Remote work is no longer a temporary arrangement for most Australian businesses. Staff are connecting from home offices in Western Sydney, from hotel rooms in Brisbane, and from co-working spaces across the country — all of them needing secure, reliable access to internal systems. At the same time, multi-office businesses are wrestling with the challenge of linking their sites without expensive leased-line infrastructure.
The traditional answer has been a VPN. But most businesses that run one know the frustration: dropped connections, sluggish throughput, complex configurations that only one person in the company understands, and a nagging sense that the whole thing was designed in an earlier internet era — because it was.
WireGuard changes the equation. It is a modern VPN protocol that is faster, simpler, and more secure than anything that came before it. It is also almost completely absent from Australian managed IT conversations — which means businesses that adopt it now are getting a genuine advantage.
This guide explains what WireGuard is, why it outperforms legacy VPN technology, the three main business scenarios where it delivers real value, and what you need on the network side to make it work — including why Pickle's business internet services are a natural fit.
What Is WireGuard?
WireGuard is an open-source VPN protocol — not a product or a subscription service, but a piece of software that creates an encrypted tunnel between two network endpoints. It was created by security researcher Jason Donenfeld and merged into the Linux kernel (version 5.6) in 2020, giving it a level of mainstream legitimacy that few networking technologies achieve.
The protocol is available across every major platform: Windows, macOS, Linux, iOS, Android, FreeBSD, and a growing list of routers including those running OpenWRT, pfSense, and OPNsense.
To understand why WireGuard matters, it helps to understand what makes a VPN protocol either good or poor. Every VPN has to do three things: exchange cryptographic keys, encrypt traffic in both directions, and verify that nothing has been tampered with in transit. The question is how elegantly it does those three things and how much complexity it introduces along the way.
WireGuard uses a carefully selected suite of modern cryptographic primitives: Curve25519 for key exchange, ChaCha20 for symmetric encryption, Poly1305 for message authentication, and BLAKE2 for hashing. Each of these is a current best-practice choice — not a legacy algorithm kept in place for backwards compatibility.
The entire WireGuard codebase is approximately 4,000 lines. OpenVPN, the most widely deployed alternative, runs to more than 400,000 lines. That is not a trivial difference. Every line of code is a potential surface for vulnerabilities. A smaller, auditable codebase is intrinsically more secure — and easier to maintain, verify, and update.
Why WireGuard Outperforms Legacy VPN Technology
Speed
Legacy VPN protocols like OpenVPN were built around TCP — the same connection-oriented protocol your browser uses for HTTP. TCP introduces overhead: acknowledgement packets, retransmission logic, and connection state management. When that overhead is layered inside a VPN tunnel, you compound latency at every step.
WireGuard runs exclusively over UDP, operating by default on port 51820. UDP is connectionless — it sends packets without waiting for acknowledgement — which is significantly faster for the real-world traffic patterns of business applications: file access, video calls, cloud application sessions, and VoIP. In benchmarked comparisons, WireGuard consistently achieves higher throughput and lower latency than OpenVPN or IPsec for the same hardware.
Simplicity
The configuration model for WireGuard is deliberately minimal. Each peer — whether a server or a client — has a public/private key pair. You add a peer's public key to your configuration, specify which IP ranges it is allowed to reach, and the tunnel works. There is no certificate authority to maintain, no complex daemon configuration, and no negotiation phase that can fail in opaque ways.
For IT teams — or managed IT providers — this simplicity translates directly into faster deployment and less troubleshooting.
Roaming Support
One of WireGuard's most practical features for mobile workers is seamless roaming. When a staff member's laptop or phone changes its IP address — moving from the office Wi-Fi to a 4G mobile connection, for instance — the WireGuard tunnel reconnects automatically. There is no manual re-authentication, no VPN client prompting for credentials, no dropped session. The tunnel simply follows the device.
This is a meaningful quality-of-life improvement over older VPN clients, which frequently require manual reconnection after any network change.
Three Business Use Cases for WireGuard in Australia
1. Remote Worker Access
The most common deployment: staff working from home or travelling connect their laptop or phone to the office network via WireGuard. The WireGuard server runs on the office router or a server at the premises. From the employee's perspective, they are on the office network — they can access internal file shares, printers, accounting software, or any system that is not exposed to the public internet.
For this to work, the office needs a public IP address reachable from the internet. The remote worker's device can be behind any NAT or firewall — WireGuard handles that transparently.
2. Site-to-Site VPN
For businesses with multiple offices — a head office in Sydney and a branch in Melbourne, for instance — WireGuard can connect the two sites at the network level. Staff at either location can reach shared resources at the other site as though they were on the same local network: file servers, internal databases, printers, IP-based phone systems.
Each site needs a router that supports WireGuard and a public IP address. The configuration is straightforward compared to equivalent IPsec tunnels, and the performance is markedly better.
3. Securing Cloud or SaaS Access with Known Egress IP
Routing staff traffic through a WireGuard server before it exits to the internet gives every user a consistent, known public IP address. This matters for firewall whitelisting — cloud platforms, SaaS tools, or third-party APIs that only accept connections from approved IP ranges — and for certain compliance frameworks that require auditable, controlled egress points.
This use case is directly complementary to Essential Eight cybersecurity controls, specifically around restricting administrative access and controlling network traffic. If your business is working through ASD Essential Eight compliance, a WireGuard-based egress strategy is worth discussing with your IT provider.
What You Need for WireGuard to Work
WireGuard is not complicated, but it does have two hard requirements on the network infrastructure side.
