JR IT Services

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Website title: JR IT Services – Professionelle Beratung hinsichtlich Architektur, Design und Entwicklung im Microsoft .NET Umfeld

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Securing a Rocky Linux 10 Server with Fail2Ban20 days ago

Introduction A practical, production-ready setup for SSH, Postfix, Dovecot and HTTPD — plus monitoring & reporting scripts Rocky Linux 10 continues the RHEL tradition of being a stable, long-term server operating system. But stability alone does not equal security. Any

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Fixing the postfix index file creation error (file too large [process was started with ulimit -f limit)20 days ago

Fixing the Persistent Postfix Error: “process was started with ulimit -f limit” on Rocky Linux If you’re running Postfix with Dovecot on Rocky Linux and keep seeing the error: process was started with ulimit -f limit even after adjusting system

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Building a Modern Mail Server on Rocky Linux 1022 days ago

Introduction Postfix, Dovecot, Rspamd, DKIM & ARC — Done Right Running your own mail server is still one of the most demanding infrastructure tasks. Modern mail delivery is no longer just SMTP — it is a trust pipeline involving SPF,

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