Securing Cloud Apps: Penetration Testing in Multi-Cloud

Most organizations with cloud operations now view cloud security network as a significant priority. This is especially true for organizations operating in a hybrid or multi-cloud environment. In this blog, we will look at 20 recommended cloud security best practices that organizations can implement during their cloud adoption process to ensure their environments remain secure from cyberattacks.

20 Best Cloud Security Practices to Check Out in 2025

A strong understanding of cloud native application security will allow organizations to improve their security measures as organizations move forward in their process towards cloud adoption. Below are the 20 best cloud practices to check out in 2025:

1. Understand Shared Responsibility

Each of the leading cloud service providers (CSPs) — AWS, Azure, and Google Cloud — utilizes a “shared responsibility model for cloud security.” The cloud provider assumes responsibility for several facets of security, but the customer still must enable security at the application layer as well as the infrastructure layer.

For IaaS deployments, customers must implement safeguards to secure the operating system (OS) of a virtual machine (VM), implement regular patch management, correctly configure its firewall, and implement virus and malware protection, among other things.

In PaaS deployments, while cloud providers are responsible for VM-level protection, customers are responsible for implementing their own security at the application and data level.

In SaaS deployments, the cloud provider makes the majority of the security controls during application development, while customers don’t typically assume security obligations except for usage and access policies.

2. Secure the Perimeter

As cloud networks are enabled and constructed on software-defined networking (SDN), it is easier to implement multilayer security guardrails.

Attacks, including SQL injection, data exposure, and cross-site scripting, are just a few of the application security threats that a web application firewall (WAF), based on OWASP threat detection rules, can help identify and protect against.

In addition, there is no way to avoid a multilayer distributed denial-of-service (DDoS) defense strategy to help protect workloads from organized DDoS attacks in the cloud. DDoS mitigation tools are offered as services by all cloud service providers, allowing integration options with your application front end for attack detection and protection.

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3. Monitor For Misconfigurations

Successful compromises of cloud workloads result primarily from service misconfigurations and errors in manual configuration. It is advisable to integrate cloud security posture management (CSPM) solutions into your architecture so that they can provide dynamic recognition of application or service misconfigurations that may find their way into your cloud deployment.

CSPM solutions are advantageous as they evaluate your deployments against a set of best practice criteria – either specific to your organization or aligned to industry-leading security and compliance benchmarks.

CSPM solutions provide a security score that marks your current state of security for all your cloud workloads. These tools will also identify misaligned practices, enabling customers to take necessary corrective action.

4. Use Identity and Access Management

When thinking about your cloud workload, the control plane security is very important because the control plane is the key to the kingdom. You will have to use the identity and access management services that are native to your cloud platform to enable role-based, direct access to cloud resources.

Most cloud platforms also provide tools to facilitate the integration of on-premises solutions such as Active Directory into cloud-based identity and access management (IAM) services; this can provide seamless single sign-on (SSO) capabilities for users for cloud-hosted workloads. When thinking about IAM controls, there are some pitfalls, but the general rule of thumb is to act with the least privilege.

5. Enable Security Posture Visibility

As cloud usage matures, the likelihood of a breach going unreported also increases. Having the right tools to aid in providing visibility of your security posture is imperative for proactive security management.

All the leading cloud platforms have an advanced/premium version of a native CSPM solution that can provide unwanted detection of data exfiltration, event threats, IAM account hijacks, cryptomining, and others. Please also note that the scope of these features will largely be tied to their respective cloud platform.

6. Implement Cloud Security Policies

Organizations should establish cloud security policies to apply organization-wide restrictions and enforce security. These policies could include restrictions on deploying workloads that utilize public IPs, restricting east-west traffic, or monitoring containers’ workload traffic behavior.

The implementation method is different for each service provider. In Azure Cloud App Security, customers apply Azure Policies. In Google Cloud, customers apply organizational policies. The advantage of incorporating security policies is the ability to auto-enforce the compliance standard organization-wide in cloud deployments.

7. Secure Your Containers

Container security encompasses securing both the containers themselves and their orchestration platform. Kubernetes is the most commonly used container orchestration platform in the cloud. Industry-standard security baselines need to be developed for specific workloads, with continuous monitoring and reports generated for any baseline deviations.

Organizations need tools that can detect any malicious activities happening in containers, even during runtime.

8. Perform Vulnerability Assessment and Remediation

You should employ a real-time vulnerability scanning and remediation service to safeguard your workloads from viruses and malware attacks.

Consider a vulnerability management solution that continuously scans workloads for vulnerabilities, creates reports and presents outcomes on dashboards, and automatically remediates issues.

9. Implement a Zero Trust Approach

The Zero Trust (also known as assume breach) approach is the best practice for enabling cloud security. It means trusting no services, even while they are within your organization’s security perimeter.

The core principles of the Zero Trust approach consist of segmentation of services and the least amount of communication possible between applications. You should only communicate via authorized identities.

This communication within an application, or with external resources, should be monitored, logged, reviewed for anomalies, and then monitored for breaches. This same concept applies to any admin activity as well. Here, you can use either existing monitoring and logging tools that the cloud service provides, or you can use vendor tools that you use externally.

10. Implement a Cybersecurity Training Program

There are several tools available to protect the cloud from a variety of adversaries, but many cybersecurity experts have come to appreciate the benefits of being proactive about cybersecurity.

