CommunityDevOps ExchangePartners
10 minutes

Taking A Deeper Dive Into Cloud Native: Firewall Technology Compatibility With Containers

Written by
Team Copado
Table of contents

A cloud native approach to development helps DevOps organizations streamline release cycles and take advantage of the speed, reliability, and scalability of cloud-based infrastructure. However, cloud native applications require different security strategies than traditional web applications.

Monolithic web apps, whether they’re hosted on-premises or in the cloud, are typically protected by an appliance called a web application firewall (WAF). A WAF applies a set of firewall rules to an HTTP session, defending against common attacks like Cross-Site Scripting (XSS) and SQL injections and other common vulnerabilities. However, traditional WAFs can’t address the specific security challenges presented by containerized environments, which is why cloud native applications require cloud native firewall technology.

Cloud Native Firewall Challenges

Cloud native container environments operate differently from traditional environments, which creates certain challenges for network security.

Containers generally use an overlay network to encapsulate and encrypt network traffic between nodes. The IP addresses of endpoints are largely irrelevant in such a network. Plus, endpoint IP addresses are ephemeral, so they frequently change. Traditional firewall rules, like “from to allow tcp/27031,” aren’t useful for containerized environments because you don’t know (and usually don’t care about) each endpoint’s IP address.


In Amazon Elastic Kubernetes Service (EKS), you can have pods that get IP addresses directly from your Virtual Private Clouds in AWS. Operating without an overlay network can affect how you put security in place.

Another characteristic of cloud native applications is the ability to auto-scale, which means new containers automatically spin up and down and serverless functions automatically run and delete according to current demands. Traditional WAFs aren’t equipped to automatically scale, so you often need to manually upgrade their capacity and update firewall rules to account for a sudden increase in new instances.

How Cloud Native Firewall Technology Works

Cloud native firewall technology is designed specifically to protect cloud native environments. There are two basic functions required of cloud native firewalls:

  1. Protecting the cluster from the outside world.
  2. Securing the connections between individual containers, pods, and namespaces within a cluster.

Cloud native container platforms often provide some built-in security and firewall capabilities. For instance, Kubernetes allows you to create network policies that determine how pods can communicate with pods in other namespaces within a cluster. AWS allows you to create security groups and network ACLs to protect traffic between different VPCs (virtual private clouds) and subnets.

Companies like Cisco and Palo Alto Networks have also developed cloud native network firewalls that address the security challenges specific to containerized environments. Cloud native network firewalls are applications or services that run directly from your cloud (e.g., AWS). These virtual services use automatic discovery to locate all the entities in your environment, giving you a visual network topology of containerized apps and hosts. Cloud native firewalls use this discovery process to identify agents they can use that run inside each host, function, or VM. You can create microsegments and firewall rules that are bound to these agents instead of ephemeral IP addresses.

In addition, firewall as a service (FWaaS) takes advanced firewall technology like that found in next-generation firewalls (NGFWs) and makes it available as a cloud-based service. While FWaaS isn’t intended specifically for containerized environments, it is cloud native and is meant to protect cloud resources. The benefit of FWaaS is that it allows you to apply enterprise security policies to the cloud, so you have consistent protection. This is also useful for compliance with regulations like SOC2 or PCI, which have specific firewall security requirements that can be difficult to meet in a cloud environment. Some container platforms have built-in FWaaS capabilities, but there are also third-party platforms that integrate with cloud native applications as well as other cloud resources, giving you centralized network security management across your cloud infrastructure.

Securing Cloud Native Apps with Cloud Native Firewall Technology

Keeping your cloud native applications secure will require a multilayered defense. You need a firewall that can inspect north-south traffic, meaning the traffic flowing between your clusters and the outside world, to prevent and detect attacks. You also need to monitor east-west traffic, which is the traffic between containers and nodes within your clusters, so you can limit the lateral movement of an attacker who has breached your external perimeter.

There is cloud native firewall technology to cover each of these tasks in a containerized environment. Inbuilt firewall capabilities govern communication between pods, namespaces, VPCs, and subnets. Cloud native network firewalls are mostly concerned with monitoring and inspecting east-west traffic on layer 4 of the OSI model, but some also protect traffic to and from external networks. Finally, FWaaS technology acts like a traditional firewall in that it protects the outer perimeter of your cloud environments by monitoring north-south traffic. Combining all three technologies allows you to protect your cloud native applications with the same level of security as your on-premises environments.



Book a demo

About The Author

#1 DevOps Platform for Salesforce

We build unstoppable teams by equipping DevOps professionals with the platform, tools and training they need to make release days obsolete. Work smarter, not longer.

Enhancing Customer Service with CopadoGPT Technology
What is Efficient Low Code Deployment?
Copado Launches Test Copilot to Deliver AI-powered Rapid Test Creation
Cloud-Native Testing Automation: A Comprehensive Guide
A Guide to Effective Change Management in Salesforce for DevOps Teams
Building a Scalable Governance Framework for Sustainable Value
Copado Launches Copado Explorer to Simplify and Streamline Testing on Salesforce
Exploring Top Cloud Automation Testing Tools
Master Salesforce DevOps with Copado Robotic Testing
Exploratory Testing vs. Automated Testing: Finding the Right Balance
A Guide to Salesforce Source Control
A Guide to DevOps Branching Strategies
Family Time vs. Mobile App Release Days: Can Test Automation Help Us Have Both?
How to Resolve Salesforce Merge Conflicts: A Guide
Copado Expands Beta Access to CopadoGPT for All Customers, Revolutionizing SaaS DevOps with AI
Is Mobile Test Automation Unnecessarily Hard? A Guide to Simplify Mobile Test Automation
From Silos to Streamlined Development: Tarun’s Tale of DevOps Success
Simplified Scaling: 10 Ways to Grow Your Salesforce Development Practice
What is Salesforce Incident Management?
What Is Automated Salesforce Testing? Choosing the Right Automation Tool for Salesforce
Copado Appoints Seasoned Sales Executive Bob Grewal to Chief Revenue Officer
Business Benefits of DevOps: A Guide
Copado Brings Generative AI to Its DevOps Platform to Improve Software Development for Enterprise SaaS
Celebrating 10 Years of Copado: A Decade of DevOps Evolution and Growth
Copado Celebrates 10 Years of DevOps for Enterprise SaaS Solutions
5 Reasons Why Copado = Less Divorces for Developers
What is DevOps? Build a Successful DevOps Ecosystem with Copado’s Best Practices
Scaling App Development While Meeting Security Standards
5 Data Deploy Features You Don’t Want to Miss
Top 5 Reasons I Choose Copado for Salesforce Development
How to Elevate Customer Experiences with Automated Testing
Getting Started With Value Stream Maps
Copado and nCino Partner to Provide Proven DevOps Tools for Financial Institutions
Unlocking Success with Copado: Mission-Critical Tools for Developers
How Automated Testing Enables DevOps Efficiency
How to Keep Salesforce Sandboxes in Sync
How to Switch from Manual to Automated Testing with Robotic Testing
Best Practices to Prevent Merge Conflicts with Copado 1 Platform
Software Bugs: The Three Causes of Programming Errors
How Does Copado Solve Release Readiness Roadblocks?
Why I Choose Copado Robotic Testing for my Test Automation
How to schedule a Function and Job Template in DevOps: A Step-by-Step Guide
Delivering Quality nCino Experiences with Automated Deployments and Testing
Best Practices Matter for Accelerated Salesforce Release Management
Maximize Your Code Quality, Security and performance with Copado Salesforce Code Analyzer
Upgrade Your Test Automation Game: The Benefits of Switching from Selenium to a More Advanced Platform
Three Takeaways From Copa Community Day
Cloud Native Applications: 5 Characteristics to Look for in the Right Tools
Using Salesforce nCino Architecture for Best Testing Results
How To Develop A Salesforce Testing Strategy For Your Enterprise
What Is Multi Cloud: Key Use Cases and Benefits for Enterprise Settings
5 Steps to Building a Salesforce Center of Excellence for Government Agencies
Salesforce UI testing: Benefits to Staying on Top of Updates
Benefits of UI Test Automation and Why You Should Care
Types of Salesforce Testing and When To Use Them
Copado + DataColada: Enabling CI/CD for Developers Across APAC
What is Salesforce API Testing and It Why Should Be Automated
Machine Learning Models: Adapting Data Patterns With Copado For AI Test Automation
Automated Testing Benefits: The Case For As Little Manual Testing As Possible
Beyond Selenium: Low Code Testing To Maximize Speed and Quality
UI Testing Best Practices: From Implementation to Automation
How Agile Test Automation Helps You Develop Better and Faster
Salesforce Test Cases: Knowing When to Test
DevOps Quality Assurance: Major Pitfalls and Challenges
11 Characteristics of Advanced Persistent Threats (APTs) That Set Them Apart
7 Key Compliance Regulations Relating to Data Storage
7 Ways Digital Transformation Consulting Revolutionizes Your Business
6 Top Cloud Security Trends
API Management Best Practices
Applying a Zero Trust Infrastructure in Kubernetes
Building a Data Pipeline Architecture Based on Best Practices Brings the Biggest Rewards
CI/CD Methodology vs. CI/CD Mentality: How to Meet Your Workflow Goals
DevOps to DevSecOps: How to Build Security into the Development Lifecycle
DevSecOps vs Agile: It’s Not Either/Or
How to Create a Digital Transformation Roadmap to Success
Infrastructure As Code: Overcome the Barriers to Effective Network Automation
Leveraging Compliance Automation Tools to Mitigate Risk
Moving Forward with These CI/CD Best Practices
Top 3 Data Compliance Challenges of Tomorrow and the Solutions You Need Today
Top 6 Cloud Security Management Policies and Procedures to Protect Your Business
What are the Benefits of Principle of Least Privilege (POLP) for My Organization?
You Can’t Measure What You Can’t See: Getting to know the 4 Metrics of Software Delivery Performance
How the Public Sector Can Continue to Accelerate Modernization
Building an Automated Test Framework to Streamline Deployments