What are the differences in closed, open, and filtered ports on a firewall? | Using nmap or other tools, you may have seen results that say open, closed, or filtered. Here is some insight into what this all means!
Mitigate DoS Attacks in Linux with a blackhole route | If you are under a DoS attack, it is best to route the offending IP to a blackhole or null route rather than rejecting or other actions on the traffic. Here’s how it works in Linux!
Wordfence: Security Plugin for WordPress | Here is a review of Wordfence, a WordPress security : Wordfence: Security Plugin for WordPress If you find this topic interesting, you may also be interested in Expert Pen Testing or CISSP training. Cool!
How to Manually Edit ufw Rules on Ubuntu Linux | ufw is the great command line app for managing iptables in Ubuntu. While any changes should use the ufw command, it is possible to rather manually edit user created ufw rules in cases where that might be desirable. The file location is: /lib/ufw/user.rules For ipv6 rules, the file is: /lib/ufw/user6.rules As with iptables, rules are
nmap UDP Port Scan Example | By default nmap performs a TCP scan only. I’ll show you how to scan for UDP ports with nmap! The syntax is $ sudo nmap -sU -p port target Example: $ sudo nmap -sU -p 3478 192.168.1.25 Starting Nmap 6.00 ( http://nmap.org ) at 2012-06-13 20:43 EDT Nmap scan report for example.com (192.168.1.25) Host is