Protect Against Brute Force with ufw | ufw is the super easy firewall interface featured in Ubuntu and also the latest Debian. Somewhat like fail2ban, one feature of ufw is built-in rate limiting to protect against brute force attacks. While this could be used on any port, a common use is on port 22 to protect against ssh dictionary attacks or other
Prevent Postfix Brute Force
Prevent Postfix Brute Force | An often used attack vector is brute forcing MTA logins. While most admins watch ssh auth logs like a hawk, email auth/login logs are most often not closely watched for this sort of thing if at all. I’ll show you one way to easily prevent a Postfix brute force attack! This how-to focuses on fail2ban
Hardending Red Hat Linux, OS X, and Windows
Hardending Red Hat Linux, OS X, and Windows | The security folks at the NSA have online guides on how to secure Linux, OS X, and Windows operating systems. These are definitely worth a read of all articles even if an OS in question is not your main cup of tea. