Software Alternatives & Startups

Check NAT VS CloudLinux

Compare Check NAT VS CloudLinux and see what are their differences

Check NAT

Detect your network NAT type and public IP with our free online tool. Essential for gaming, P2P connections, and network troubleshooting.

Rating
0 reviews
Pricing
Free Free trial
CloudLinux

Making Linux secure, stable, and profitable for thousands of hosting providers and data centers worldwide.

Rating
0 reviews
Pricing
Open source
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Base details

Website, pricing, platforms and company facts side by side.

Check NAT
CloudLinux
Website natchecker.com cloudlinux.com
Pricing
Free Free trial
Open source
Platforms
Browser
—
Company Startup from the United States · 1 - 9 employees · 2025 —
Listed in

Features and specs

What each product offers, as listed by its team.

Check NAT 5 features
CloudLinux 5 features
  • Simple and Free NAT Detection
    Check NAT (natchecker.com) provides a straightforward, free-to-use tool for detecting your NAT type, making it accessible to anyone who needs to quickly diagnose their network configuration without paying for software.
  • Browser-Based Convenience
    The tool works directly in a web browser, requiring no software downloads or installations. Users can check their NAT type instantly from any device with a browser and internet connection.
  • Useful for Troubleshooting Connectivity Issues
    For gamers, VoIP users, and anyone experiencing peer-to-peer connectivity problems, the tool helps identify whether NAT type is the root cause, enabling more targeted troubleshooting.
  • Quick Results
    The NAT check process is fast, typically returning results within seconds, allowing users to quickly assess their network situation without lengthy diagnostic procedures.
  • Educational Value
    The site helps users understand NAT types and their implications, providing context about what different NAT types mean for connectivity, which is valuable for less technical users trying to learn about networking.
  • Enhanced Server Stability
    CloudLinux uses its lightweight virtualization technology (LVE) to isolate each tenant on a shared hosting server, preventing any single user from consuming excessive resources and crashing the server for everyone else. This ensures consistent uptime and performance.
  • Improved Security with HardenedPHP and KernelCare
    CloudLinux offers HardenedPHP, which patches old and unsupported PHP versions against known vulnerabilities, and KernelCare, which provides live kernel patching without requiring server reboots. These features significantly enhance server security posture.
  • Resource Limit Management
    Administrators can set granular resource limits (CPU, memory, I/O, number of processes, etc.) per user account using LVE Manager. This makes it easy to manage shared hosting environments and ensure fair resource distribution among tenants.
  • CageFS File System Virtualization
    CageFS creates a virtualized file system for each user, preventing them from seeing other users on the server, viewing sensitive configuration files, or exploiting server vulnerabilities. This adds an important layer of isolation and security.
  • Wide Compatibility with Hosting Panels
    CloudLinux integrates seamlessly with popular hosting control panels such as cPanel, Plesk, and DirectAdmin, making it straightforward for hosting providers to adopt without overhauling their existing infrastructure or workflows.

Possible disadvantages

  • Additional Licensing Cost
    CloudLinux requires a paid monthly or annual license on top of the base server cost. For smaller hosting providers or individual server owners, this additional expense can add up and may not always be justifiable compared to free alternatives.
  • Limited to CentOS/RHEL-Based Systems
    CloudLinux is built on top of RHEL/CentOS and does not support other Linux distributions like Ubuntu or Debian. This limits its adoption for hosting providers who prefer or already run non-RHEL-based environments.
  • Learning Curve for Configuration
    While CloudLinux provides powerful resource management tools, properly configuring LVE limits, CageFS, PHP Selector, and other features requires a solid understanding of the platform. Misconfiguration can lead to users being unnecessarily restricted or resources being poorly allocated.
  • Potential Performance Overhead
    The additional layers of virtualization, resource monitoring, and file system isolation introduced by CloudLinux can impose a slight performance overhead on the server compared to running a bare, unmodified Linux distribution without these controls.
  • Dependency on CloudLinux Ecosystem
    Adopting CloudLinux means relying on their ecosystem for kernel updates, PHP patches, and security fixes. If the company experiences delays in releasing patches or changes its pricing/licensing model, hosting providers may find themselves locked into a dependency that is difficult to migrate away from.

