As comment of the article Knockd, to secure your ports, i’ve received: “Port knocking is bad idea; a very bad idea. Port knocking is, in the end, a password. A sniffable one that is subject to man-in-the-middle attacks so you can’t even use one-time-passwords and be secure. Public/private key pairs and/or one-time-passwords (opie, skey and […]
Today, i’ll show you how to use knockd to improve the security of your linux server, the more common use that i’ve saw so far is: “i’d like to connect on port 22 (ssh) but i don’t want to leave to port open for everyone..and i’ve a dynamic IP”. In these cases you can close […]
In this article I want to show some use, not trivial, of ssh, but first: What is SSH? From Wikipedia: Secure Shell or SSH is a network protocol that allows data to be exchanged using a secure channel between two networked devices. The two major versions of the protocol are referred to as SSH1 or SSH-1 and SSH2 or SSH-2. Used primarily on Linux […]