If you run any kind of email server, understanding which ports to use and how to secure them isn’t just a technical nicety—it’s essential for keeping your mail flowing and …

If you’re running Docker containers in production, there’s a good chance you’ve accidentally exposed more than you intended to the internet.

If you’re running a server, there’s a good chance you’ve installed applications over time without keeping a detailed inventory of what’s actually listening on your network ports.

If you’re running a server in 2026, having FTP (port 21) or Telnet (port 23) open is like leaving your front door unlocked in a high-crime neighborhood.

When I first started managing Linux servers about fifteen years ago, one of the earliest ”security tips” everyone shared was changing SSH from port 22 to something obscure.

If you’re running database servers, chances are you’ve got ports 5432, 3306, or 27017 exposed to the internet – and that’s a massive security risk.

If you manage any server or network infrastructure, you’re constantly being scanned.

If you’ve ever wondered why some websites show that reassuring padlock icon while others don’t, you’re looking at the difference between HTTP and HTTPS in action.

If you’re responsible for maintaining compliance standards like PCI DSS, HIPAA, or ISO 27001, you already know that auditors don’t just want to see security measures in place—they want proof …

If you’re running port scans on your servers and wondering what to do with all those open ports you’ve discovered, you’re only halfway there.

You’ve configured your firewall rules carefully. You’ve closed all unnecessary ports, set up strict access controls, and maybe even implemented intrusion detection.

Looking at your server’s open ports can be alarming. When I first ran a port scan on one of my production servers a few years back, I discovered 23 open …

Every server connected to the internet is a potential target. The more services you expose, the more opportunities attackers have to find a way in.

If you’re running any kind of server infrastructure, you’ve probably heard the advice to ”close unused ports” so many times it sounds like a cliché.

Here’s something that keeps me up at night: most companies have no idea what ports are actually open on their servers right now.

If you’re running a public-facing server, you’re essentially standing at the front door of your digital property.

Most system administrators run regular internal security audits, check their firewall rules, and feel confident their server is locked down.

If you’re responsible for server security, you’ve probably heard both terms thrown around: port monitoring and vulnerability scanning.

If you’re running any kind of server or web service, you’ve probably heard security experts talk about ”attack surface” like it’s some mysterious technical concept.

Every server connected to the internet has dozens of potential entry points, and most system administrators don’t realize how many of them are sitting wide open.

I’ve been running servers for years, and if there’s one thing I’ve learned the hard way, it’s that hackers aren’t creative when they first probe your infrastructure.

Running a server means you’re essentially operating a house with multiple doors and windows.