A first step towards embedding cybersecurity into an organization’s culture and making it a priority for employees and other stakeholders is to offer a holistic security training program. Ensure the program covers the most common adversaries in your industry and explains their attack methods.

11. Use Log Management and Continuous Monitoring

Companies need to have logging capabilities turned on within their cloud infrastructure to have complete visibility into their networks and, if necessary, to quickly identify any unusual activity to remediate it. Within your log management tool, be sure to turn on notifications so that you can find out in real time about any unusual activities.

12. Conduct Penetration Testing

Organizations should conduct penetration tests (also called pen tests) as well as perform vulnerability assessments. Performing pen tests can assess whether your organization’s security controls are sufficient to protect the applications and the environment. Because the white hat hackers act as adversaries, the pen testing process is often referred to as “ethical hacking.”

13. Encrypt Your Data

Cloud data encryption is an essential component of your overall cloud security strategy. An effective encryption strategy allows applications based in the cloud to share data in a secure way that hides data from unauthorized users (i.e., you protect cloud data from unauthorized users). To have the best protection, the data should be encrypted both in the cloud and in transit.

14. Meet Compliance Requirements

Like any product, service, or process, you should always consider cloud and data compliance requirements as a part of your cloud security solutions and strategies. By ensuring compliance, you can guarantee that you are meeting the standards defined by laws or regulations to protect customers. An effective cloud security solution accounts for compliance at every part of the process.

15. Implement an Incident Response Plan

In the case of cybersecurity, an organization that has an incident response plan in the event of a breach will be in a much better position to remediate the situation, avoid operational interruption, and recover any lost data.

Incident response plans are intended to ensure that your security teams react in the most efficient way in the event of an attack. Think of the plan as a remediation framework that describes the roles and responsibilities of each team member so that they know what they have to do in each scenario.

16. Secure All Applications

Continuous integration/continuous deployment (CI/CD) and cloud technologies have allowed organizations around the world to create, deliver, and update applications at an extraordinary pace. Continuous updates to application code have created ongoing exposure for security teams to address. Application security posture management (ASPM) tools can help identify application vulnerabilities, assess risks, and prioritize mitigations.

17. Keep Data Security Posture in Mind

Using a data security posture management (DSPM) solution increases your ability to discover, classify, and protect sensitive data, like personally identifiable information (PII), information that is subject to Payment Card Industry (PCI) regulations, and protected health information (PHI) — from loss, theft, misuse, and unauthorized access.

18. Consolidate Your Cybersecurity Solutions

According to Gartner, “An organization could implement 10 or more tools to deliver against the capabilities fully. There are reasons that organizations are moving toward a CNAPP offering.” Cybersecurity platform consolidation integrates various security tools and systems into a single platform, thereby supporting operational security, enhancing security posture, and improving development workflows.

This organizational simplification decreases complexity and promotes consistent security policies that promote effective risk management. Implementing and integrating security testing in the development life cycle promotes early detection of issues, accelerating deployments. Furthermore, consolidation eliminates overlapping capabilities and promotes visibility from the runtime to development and vice versa to bolster security and interoperability.

19. Leverage a Cloud Detection and Response Approach

Enterprises are transitioning to a cloud detection and response (CDR) security approach to mitigate common challenges and gaps relating to cloud environments. The CDR approach focuses on specific capabilities, including threat detection, immediate incident response, and integrated services, to support the objectives of cloud, innovation, and data sovereignty.

20. Stay Protected With Qualysec Cloud Security

Qualysec Cloud Security Services unifies and consolidates all the security controls described above into a single solution to optimize security operations. The platform integrates multiple point solutions for protecting and monitoring workloads across endpoints, clouds, identities, and data, providing a single entity that offers end-to-end coverage and eliminates complexity.

The unified view allows defenders to understand and trace adversarial behavior and the development of attacks without flipping between different consoles just to get a reliable visual representation of risk. The Qualysec unified approach combines monitoring from cloud-native agents and agentless protections in areas where deploying software proves to be an imposition. Cloud Security provides comprehensive visibility across the entire cloud estate with a single agent, console, and UI.

Replacing disparate tools with Qualysec Cloud Security’s cloud-native application protection platform (CNAPP) capabilities also reduces operational overhead for managing licenses. It empowers security groups to quickly push policies across accounts, regions, projects, and virtual networks.

Conclusion

Following these 20 excellent cloud protection practices enables you to shield your information, decrease risks, and show compliance. Being proactive and vigilant enables groups to leverage the benefits of the cloud securely, while maintaining a strong safety posture and operational resilience.

FAQ

1. What is cloud application security?

Application security in cloud computing involves protecting programs hosted on the cloud from threats through controls, access management, data encryption, compliance monitoring, and risk detection across the application lifecycle.

2. What are the best practices for securing cloud applications?

Best practices for securing applications inside the cloud encompass utilizing sturdy identification and access controls, using encryption, applying patches regularly, permitting logging and tracking, performing vulnerability tests, and using the shared responsibility model for cloud protection.

3. Which tools help in securing applications on the cloud?

Tools that help steady packages in the cloud are AWS Security Hub, Azure Security Center, Google Cloud Armor, Prisma Cloud, Trend Micro Cloud One, and Check Point CloudGuard, all of which monitor, locate, and respond to cloud security threats.