Installing Oniux v0.7.0: Complete Guide

1. Introduction to Oniux

Oniux is a powerful network isolation tool that leverages Linux network namespaces and the Arti Tor implementation (written in Rust) to provide transparent Tor routing for any application. Unlike traditional Tor proxy setups, Oniux creates an isolated network environment where all traffic is automatically routed through the Tor network.

2. What is Oniux?

Technical Overview

Oniux combines several technologies to achieve network-level isolation:

• Arti: The Tor client implementation in Rust, providing modern and secure Tor connectivity
• Network Namespaces: Linux kernel feature for network isolation
• TUN Interface: Virtual network device for routing all traffic
• Onionmasq: NAT-like mechanism for .onion address resolution

Why Use Oniux?

Feature	Traditional Tor Proxy	Oniux
DNS Leak Protection	Manual configuration required	✅ Automatic
IPv6 Leak Protection	Must be manually disabled	✅ Completely isolated
Application Compatibility	Apps must support SOCKS proxy	✅ Any application
Configuration Complexity	Per-application setup	✅ Single command wrapper

3. Prerequisites

System Requirements

• Linux kernel 4.18+ (for network namespace support)
• TUN/TAP support enabled in kernel (usually default)
• At least 100MB free disk space
• Active internet connection

Required Software

Common to All Distributions

• Rust toolchain: rustc and cargo 1.70+
• Git: For cloning the repository
• Build essentials: GCC, make, pkg-config

4. Installation on Arch Linux

Step 1: Install Dependencies

Arch Linux provides up-to-date Rust packages in the official repository:

# Update system
sudo pacman -Syu

# Install Rust toolchain and dependencies
sudo pacman -S rust cargo git base-devel pkg-config

Step 2: Verify TUN Support

# Check if TUN device exists
ls -l /dev/net/tun

# Expected output:
# crw-rw-rw- 1 root root 10, 200 Feb  4 13:53 /dev/net/tun

Step 3: Install Oniux via Cargo

Install directly from the official Tor Project GitLab repository:

cargo install --locked \
  --git https://gitlab.torproject.org/tpo/core/oniux \
  --tag v0.7.0 \
  oniux

Step 4: Verify Installation

# Check binary exists and size
ls -lh ~/.cargo/bin/oniux

# Expected output:
# -rwxr-xr-x 1 user user 28M Feb 4 20:59 /home/user/.cargo/bin/oniux

# Add to PATH if not already (add to ~/.bashrc or ~/.zshrc)
export PATH="$HOME/.cargo/bin:$PATH"

5. Installation on Debian/Ubuntu

Step 1: Install Rust Toolchain

Debian's Rust packages are often outdated. Install via rustup instead:

# Install prerequisites
sudo apt update
sudo apt install -y curl build-essential pkg-config git

# Install rustup (Rust installer)
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

# Follow prompts, select default installation

# Activate Rust in current shell
source "$HOME/.cargo/env"

# Verify installation
rustc --version
cargo --version

Step 2: Verify TUN Support

# Check TUN device
ls -l /dev/net/tun

# If missing, load TUN module (usually not necessary)
sudo modprobe tun

Step 3: Install Oniux

Same command as Arch Linux:

cargo install --locked \
  --git https://gitlab.torproject.org/tpo/core/oniux \
  --tag v0.7.0 \
  oniux

Step 4: Add to PATH

# Add to ~/.bashrc
echo 'export PATH="$HOME/.cargo/bin:$PATH"' >> ~/.bashrc

# Reload shell configuration
source ~/.bashrc

# Verify
which oniux

6. Verification and Testing

Basic Functionality Test

# Display help (instant, no Tor connection)
oniux --help

Test Tor Connection

# Simple echo test (will take 1-2 minutes on first run)
oniux echo "Tor connection successful!"

# Test with curl to check IP
oniux curl -s https://check.torproject.org/api/ip

# Expected output (JSON):
# {"IsTor":true,"IP":"xxx.xxx.xxx.xxx"}

Verify Tor IP Address

# Get your Tor exit node IP
oniux curl -s ifconfig.me

# Compare with your real IP (in separate terminal without oniux)
curl -s ifconfig.me

# IPs should be different!

7. Troubleshooting

Problem 1: TUN Interface Error

Solution:

# Check if TUN device exists
ls -l /dev/net/tun

# If missing, create it (rare)
sudo mkdir -p /dev/net
sudo mknod /dev/net/tun c 10 200
sudo chmod 666 /dev/net/tun

# Or load TUN module
sudo modprobe tun

Problem 2: Very Slow Bootstrap (4+ minutes)

If Oniux takes more than 2 minutes to establish Tor connection, this may indicate network issues or Tor network congestion.

