[641] feat(sandbox): preserve network isolation for MCP servers via CONNECT proxy#679
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decko wants to merge 2 commits into
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[641] feat(sandbox): preserve network isolation for MCP servers via CONNECT proxy#679decko wants to merge 2 commits into
decko wants to merge 2 commits into
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…lowed hosts When MCP servers are configured, the sandbox previously disabled network namespace isolation entirely so servers could reach external APIs. This wires go-arapuca's new AllowedHosts/CONNECT proxy support so that MCP servers declaring allowed_hosts in soda.yaml keep full network isolation while routing only declared traffic through the proxy. Servers without allowed_hosts fall back to the existing behavior (disable netns). Mixed configurations (some with, some without) also fall back to preserve backward compatibility. Closes #641 Assisted-by: Claude Opus 4.6
This was referenced Jul 21, 2026
This was referenced Jul 21, 2026
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Summary
AllowedHostsinto the sandbox runner so MCP servers declaringallowed_hostsinsoda.yamlkeep full network namespace isolation instead of disabling itarapuca_config_add_allowed_hostFFI from arapuca#46)How it works
When all MCP servers in a phase declare
allowed_hosts, the sandbox CONNECT proxy routes only that traffic while the agent remains fully network-isolated. Withoutallowed_hosts, falls back to the existing behavior (disable netns).Changes
config.MCPServerConfiggainsAllowedHosts []AllowedHosteffectiveUseNetNSkeeps netns when all servers have allowed hostscollectAllowedHostsaggregates and deduplicates across serversarapuca.Config.AllowedHostswired in sandbox runnerallowed_hostsdocumentationCloses #641
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