security Archives - Linux Security 101

Tips and Tricks: Blocking HTTP requests via Iptables for a specific domain

Posted on December 1, 2018 by linuxsecurity-admin

In a previous article, we showed how to block specific domains at the DNS level using iptables. Today, we will expand into that and show how to also block HTTP requests for a specific domain (or URL) in there. Iptables String Matching Iptables string matching is very powerful and easier to use than the hex-string…

Linux Security Checklist

Posted on November 17, 2018November 17, 2018 by linuxsecurity-admin

Before you deploy any Linux server online, we recommend that you go through this checklist to prevent a breach and/or a compromise. Organizational Single purpose server. Is this server single purpose? Do not run a mail server with a web server (different purposes), for example. Or a web server with a DNS server. Do…