Today I present this excellent article by Domenico Raffaele originally presented in his blog (in Italian) where you can find many other interesting articles about hacks and VoIP. I’ve already wrote about unusual use of ssh. I want to return to this topic fascinating and almost unknown, once again, and I promise I will not [...]
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 [...]