Kubernetes NetworkPolicy Generator

Generate Kubernetes NetworkPolicy YAML for default deny, ingress, egress, namespace selectors, pod selectors, ipBlock, and service access rules.

Output:A ready-to-use configuration file for Kubernetes NetworkPolicy with best practices applied.

Metadata

Policy Name

Policy Target & Types

Pod Selector (csv)

Pods matching these labels are governed by this policy. Empty = all pods.

Control Incoming Traffic (Ingress)- Restrict who can send traffic TO the selected pods

Control Outgoing Traffic (Egress)- Restrict where selected pods can SEND traffic

Ingress Rules (Allowed Incoming Traffic Sources)

From Namespace Labels (csv)

Allow from all pods in matching namespaces

From Pod Labels (csv)

Allow from pods matching these labels

Allowed Ports (csv)

Egress Rules (Allowed Outgoing Traffic Destinations)

To Namespace Labels (csv)

To Pod Labels (csv)

Allowed Ports (csv)

To Namespace Labels (csv)

To Pod Labels (csv)

Allowed Ports (csv)

Quick Summary

Use a Kubernetes NetworkPolicy Generator to create networkpolicy.yaml for restricting pod-to-pod, namespace, IP block, ingress, and egress traffic securely.

What is this tool?

Kubernetes uses YAML to define its resources. Using a generator ensures your syntax is correct and you don't miss important fields.

How to Use This Tool

Input your resource name and metadata.
Configure the specific properties.
Review the generated YAML.
Copy the YAML or download it as a file.

What This Tool Generates

manifest.yaml

Security Notes

Always review generated YAML before applying it to production clusters.
Use RBAC to restrict who can apply manifests.

Testing Instructions

Test your generated manifests against your cluster before deploying:
kubectl apply --dry-run=server -f manifest.yaml

Frequently Asked Questions

What is Kubernetes NetworkPolicy?

A NetworkPolicy is a specification of how groups of Pods are allowed to communicate with each other and other network endpoints.

How do I create a default deny policy?

You create a NetworkPolicy that selects all pods (`podSelector: {}`) and provides empty lists for ingress and egress, dropping all traffic by default.

What is the difference between podSelector and namespaceSelector?

podSelector filters traffic based on the labels of the Pods within the same namespace. namespaceSelector filters traffic coming from or going to entire namespaces.

Does NetworkPolicy require a specific CNI?

Yes, NetworkPolicies are implemented by the network plugin (CNI). If you use a CNI that does not support it (like basic Flannel), the rules will be ignored.

How to test Kubernetes NetworkPolicy?

Use tools like `kubectl auth can-i`, or spin up a temporary curl pod (`kubectl run -it --rm`) to verify whether the connection drops or succeeds.

How We Keep Your Configs Safe & Valid

Built-in Error Checking

Every file is checked against official rules. We catch missing fields and bad syntax. YAML indentation errors are flagged right away. Kubernetes, Terraform, and Docker specs are all covered. API versions and labels are verified too. You get valid output every time you generate.

100% Private & Local

All tools run in your browser only. Your API keys never leave your machine. We do not use any tracking scripts. No data is sent to any server. Passwords and secrets stay on your device. Crypto operations use the Web Crypto API. Your privacy is fully protected at all times.

Secure Settings by Default

Configs use safe defaults out of the box. Containers run as non-root users. Root filesystems are set to read-only. Dangerous Linux capabilities are dropped. Network policies limit pod-to-pod traffic. TLS 1.3 is enabled for web servers. Security headers are added where needed.

Ready for CI/CD & Git

Output files are ready for your Git repo. Use them with ArgoCD, Flux, or GitHub Actions. Files use clear formatting and comments. Code review is easy for your team. Indentation and key order are consistent. Test in staging before going to production. Every file is clean and well-structured.

Infrastructure as Code

Store configs in Git alongside your code. Terraform modules include typed variables. Backend configs support remote state locking. Outputs work across multiple modules. Ansible playbooks use clear task steps. Chef and Puppet configs are also supported. Every file works with version control tools.

Monitoring & Tracing

Set up Prometheus with auto-discovery rules. Create Grafana dashboards with template variables. Add alerting rules with severity labels. Use OpenTelemetry for trace collection. Forward logs to Loki or Elasticsearch. Connect to Jaeger or Tempo for tracing. Monitor metrics, logs, and traces together.

Container & Docker Safety

Dockerfiles use multi-stage builds for small images. Base images are pinned to exact versions. Dev files are excluded from final images. Health checks are added for orchestrator use. Containers switch to non-root users. Docker Compose uses named volumes and networks. Resource limits are set in deploy configs.

Multiple Output Formats

Export as YAML, JSON, HCL, or TOML. Kubernetes uses YAML with proper separators. Terraform uses HCL with correct escaping. JSON output has consistent indentation. Copy to clipboard with one click. Preview output with syntax highlighting. Line numbers help you review quickly.