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Alex Spinov
Alex Spinov

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WireGuard Has a Free VPN — Modern, Fast, and Dead Simple to Configure

#wireguard #vpn #networking #free

OpenVPN config files are 50+ lines. IPSec is worse. WireGuard is 15 lines and 4,000 lines of code total. It's in the Linux kernel. It's the fastest VPN protocol that exists.

Setting up a private VPN used to take hours. With WireGuard, it takes 5 minutes.

What You Get Free

GPL licensed, built into Linux kernel:

  • 4,000 lines of code — vs 600K for OpenVPN. Smaller = more secure.
  • Kernel-level performance — 3-4x faster than OpenVPN
  • Cryptographically sound — Curve25519, ChaCha20, Poly1305, BLAKE2s
  • Simple config — 15 lines for a full tunnel
  • Roaming — seamlessly switch between WiFi and cellular
  • Cross-platform — Linux, macOS, Windows, iOS, Android
  • UDP-based — faster than TCP-based VPNs
  • Silent when idle — sends no packets when not in use

Quick Start

Server (any VPS):

apt install wireguard

# Generate keys
wg genkey | tee /etc/wireguard/private.key | wg pubkey > /etc/wireguard/public.key

# /etc/wireguard/wg0.conf
cat > /etc/wireguard/wg0.conf << 'EOF'
[Interface]
PrivateKey = SERVER_PRIVATE_KEY
Address = 10.0.0.1/24
ListenPort = 51820
PostUp = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE

[Peer]
PublicKey = CLIENT_PUBLIC_KEY
AllowedIPs = 10.0.0.2/32
EOF

wg-quick up wg0
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Client:

[Interface]
PrivateKey = CLIENT_PRIVATE_KEY
Address = 10.0.0.2/24
DNS = 1.1.1.1

[Peer]
PublicKey = SERVER_PUBLIC_KEY
Endpoint = YOUR_SERVER_IP:51820
AllowedIPs = 0.0.0.0/0
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What You Can Build

1. Private VPN — encrypt all traffic through your VPS. $4/month total cost.
2. Site-to-site tunnel — connect home and office networks securely.
3. Remote access — access home server from anywhere.
4. Split tunneling — route only specific traffic through VPN.
5. Mesh network — connect all your devices with tools like Tailscale (built on WireGuard).

Need networking automation? Email spinov001@gmail.com

More free tiers: 70+ Free APIs Every Developer Should Bookmark

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