apiVersion: networking.k8s.io/v1 kind: NetworkPolicy metadata: name: allow-api-to-db spec: podSelector: matchLabels: app: database ingress:

• from:
• podSelector: matchLabels: app: api ports:
• port: 5432 ```

Runtime Security Monitoring

Falco is an open source runtime security tool that detects anomalous behavior in containers:

Install Falco
curl -fsSL https://falco.org/repo/falcosecurity-packages.asc | sudo gpg --dearmor -o /usr/share/keyrings/falco-archive-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/falco-archive-keyring.gpg] https://download.falco.org/packages/deb stable main" | sudo tee /etc/apt/sources.list.d/falcosecurity.list
sudo apt update && sudo apt install falco

Falco detects events like:

• Shell spawned inside a container
• Sensitive file read (/etc/shadow, /proc/*/mem)
• Package manager executed inside a container
• Network connection from unexpected container

Quick Security Checklist

• Non-root user configured in Dockerfile
• Minimal base image (slim, alpine, or distroless)
• No secrets in Dockerfile or image layers
• Image scanned with Trivy in CI
• Capabilities dropped (--cap-drop=ALL)
• Read-only root filesystem
• Network segmentation between services
• Resource limits set (CPU and memory)
• Health checks defined
• Container logs shipped to centralized logging

Frequently Asked Questions

Who is this article written for?

This article is written for developers, technical professionals, and power users who want practical guidance. Whether you are evaluating options or implementing a solution, the information here focuses on real-world applicability rather than theoretical overviews.

How current is the information in this article?

We update articles regularly to reflect the latest changes. However, tools and platforms evolve quickly. Always verify specific feature availability and pricing directly on the official website before making purchasing decisions.

Are there free alternatives available?

Free alternatives exist for most tool categories, though they typically come with limitations on features, usage volume, or support. Open-source options can fill some gaps if you are willing to handle setup and maintenance yourself. Evaluate whether the time savings from a paid tool justify the cost for your situation.

Can I trust these tools with sensitive data?

Review each tool’s privacy policy, data handling practices, and security certifications before using it with sensitive data. Look for SOC 2 compliance, encryption in transit and at rest, and clear data retention policies. Enterprise tiers often include stronger privacy guarantees.

What is the learning curve like?

Most tools discussed here can be used productively within a few hours. Mastering advanced features takes 1-2 weeks of regular use. Focus on the 20% of features that cover 80% of your needs first, then explore advanced capabilities as specific needs arise.

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