Diagnostic steps:

# Run with logging to see what's happening
oniux -l info curl -s ifconfig.me

# Check if system Tor is interfering (should not conflict, but verify)
systemctl status tor

# Clear Arti cache and try again
rm -rf ~/.cache/arti ~/.local/share/arti
oniux echo "test"

Possible causes:

• ISP blocking/throttling: Some ISPs rate-limit Tor connections
• Firewall rules: Check if outbound connections to Tor directory authorities are allowed
• Tor network congestion: Try again later or use bridges (advanced)
• Old Arti state: Clear cache directories as shown above

Problem 3: Permission Denied Errors

Oniux creates network namespaces which require specific capabilities. Normally, this works for regular users, but some systems may require additional configuration.

# Check namespace limits
cat /proc/sys/user/max_user_namespaces

# Should output a number > 0 (e.g., 63218)
# If it's 0, namespaces are disabled

# Enable (temporary, requires root)
sudo sysctl -w user.max_user_namespaces=63218

# Enable permanently
echo "user.max_user_namespaces=63218" | sudo tee -a /etc/sysctl.conf

Problem 4: Cargo Build Failures

If compilation fails with cryptic Rust errors:

# Update Rust toolchain to latest stable
rustup update stable

# Clean cargo cache
cargo clean

# Retry installation
cargo install --locked \
  --git https://gitlab.torproject.org/tpo/core/oniux \
  --tag v0.7.0 \
  oniux

8. Usage Examples

Example 1: Anonymous Web Browsing

# Launch Firefox through Tor
oniux firefox

# Or Chromium
oniux chromium

Example 2: SSH Over Tor

# Connect to SSH server through Tor
oniux ssh user@example.com

# Connect to .onion hidden service
oniux ssh user@examplexxx...onion

Example 3: Git Operations Through Tor

# Clone repository anonymously
oniux git clone https://github.com/user/repo.git

# Push to remote through Tor
cd repo
oniux git push origin main

Example 4: Email Client (NeoMutt)

# Launch NeoMutt with Tor isolation
oniux neomutt

# Send email to mail2news gateway over Tor
# (see my article on NeoMutt mail2news configuration)

Example 5: Package Manager Through Tor

# Update package database through Tor (Arch)
oniux sudo pacman -Sy

# Note: This is SLOW and not recommended for regular use
# Better to use Tor for specific downloads only

9. Security Considerations

What Oniux Does Protect

• ✅ Network-level anonymity (IP address hidden)
• ✅ DNS leak prevention (all DNS through Tor)
• ✅ IPv6 leak prevention (isolated namespace)
• ✅ Traffic routing isolation

What Oniux Does NOT Protect

• ❌ Browser fingerprinting
• ❌ Application-level metadata leaks
• ❌ Time-based correlation attacks
• ❌ Endpoint authentication (use HTTPS/TLS separately)

Best Practices

1. Use HTTPS: Tor provides anonymity, not encryption of content. Always use HTTPS for sensitive data.
2. Avoid logging in: Don't log into personal accounts when using Tor unless absolutely necessary.
3. One identity per session: Don't mix anonymous and identifiable activities in same Oniux session.
4. Keep software updated: Regularly update Oniux and Rust toolchain for security patches.
5. Verify downloads: Always verify you're installing from official Tor Project sources.

Tor Network Health

Check Tor network status before critical operations:

# Check Tor network status
oniux curl -s https://status.torproject.org/

10. Conclusion

Oniux v0.7.0 provides a robust, modern approach to network-level anonymization using Linux namespaces and the Arti Tor implementation. By creating fully isolated network environments, it eliminates many common pitfalls of traditional Tor proxy setups.

Key Takeaways

• Oniux installation takes 15-20 minutes due to Rust compilation
• First Tor connection bootstrap takes 60-120 seconds
• TUN/TAP support must be enabled (usually default)
• Works on any Linux distribution with kernel 4.18+
• Provides transparent Tor routing for any application

Further Reading

• Official Oniux Documentation
• Oniux GitLab Repository
• Arti 1.0 Release Announcement
• Tor Project Official Website