NetBird Review: Zero-Trust Networking for DevOps Teams Without the VPN Pain

Traditional VPNs are a DevOps tax. Someone needs to maintain the VPN server, manage access lists, handle the certificate renewals, and deal with the "VPN is down" tickets every time a team member cannot reach the staging cluster.

NetBird is one of several tools that have emerged to replace this pattern with something better: a WireGuard-based overlay network where peers connect directly to each other, access is controlled by policies, and there is no single VPN server to maintain.

I spent several weeks using NetBird to connect developers to Kubernetes clusters, manage access to RDS databases, and replace an aging OpenVPN setup. Here is what I found.

What NetBird Is

NetBird is an open-source, self-hostable overlay network built on WireGuard. You install the NetBird agent on every machine or server you want to connect, and they form a mesh network where each peer can communicate directly with others based on access policies you define.

The key characteristics:

• WireGuard underneath — fast, modern, kernel-level encryption
• No VPN server bottleneck — peers connect directly, not through a central relay (when possible)
• Identity-based access — access is controlled by user/group policies, not IP allowlists
• Self-hostable — you can run the management plane (NetBird Management Server) on your own infrastructure, or use NetBird's hosted version

Installation

The agent installation is simple:

# Linux
curl -fsSL https://pkgs.netbird.io/install.sh | sh
 
# Mac
brew install netbirdio/tap/netbird
 
# Windows
# Download MSI from netbird.io

On Kubernetes, deploy as a DaemonSet or a single pod to give cluster access:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: netbird-client
  namespace: netbird
spec:
  replicas: 1
  selector:
    matchLabels:
      app: netbird-client
  template:
    spec:
      containers:
      - name: netbird
        image: netbirdio/netbird:latest
        securityContext:
          capabilities:
            add: ["NET_ADMIN", "SYS_ADMIN"]
          privileged: true
        env:
        - name: NB_SETUP_KEY
          valueFrom:
            secretKeyRef:
              name: netbird-setup-key
              key: key
        - name: NB_MANAGEMENT_URL
          value: "https://api.wiretrustee.com"
        volumeMounts:
        - name: tun
          mountPath: /dev/net/tun
      volumes:
      - name: tun
        hostPath:
          path: /dev/net/tun

Once the agent is running, the Kubernetes pod network is accessible from any machine with the NetBird agent authenticated to the same account — no kubectl port-forward needed.

Access Control with Policies

This is where NetBird's approach shines over traditional VPNs. Instead of IP-based firewall rules, you define policies based on groups:

Policy: "Engineers can access K8s clusters"
Source: Group "engineering"
Destination: Group "kubernetes-clusters"
Protocol: All

Policy: "Database access for backend team only"
Source: Group "backend-engineers"
Destination: Group "production-databases"
Protocol: TCP port 5432

When someone joins the company, you add them to the right groups. When they leave, you remove their account. No firewall rule updates, no certificate revocations, no VPN access list changes.

The policy engine handles the complexity of "who can talk to what" across the entire network, and the WireGuard tunnels enforce it.

Self-Hosted vs. NetBird Cloud

NetBird's management server (which handles peer discovery, authentication, and policy enforcement) can be self-hosted:

# Self-hosted management server via Docker Compose
curl -fsSL https://raw.githubusercontent.com/netbirdio/netbird/main/infrastructure_files/docker-compose.yml \
  -o docker-compose.yml
 
# Edit configuration
cp management.json.template management.json
# Configure OAuth provider, STUN/TURN servers
 
docker-compose up -d

Self-hosting gives you full control and removes the dependency on NetBird's SaaS. The trade-off: you now operate the management server, handle its availability, and manage its updates.

For most teams, the hosted version at cloud.netbird.io is the right starting point — it is free for up to 5 peers and small team plans are reasonable.

How It Compares to Tailscale

NetBird and Tailscale are solving the same problem and both use WireGuard under the hood. The differences:

Tailscale:

• More polished UI and user experience
• More mature, larger company, more enterprise features
• Not truly open source (control plane is proprietary)
• ACL language (HuJSON) is powerful but has a learning curve
• Better documentation and community

NetBird:

• Fully open source, including the management server
• Self-hostable control plane (Tailscale is not self-hostable in the same way)
• Simpler initial setup for basic use cases
• Smaller community, less mature
• Free tier is more generous

If self-hosting the control plane is important (compliance, data residency, cost at scale), NetBird wins. If you want the most polished experience and are comfortable with a proprietary control plane, Tailscale wins.

Cloudflare Access is different — it is a zero-trust access proxy, not a network overlay. Better for web applications and HTTP-based services, not for raw network access to clusters and databases.

What Works Well

The peer-to-peer tunneling is reliable. Once agents are connected, the connection is stable and fast. WireGuard's performance shows — SSH sessions feel native, kubectl commands are responsive.

Setup key management is clean. You generate setup keys for different purposes (production servers, developer machines, CI/CD) and the agents self-register. No manual certificate management.

Route advertisements work. You can configure a peer to advertise routes, making entire subnets (like your VPC CIDR) accessible through it. This is how you give developers access to a private EKS cluster without installing the agent on every pod.

Where It Falls Short

The UI has rough edges. The NetBird dashboard is functional but less polished than Tailscale's. Finding the right settings sometimes requires digging.

DNS integration is limited. Tailscale's MagicDNS is more seamless. NetBird does support DNS-based routing, but the configuration is more manual.

Windows client stability. On Linux and Mac the agent is solid. The Windows client has had occasional issues with reconnection after sleep/hibernate that require restarting the agent.

Smaller community. Fewer guides, Stack Overflow answers, and blog posts compared to Tailscale. When you hit an edge case, you are more likely to end up in GitHub Issues than finding an existing answer.

Real-World Setup: Cluster Access for Developers

The setup I found most useful:

1. Install NetBird agent on all Kubernetes nodes (or one bastion node in the cluster's VPC)
2. Configure that node to advertise the cluster's pod CIDR and service CIDR as routes
3. Add developers' machines to the engineering group
4. Create policy: engineering → cluster peers, all traffic

Result: developers kubectl directly to the cluster API server through the WireGuard tunnel, no kubectl port-forward, no bastion host SSH, no VPN client to configure per-developer.

Verdict

NetBird delivers on its core promise: a self-hostable, WireGuard-based overlay network with identity-aware access control. For teams that prioritize open source and self-hosting, it is a compelling alternative to both traditional VPNs and Tailscale.

The rough edges are real — less polished than Tailscale, smaller community, occasional client stability issues. But for DevOps teams comfortable with running their own infrastructure who want to eliminate VPN maintenance, NetBird is a solid choice.

Score: 7.5/10 — Does what it says, self-hostable, genuinely open source. Needs more polish and a larger community to be the obvious choice.

More networking tools? Check our Cilium eBPF networking guide and Kubernetes Gateway API guide.