A public IP address or DDNS hostname for the server. For remote workers or branch offices to connect to your WireGuard server, that server must be reachable from the internet. This means the office internet connection must provide either a static public IP or a dynamic public IP paired with a DDNS (Dynamic DNS) hostname — a hostname that automatically updates to reflect the current IP address whenever it changes.
This is where many Australian businesses hit a wall. A significant proportion of business NBN services in Australia sit behind CGNAT (Carrier-Grade NAT), meaning the connection shares a public IP with other customers and has no individually reachable public address at all. A WireGuard server behind CGNAT simply cannot accept inbound connections from remote workers.
A compatible router or server at the WireGuard server end. The device running the WireGuard server — whether that is the office router itself or a dedicated server on the network — needs to support WireGuard. For routers, this means running firmware such as OpenWRT, pfSense, or OPNsense, or a recent version of a commercial router OS with WireGuard support. WireGuard clients on staff devices (Windows, macOS, iOS, Android) are freely available and straightforward to install.
How Pickle's Internet Services Enable WireGuard
Pickle's business internet products are built around the premise that businesses deserve proper public IP connectivity — not shared, not hidden behind carrier NAT.
Business Broadband (NBN) includes a static IP address as standard. This makes it straightforward to deploy a WireGuard server at the office: the static IP becomes the server endpoint, staff configure their WireGuard clients to connect to that IP, and the tunnel is reliable regardless of when they connect or from where.
Enterprise Ethernet goes further — static IP addressing plus routed subnets, giving businesses that need enterprise WireGuard deployments the IP infrastructure to support multiple server endpoints, segmented tunnels for different user groups, or redundant configurations.
Fixed Wireless (Gen 3) is the most interesting case. Fixed Wireless connections receive a public IP address, but that IP may change periodically rather than being fully static. Pickle addresses this directly: Fixed Wireless customers have access to Pickle's own DDNS server, which keeps a hostname continuously updated to reflect the current public IP. A WireGuard server configured with that DDNS hostname as its endpoint remains reachable even when the underlying IP changes — the hostname always resolves to the right address.
This DDNS capability is genuinely differentiating. The alternative for businesses without a static IP is typically either upgrading to a more expensive service tier or abandoning server-side WireGuard entirely. Pickle's Fixed Wireless removes that barrier.
WireGuard deployment — configuring the server, setting up peer keys, distributing client configurations to staff — is the kind of work that fits squarely within managed IT services. If you have an existing IT provider, they can handle the setup. If you do not, it is one of the practical reasons businesses consider a managed IT relationship.
WireGuard's resilience is also complemented by a solid failover strategy. If your primary connection goes down, a 4G failover link keeps the tunnel alive — critical for businesses where VPN-dependent systems cannot afford downtime.
For a full view of Pickle's business internet products and which include static IPs and DDNS, visit thinkpickle.com.au/products/business-internet.
Is WireGuard Right for Your Business?
WireGuard is a strong fit if your business has remote workers who need reliable, fast access to internal systems; if you have two or more offices that need to share network resources; if you are replacing an ageing, underperforming OpenVPN or IPsec setup; or if your business needs controlled, auditable internet egress for compliance reasons.
The main prerequisite is the network infrastructure: you need a business internet connection that provides a public IP address — static or dynamic with DDNS. If your current connection is behind CGNAT, WireGuard server deployments are not possible without changing the connection.
If you are unsure whether your current internet service supports WireGuard, that is the right starting question to ask — and one Pickle can answer directly.
Frequently Asked Questions
Q: Is WireGuard safe to use for business?
A: Yes. WireGuard uses modern, well-reviewed cryptographic algorithms and has a codebase small enough to be independently audited. It was integrated into the Linux kernel — one of the most scrutinised codebases in the world — in 2020. Security researchers and enterprise IT teams consider it more secure than OpenVPN or legacy IPsec in most configurations, particularly when those legacy deployments have accumulated years of configuration drift.
Q: Does WireGuard work on all devices?
A: WireGuard clients are available for Windows, macOS, Linux, iOS, and Android. It is also supported on many business routers running OpenWRT, pfSense, or OPNsense firmware. Staff can install the client app on their own devices without specialist software.
Q: Can WireGuard replace our existing VPN?
A: In most cases, yes. Businesses currently running OpenVPN or IPsec for remote access or site-to-site connectivity can migrate to WireGuard and typically see improved performance and simpler administration. Migration should be planned with your IT provider to ensure continuity.
Q: Does my business need a static IP to use WireGuard?
A: The WireGuard server — the device at your office that staff connect to — needs either a static public IP or a DDNS hostname that resolves to the current public IP. The remote workers connecting to it can be on any internet connection, including those behind NAT. Pickle's business internet services all provide a public IP (static or with DDNS), which is why they are well-suited to WireGuard server deployments.
Q: Is WireGuard a managed service Pickle provides?
A: Pickle provides the business internet connectivity — including the static or public IP — that makes WireGuard server deployments possible. The actual WireGuard configuration is typically handled by your IT provider or Pickle's managed IT team. If you do not have an existing IT provider, Pickle can help assess your requirements and connect you with the right support.
Talk to Pickle About Your Business Internet Foundation
Whether you are evaluating WireGuard for the first time or trying to work out why your current internet service is not giving you the public IP you need, Pickle's team can help you understand your options.
Call 1300 688 588 or email [email protected] to talk through whether your current internet service supports a WireGuard deployment — and which Pickle product gives you the right foundation if it does not.