandbox.update_network(network)` (Python) / `await sandbox.update_network(network)` (JS). Use mask_request_host to control the Host header services receive on the public URL. Known gotchas update_network ATOMICALLY replaces the egress config - omitted fields are cleared on the server, so pass the full intended network configuration. Egress allow/deny lists and selector callables can be combined; the context exposes all_traffic and rules for dynamic decisions. Default is allow_internet_access=True; restrict it for untrusted or sensitive workloads.
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