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Hulios: eBPF-Powered Tor Gateway Secures Linux Outbound Traffic
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Hulios: eBPF-Powered Tor Gateway Secures Linux Outbound Traffic

Hulios is a new eBPF-powered tool that automatically routes all TCP sockets and DNS queries through the Tor network, enhancing security for developers working with sensitive data. It works by embedding an Arti (Tor client) instance and a Hickory-based DNS resolver without modifying runtime configurations or relying on external firewall daemons. The entry point supervisor runs as root to hook eBPF programs and build policy routing tables before dropping privileges in the worker process. This setup ensures robust leak-resistant boundaries, making it ideal for environments where security is paramount but configuration changes are undesirable. Hulios requires Linux Kernel 5.10 or higher with specific BPF features enabled.

Jul 28, 2026 · 3 min read

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