Email communication, a cornerstone of the internet, relies on a complex interplay of protocols and ports to ensure your messages reach their destination. Understanding these ports, their common names, and the security they offer is crucial for anyone managing an email server or simply curious about how email works. This article will delve into the essential TCP and UDP ports associated with email servers.
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Tick-Tock, Goes the Epoch: Unlocking the Secret Language of Time (for Computers, Not You)
Ever feel like your computer is secretly judging your archaic notions of “Tuesday” or “December”? Well, it probably is. While you’re over here with your quaint “day-month-year” shenanigans, your digital overlords are speaking a much cooler, much simpler language: Epoch Time.
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Custom Fail2Ban Filters: A Step-by-Step Tutorial
Fail2Ban comes with many built-in filters for common services like SSH, Apache, and Postfix. But for custom applications, web apps (e.g., WordPress login attempts), or specific log patterns, you’ll need to create your own filters. This allows Fail2Ban to detect unique failure patterns and ban offending IPs automatically.
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