Alma Linux / Rocky Linux / Amazon Linux / RHEL


Convenient Web tools to Linux Server

Open source Linux is also changing. Even applications that are considered to be the latest version or stable version have a short lifespan.

Qualys. SSL Labs

SSL Labs is a collection of documents, tools and thoughts related to SSL.

MX Super Tools

All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.


PageSpeed suggestions to make your web site faster through our online tool.



AlmaLinux JP

AlmaLinux OS is binary compatible with RHEL®.


web apps, APIs & websites with WAF, DDoS, CDN, DNS & more.