🚀 One-Line Installation (Network Optimizer Script)

Just run this in your terminal (works on root or non-root):

bash <(curl -fsSL https://raw.githubusercontent.com/emadtoranji/NetworkOptimizer/main/optimize.sh)

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✨ Features

• ✅ Enables Google's BBR congestion control (tcp_bbr) — BBRv2 if using a patched kernel, otherwise defaults to BBRv1
• ✅ Configures fq queueing discipline for optimal performance
• ✅ Enables TCP Fast Open, MTU probing, and aggressive memory windows
• ✅ Safe for production environments
• ✅ Writes clean configurations to /etc/sysctl.d/
• ✅ No external dependencies or systemd required
• ✅ Easy to install and uninstall
• ⚠️ BBRv2 is not enabled by default in Linux. It requires a patched kernel such as BBRv2 backports.

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🔧 Requirements

• 🐧 Linux Kernel 5.4 or higher (recommended: 5.10+ for full BBRv2 support)
• 🔐 Root or sudo access
• 💡 bash shell (pre-installed on all major Linux distributions)

To check your kernel version:

uname -r

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🔍 Verify BBR Activation (BBRv1 or v2, depending on kernel)

After running the script, confirm BBR is active (usually BBRv1 unless you use a custom kernel with BBRv2 patches):

1. Check TCP congestion control:

   sysctl net.ipv4.tcp_congestion_control

   Expected output:

   net.ipv4.tcp_congestion_control = bbr
   

2. Verify BBR module:

   lsmod | grep bbr

   Expected output:

   tcp_bbr                20480  1
   

3. Inspect active TCP sessions:

   ss -tin

   Look for bbr in the congestion control field.

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🧠 How It Works

While this script enables BBR (tcp_bbr), Linux does not currently offer a user-selectable distinction between BBRv1 and BBRv2. Most systems will run BBRv1 unless a custom kernel with BBRv2 support is used.

The script performs the following:

• Loads the tcp_bbr kernel module
• Configures module auto-loading on boot
• Creates /etc/sysctl.d/99-bbrv2.conf with optimized settings:

  net.core.default_qdisc=fq
  net.ipv4.tcp_congestion_control=bbr
  net.ipv4.tcp_notsent_lowat=16384
  net.ipv4.tcp_fastopen=3
  net.ipv4.tcp_mtu_probing=1
  net.ipv4.tcp_slow_start_after_idle=0
  net.ipv4.tcp_window_scaling=1
  net.ipv4.tcp_rmem=4096 87380 67108864
  net.ipv4.tcp_wmem=4096 65536 67108864

• Applies changes instantly with sysctl --system

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🧹 Uninstallation

To revert changes:

sudo rm -f /etc/sysctl.d/99-network-optimizer.conf
sudo rm -f /etc/modules-load.d/bbrv2.conf
sudo sysctl --system
sudo reboot

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🧪 Tested Environments

Distribution	Kernel	Status
Ubuntu 20.04	5.15.x	✅
Ubuntu 22.04	5.19+	✅
Debian 11	5.10.x	✅
Debian 12	6.1.x	✅
AlmaLinux 9	5.14.x	✅
Oracle Linux 8	5.15+ (UEK)	✅
Alpine Edge	6.1+	✅

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📈 Performance Benefits (with BBR enabled)

After enabling BBR (v1 or v2, depending on your kernel), you can expect:

• 🌍 Faster CDN/Cloudflare traffic
• 🛰️ Reduced SSH/RDP latency
• 📦 Improved TCP-based download speeds (HTTP, Git, APT/YUM, etc.)
• 📡 Enhanced stability for VPNs (WireGuard, OpenVPN, Shadowsocks)

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⚠️ Troubleshooting

• BBR not active: Ensure your kernel supports tcp_bbr (5.4+). BBRv2 requires experimental kernel patches and is not enabled by default in mainline kernels. Upgrade your kernel if needed:

  sudo apt update && sudo apt install linux-generic-hwe-22.04

• Permission denied: Run the script with sudo.
• Module not found: Verify the tcp_bbr module is available:

  modprobe tcp_bbr

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📜 License

This project is licensed under the MIT License. Feel free to use, fork, modify, and share!

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🤝 Contributing

Contributions are welcome! To contribute:

1. Fork the repository.
2. Create a feature branch (git checkout -b feature/YourFeature).
3. Commit your changes (git commit -m 'Add YourFeature').
4. Push to the branch (git push origin feature/YourFeature).
5. Open a Pull Request.

Please ensure your changes are well-tested and include a description of the changes.