Shadowsocks

Shadowsocks is a lightweight open-source proxy program from the developer clowwindy. Requests are encrypted first and then delivered to a proxy server, which relays them to the destination — so your real address is never exposed along the way.

• Transport model: Data travels over an encrypted Socks5 link to a relay that fetches the target resource.
• Cipher support: AES, ChaCha20 and other algorithms keep the stream private and unmodified.
• Easy to join: Self-hosted boxes and public servers both work with the same client setup.

Where Shadowsocks and FlClash Meet

The two layers are different but complementary — SS supplies the connection, FlClash supplies the console:

• Native parsing: FlClash reads Shadowsocks subscriptions directly and schedules nodes through rule groups.
• Expanded toolbox: Alongside SS tunnels, FlClash mixes protocols, benchmarks latency, and splits traffic by rules.
• Friendly workflow: Adding an SS node is a matter of pasting parameters into the UI — no manual editing.

All things considered, Shadowsocks owns the bottom-layer proxy capability, and FlClash brings upper-layer management, so together they handle demanding network scenarios with ease.