Tagged: security

An In-Depth Guide to iptables, the Linux Firewall

The Linux kernel comes with a packet filtering framework named netfilter. It allows you to allow, drop and modify traffic leaving in and out of a system. A tool, iptables builds upon this functionality...

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8 Critical Security Issues to Avoid in Your Website

A web application, being exposed to the web, is far more prone to be attacked than other kinds of applications. Building a secure web application is of prime importance — a hacked website costs...

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Protecting SSH with Fail2ban

SSH allows you to log in to a remote computer or server and control it through a command-line interface. However, because SSH is exposed to the internet; attackers can try to log in by...

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Blocking bad bots with Fail2ban

Fail2ban is a versatile security tool. While it is primarily used for preventing brute-force attacks against SSH, it can also be used for protecting other services. There are bots which go around scanning the...