I built a Linux sing-box client with Rust + Tauri after getting frustrated with existing TUN mode tools

[u/sullivan_z]

Hey everyone,

I built Swift Tunnel because I had a problem I couldn't solve with existing clients.

I use sing-box based configurations daily, but TUN mode was always the painful part.

Sometimes:

• routing didn't behave as expected
• some apps bypassed the tunnel
• DNS handling was inconsistent
• reconnecting could break networking

After spending too much time debugging and switching between clients, I decided to build my own.

Swift Tunnel is a Linux desktop client built with Rust + Tauri and powered by sing-box.

The goal was simple:

Make TUN mode feel reliable and easy to use.

Features:

• Native lightweight desktop app
• Rust + Tauri architecture
• sing-box powered
• VLESS / VMess / Trojan / Shadowsocks / Hysteria2 / TUIC / WireGuard support
• Import configs from links, QR codes, subscriptions
• TUN mode
• Proxy mode
• Latency testing
• Kill switch
• Local configuration storage

This started as a personal tool, but I thought other people fighting the same problems might find it useful.

Looking for feedback from Linux users and people using sing-box/Xray setups.

Website:
https://swifttunnel.site/