Difficulty Level : Hard
Category: Sysadmin
Hello folks, It’s been a long time since I wrote my last blog. In this blog post, I will show you how you do port knocking to access services on servers such as ssh, mail (postfix), etc securely. Well, we will be literally knocking on ports from the client-side this time 😉 What is port […]
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Knock Knock… Who’s There ? … /dev/tcp
Did you ever wonder what would you do if telnet or netcat package is missing for Unix/Linux system. Being a sysadmin, you often come across a situation where you want to find out if target system is listening on given port. With simple tools like telnet or netcat your job becomes easy. These utility packages […]