WireGuard is a kernel-resident VPN tunnel: roughly 4,000 lines of code, built on the Noise protocol framework with ChaCha20-Poly1305 authenticated encryption. Because it runs inside the Linux kernel (since 5.6) instead of in userspace, it delivers near-native throughput \u2014 benchmarks routinely show WireGuard saturating a gigabit link while OpenVPN manages 30\u201350% of line rate on the same hardware.<\/p>\n\n\n\n
VPN throughput is single-threaded, so it depends heavily on your vCPU’s single-core speed. Check the CPU specs \u2014 see the full specs on our VPS comparison table<\/a> \u2014 before you commit to a budget plan with a weak core.<\/p>\n\n\n\n The table explains the practical differences: WireGuard’s fixed header and kernel data path cut both latency and CPU overhead, while OpenVPN’s TCP mode can compound packet loss with retransmission stalls. For a VPS acting as a remote-access gateway, WireGuard is the default choice in 2026.<\/p>\n\n\n\n There are trade-offs worth knowing. WireGuard is connectionless \u2014 there is no built-in notion of a session, so roaming clients and IP changes are handled gracefully, but per-user authentication and revocation require either manual peer management or a wrapper like wg-easy. OpenVPN brings a mature ecosystem of user databases and certificates. For a single-admin VPS or a small team, WireGuard’s simplicity wins; the Ubuntu 24.04 ships the wireguard-tools package and the kernel module is included in the generic kernel, so no third-party repositories are needed.<\/p>\n\n\n\n Choose the tunnel subnet before you configure anything. 10.0.0.0\/24 is the conventional choice, but if your LAN or office network already uses that range, pick 10.200.0.0\/24 or 172.16.0.0\/24 to avoid route collisions when clients are at home. Document the subnet and the server address \u2014 you will need them in every client config.<\/p>\n\n\n\n The server keeps a static address in the tunnel network (10.0.0.1\/24) and one Key hygiene matters more here than in most setups: the private key on the server should be readable only by root ( The single MASQUERADE rule lets tunnel clients reach the internet through the VPS. Make it persistent with If the VPS also runs a firewall (ufw or nftables), allow UDP 51820 explicitly and ensure the FORWARD chain permits traffic between the tunnel interface and the public interface. A common failure mode is a firewall that allows the handshake but drops forwarded packets, leaving you with a tunnel that connects and then stalls \u2014 check Start with a full-tunnel config for maximum privacy, then trim How WireGuard Compares to OpenVPN<\/h2>\n\n\n\n
<\/th> WireGuard<\/th> OpenVPN<\/th><\/tr><\/thead> Codebase<\/td> ~4,000 lines<\/td> 100,000+ lines<\/td><\/tr> Crypto<\/td> ChaCha20-Poly1305 (kernel)<\/td> OpenSSL, AES-NI<\/td><\/tr> Transport<\/td> UDP only<\/td> UDP or TCP<\/td><\/tr> Handshake<\/td> Noise IK (1 round trip)<\/td> TLS-style, multi-round<\/td><\/tr> Config<\/td> One [Peer] block<\/td> Certificates + CRL<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n wg<\/code> command line is the entire control plane.<\/p>\n\n\n\nInstalling WireGuard on the VPS<\/h2>\n\n\n\n
apt update && apt install -y wireguard\nmodprobe wireguard\nsysctl -w net.ipv4.ip_forward=1\necho \"net.ipv4.ip_forward=1\" >> \/etc\/sysctl.conf<\/code><\/pre>\n\n\n\nGenerating Keys and Writing wg0.conf<\/h2>\n\n\n\n
umask 077\nwg genkey | tee \/etc\/wireguard\/privatekey | wg pubkey > \/etc\/wireguard\/publickey<\/code><\/pre>\n\n\n\n[Interface]\nAddress = 10.0.0.1\/24\nListenPort = 51820\nPrivateKey = [Peer]<\/code> block per client, each with its own \/32<\/code> address. Add more peers by appending blocks and restarting the interface.<\/p>\n\n\n\nchmod 600 \/etc\/wireguard\/privatekey<\/code>), and the wg0.conf<\/code> file should live in \/etc\/wireguard\/<\/code> with the same permissions. If a client is compromised, remove its peer block \u2014 there is no certificate revocation list to update, which is both the simplicity and the risk of the protocol.<\/p>\n\n\n\nEnabling NAT for Client Traffic<\/h2>\n\n\n\n
iptables -t nat -A POSTROUTING -s 10.0.0.0\/24 -o eth0 -j MASQUERADE\nsystemctl enable --now wg-quick@wg0\nwg show # verify handshakes appear<\/code><\/pre>\n\n\n\niptables-persistent<\/code> or your firewall management tool so a reboot does not silently break the tunnel.<\/p>\n\n\n\niptables -L -v<\/code> counters to see where packets stop.<\/p>\n\n\n\nAdding Clients<\/h2>\n\n\n\n
[Interface]\nAddress = 10.0.0.2\/24\nPrivateKey = wg genkey<\/code>\/wg pubkey<\/code> and paste the public key into the server config.<\/li>qrencode -t ansiutf8 < client.conf<\/code> and scan it in the WireGuard app.<\/li>PersistentKeepalive = 25<\/code> keeps NAT mappings alive on mobile networks and behind carrier-grade NAT.<\/li>wg set wg0 peer <pubkey> allowed-ips 10.0.0.x\/32<\/code> without restarting the interface.<\/li><\/ul>\n\n\n\nFull Tunnel vs Split Tunnel<\/h2>\n\n\n\n
AllowedIPs = 0.0.0.0\/0<\/code>): all client traffic routes through the VPS \u2014 maximum privacy, higher latency, uses your VPS bandwidth.<\/li>AllowedIPs = 10.0.0.0\/24<\/code>): only VPS-bound traffic goes through the tunnel; everything else uses the local connection \u2014 better for accessing a home network or internal services.<\/li>Troubleshooting Common Failures<\/h2>\n\n\n\n
Symptom<\/th> Cause<\/th> Fix<\/th><\/tr><\/thead> Handshake never completes<\/td> UDP 51820 blocked<\/td> Open the port in the firewall \/ provider panel<\/td><\/tr> No internet through tunnel<\/td> Missing MASQUERADE rule<\/td> Re-add POSTROUTING rule and check ip_forward<\/td><\/tr> Slow throughput<\/td> Single-core bottleneck<\/td> Choose a VPS with a fast single-core vCPU<\/td><\/tr> DNS leaks<\/td> Resolver not pushed<\/td> Set DNS = in the client [Interface] block<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n AllowedIPs<\/code> once you trust the routing. When you pick the node for it, compare plans side by side on our comparison table<\/a> \u2014 a fast single-core vCPU is what WireGuard actually needs.<\/p>\n\n\n\n