Introducing TorrentLock — The Torrent Client That Can't Leak Your IP

If you torrent, you need a VPN. But even with a VPN running, most torrent clients have a critical weakness: they don't guarantee your traffic actually stays inside the VPN tunnel. If your VPN drops for even a split second, your real IP address can leak to every peer in the swarm.

That's why we built TorrentLock — a secure BitTorrent client for macOS that makes VPN protection mandatory, not optional.

What Makes TorrentLock Different?

Every other torrent client treats VPN protection as a setting you might configure. TorrentLock treats it as a requirement. The app literally won't let you download anything unless PremierVPN is connected.

Mandatory VPN Gate

When you launch TorrentLock, it checks for an active PremierVPN connection. If your VPN isn't running, you'll see a gate screen — no torrent operations are possible. This isn't a warning you can dismiss. It's a hard block that protects you from accidentally torrenting on your real IP.

TorrentLock detects PremierVPN by process name, bundle identifier, and tunnel interface. It polls every 3 seconds, so the moment your VPN connects, TorrentLock is ready.

Interface Binding — The Gold Standard

Other clients let you optionally bind to a VPN interface. TorrentLock does it automatically and by default. All libtorrent traffic — downloads, uploads, DHT queries, tracker announces — is bound to the VPN tunnel interface using the outgoing_interfaces and listen_interfaces settings.

What does this mean in practice? Even if the kill switch has a brief delay, there is physically no network path for your torrent traffic to take except through the VPN. Packets can't route through your default gateway because the socket is bound to the VPN adapter only.

Kill Switch — Instant Protection

If PremierVPN disconnects for any reason — server maintenance, network change, accidental disconnect — TorrentLock responds immediately:

1. All active transfers pause within milliseconds
2. Resume data is saved to disk so nothing is lost
3. The VPN interface binding is released
4. No traffic leaks — the kill switch and interface binding work together

When PremierVPN reconnects, TorrentLock detects the new tunnel, rebinds, and resumes all transfers automatically. Zero manual intervention required.

Built-in Privacy Verification

TorrentLock doesn't just protect you — it lets you verify that protection. The Privacy Check tab runs 8 automated tests before you download anything:

• External IP Check — confirms your public IP matches the VPN, not your ISP
• VPN Connection — verifies PremierVPN is active
• Interface Binding — confirms all traffic routes through the VPN adapter
• IP Leak Detection — flags if your external IP matches your local IP
• Protocol Encryption — checks PE/MSE encryption mode
• Kill Switch Status — verifies the kill switch is armed
• DHT Exposure — ensures DHT queries route through the VPN
• Active Peer Audit — shows how many peers can see your current IP

Run this before every session and you'll know — not hope, know — that your traffic is secure.

Performance That Doesn't Compromise

TorrentLock is built on libtorrent-rasterbar 2.0.10, the same battle-tested engine behind qBittorrent and Deluge. We've tuned it for aggressive performance:

• Connection speed set to 200 for rapid peer acquisition
• 8 async I/O threads for disk operations
• 512KB send buffer watermarks for sustained throughput
• Simultaneous tracker and tier announces
• Auto-tuned disk cache based on your available RAM
• DHT with 5 bootstrap nodes for fast magnet link resolution

All while maintaining zero-leak VPN protection.

Everything Else You'd Expect

Beyond the VPN features, TorrentLock is a full-featured torrent client:

• Magnet links and .torrent files with drag-and-drop
• Sequential downloading for streaming media files
• RSS feeds with keyword and regex auto-download rules
• Per-torrent speed limits and connection limits
• File-level priority (skip, low, normal, high)
• Queue management with configurable active limits
• Label system for organisation
• Web portal at localhost:9092 for browser-based management
• Command line interface with live watch mode
• Protocol encryption (PE/MSE) to prevent ISP detection

Zero Telemetry

TorrentLock collects no data whatsoever. No analytics, no crash reporting, no usage tracking. Resume data is stored locally in Application Support. The web portal binds to localhost only. Your torrent activity stays on your machine.

Get TorrentLock

TorrentLock is free for all PremierVPN subscribers. It requires macOS 14.0+ (Sonoma or Tahoe) and runs natively on both Apple Silicon and Intel Macs.

Download TorrentLock →

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