WireGuard Keys & Peers
WireGuard & Curve25519 Cryptographic Suite

WireGuard Key Pair & Peer Configuration Generator

Generate WireGuard Curve25519 public and private key pairs, preshared keys (PSK), and client/server configuration blocks.

100% Client-Side Privacy
Curve25519 ↔ wg0.conf & wg-client.conf
Presets:
Interface Parameters & Cryptographic Handshake Options
UDP 51820•2 Peers
Configured Peers:
Work Laptop(10.8.0.2/32)
iPhone Roaming(10.8.0.3/32)
Peer Definitions & Key Input2 Peers
33 lines1076 chars1076 B
Curve25519 Base64Sync Active
# =========================================================
# WireGuard Client Configuration for: Work Laptop
# Save to /etc/wireguard/wg0-client.conf or import into app
# =========================================================

[Interface]
PrivateKey = qIOQti92akyvcSrNxKmDGmOTOqZpyCNpIiRCU1AqIFI=
Address = 10.8.0.2/32, fd86:ea04:1115::2/128
DNS = 1.1.1.1, 8.8.8.8
MTU = 1420

[Peer]
PublicKey = WkT9aMOtAuXEg5bG2/PvXSNJ90Fcf4UejCPG7Fmfs2U=
PresharedKey = WYf+0IeaWwZX2zdozh+ujBc32PJ2NCPhB7vG1OmlluE=
Endpoint = vpn.example.com:51820
AllowedIPs = 0.0.0.0/0, ::/0
PersistentKeepalive = 25
18 lines592 chars592 B
wg-client.confWireGuard v1
Active Peers
2 Client Peers
10.8.0.1/24, fd86:ea04:1115::1/64
Curve25519 Keys
3 RFC 7748 Keypairs
256-bit ECDH Clamped
WireGuard Tunnel
PSK Hardened (256-bit)
Port 51820 • MTU 1420

Curve25519 Key Generation

Pure RFC 7748 X25519 Elliptic Curve Diffie-Hellman scalar multiplication computed locally with zero server transmission.

Zero-Knowledge In-Browser Execution

All private keys, preshared keys, and endpoint configurations remain strictly inside your browser memory.

Cross-Platform WireGuard Ready

Instant export for Linux wg-quick, macOS, Windows, Android/iOS QR scanning, and Docker Compose deployments.

Technical Reference & Architecture Guide

WireGuard Key Pair & Peer Configuration Generator Developer Guide — Reference Guide

Generate WireGuard Curve25519 public and private key pairs, preshared keys (PSK), and client/server configuration blocks with browser-local cryptography.

Key Parameters & Controls

PrivateKeyBase64 (32-byte Curve25519)

Secret private key used for local endpoint decryption and session authentication in the WireGuard interface.

Default: Auto-generated
PublicKeyBase64 (32-byte Curve25519)

Public key derived mathematically from the private key via X25519 scalar multiplication, shared with remote peers.

Default: Derived
PresharedKey (PSK)Base64 (32-byte symmetric)

Optional 256-bit symmetric preshared key establishing post-quantum hybrid security across peer channels.

Default: Optional
AllowedIPsCIDR List

Cryptokey routing filter specifying incoming/outgoing tunnel IP ranges (e.g. 0.0.0.0/0 for default gateway or specific subnets).

Default: 0.0.0.0/0, ::/0
EndpointHostname / IP:Port

Publicly accessible IPv4/IPv6 address or domain and UDP port of the remote listening peer.

Default: vpn.example.com:51820
PersistentKeepaliveInteger (seconds)

Heartbeat packet interval in seconds to keep stateful NAT firewalls and dynamic IP mappings open.

Default: 25

Pro Tips & Best Practices

Pure Client-Side Cryptographic Isolation

All Curve25519 keypairs and symmetric PSKs are generated using browser WebCrypto and CSPRNG primitives. Keys never traverse network sockets, avoiding server-side key compromise.

Quantum-Resistant Defense with PSK

Pairing Curve25519 with a 256-bit symmetric PresharedKey creates a post-quantum hybrid channel. If Shor's algorithm later compromises elliptic curves, the symmetric layer remains unbreakable.

Cryptokey Routing and Strict AllowedIPs Separation

WireGuard routes packets purely based on the public key matched in AllowedIPs. Ensure client tunnel IPs never overlap across peers to prevent route flapping and silent packet drops.

Optimizing MTU for Cellular and PPPoE Networks

Set 'MTU = 1420' or '1360' on mobile and PPPoE clients to account for WireGuard's 32-byte header encapsulation over IPv4/IPv6 networks and prevent packet fragmentation.

Common Gotchas & Troubleshooting

Handshake completion fails (zero bytes received from peer)

Verify that UDP port 51820 (or your configured custom port) is opened on host/cloud security groups, that the server's public IP/FQDN in Endpoint is resolvable, and that the remote peer has added this peer's PublicKey to its configuration.

Tunnel handshake succeeds but traffic routing or internet access fails

Enable IPv4 forwarding on the gateway server (sysctl -w net.ipv4.ip_forward=1) and configure iptables/nftables MASQUERADE NAT rules for outbound traffic on the physical WAN interface.

Persistent connection drops behind home router or cellular NAT

Add 'PersistentKeepalive = 25' to the client's [Peer] block to continuously transmit keepalive packets every 25 seconds, preventing stateful NAT session expiration.

Frequently Asked Questions

What cryptographic primitives does WireGuard use for key generation?▼

WireGuard utilizes Curve25519 for ECDH key exchange, ChaCha20 for symmetric encryption, Poly1305 for message authentication, and BLAKE2s for cryptographic hashing. Keys are encoded as 32-byte Base64 strings.

Why is a PresharedKey (PSK) recommended in WireGuard peer setups?▼

A PSK adds a layer of post-quantum symmetric encryption (256-bit) to the standard Curve25519 Diffie-Hellman exchange. Even if a future quantum computer breaks elliptic curve cryptography, recorded traffic remains secure.

Can multiple WireGuard clients share the same private/public keypair?▼

No. WireGuard strictly maps internal tunnel IP addresses to peer public keys (Cryptokey Routing). Sharing a key across multiple endpoints causes IP address conflicts, route flapping, and disconnected peers.

How does AllowedIPs differ between server configuration and client configuration?▼

In a server's [Peer] block, AllowedIPs defines the specific single IP (/32 or /128) assigned to that client. In a client's [Peer] block, AllowedIPs specifies the subnets routed through the server (e.g. 0.0.0.0/0 for full tunnel, or 10.0.0.0/24 for split tunnel).

How do I safely apply the generated peer configuration in Linux wg-quick?▼

Save the server block to /etc/wireguard/wg0.conf or execute 'wg set wg0 peer <PublicKey> allowed-ips <IP>/32' for runtime live updates without restarting the interface.

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