Analysis

An editorial look at what each product does well and who it suits.

Check NAT
CloudLinux

Overall verdict

  • Check NAT (natchecker.com) appears to be a simple utility site for detecting NAT type and connectivity status, useful for troubleshooting online gaming, VoIP, or peer-to-peer connection issues. As a niche diagnostic tool, it can be handy and convenient, though users should verify its accuracy against other established NAT-checking methods (like console network tests or router documentation) since it's a lesser-known third-party service.

Why this product is good

  • Provides a quick, free way to check your NAT type (Open, Moderate, Strict) without digging through router settings
  • Useful for diagnosing connectivity issues in online multiplayer games or voice chat applications
  • Simple, no-installation web-based tool that's accessible from any browser
  • Can help identify if port forwarding or UPnP settings are working correctly

Recommended for

  • Gamers troubleshooting matchmaking or voice chat connectivity problems
  • Users setting up port forwarding and wanting to verify configuration
  • People experiencing P2P or VoIP connection drops due to NAT restrictions
  • Anyone wanting a fast, no-frills check without accessing router admin pages

Overall verdict

  • CloudLinux is a well-regarded, mature Linux OS distribution and toolset specifically designed for shared hosting and multi-tenant server environments, offering strong isolation, resource management, and security features that make it a solid choice for hosting providers.

Why this product is good

  • Provides LVE (Lightweight Virtual Environment) technology for per-tenant resource isolation, preventing 'bad neighbor' effects on shared servers
  • Enhances server stability and security by isolating users so that one account's issues (crashes, resource spikes) don't affect others
  • Offers extended lifecycle support (longer than standard CentOS/RHEL support windows), which is valuable for legacy systems
  • Includes tools like CloudLinux OS Shield, Imunify360 integration, and hardened kernel options for improved security
  • Compatible with popular control panels like cPanel and Plesk, making it easy to integrate into existing hosting stacks
  • Backed by an established company with a long track record in the hosting industry and responsive support
  • Offers granular control over CPU, memory, I/O, and other resources per user account
  • Provides PHP Selector and multiple PHP version support, useful for hosting providers serving diverse client needs

Recommended for

  • Web hosting companies running shared or reseller hosting environments
  • Hosting providers needing to isolate customer accounts on the same physical server
  • Businesses requiring extended OS support lifecycles beyond standard RHEL/CentOS EOL dates
  • Enterprises using cPanel or Plesk that want tighter security and resource control
  • Hosting companies looking to reduce support tickets caused by noisy-neighbor resource contention
  • IT teams managing multi-tenant infrastructure who need governance and monitoring tools built into the OS layer

Videos

Walkthroughs and reviews on video.

Check NAT 0 videos + Add
CloudLinux 3 videos + Add

No Check NAT videos yet. You could help us improve this page by suggesting one.

When To Use Cloudlinux On Your Virtual Private Server (VPS)

More videos

  • - CloudLinux OS+ in a minute: Explore Features
  • - How CloudLinux Plans to Keep CentOS 6 Alive

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Check NAT
CloudLinux
100% 100%
0% 0%
0% 0%
100% 100%
100% 100%
0% 0%
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100% 100%

Questions & Answers

As answered by people managing Check NAT and CloudLinux.

What's the story behind your product?

Check NAT's answer

Help people know their nat type, for gaming, network inpsecting.

Who are some of the biggest customers of your product?

Check NAT's answer

Programmer, network operation and maintenance personnel

What makes your product unique?

Check NAT's answer

We are Free And Online Forever!!

Why should a person choose your product over its competitors?

Check NAT's answer

This tool is very interactive and the results are accurate and fast.

How would you describe the primary audience of your product?

Check NAT's answer

Programmer, network operation and maintenance personnel

Which are the primary technologies used for building your product?

Check NAT's answer

I use next.js to build my product

User comments

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Alternatives to Check NAT and CloudLinux

When comparing Check NAT and CloudLinux, you can also consider the following products.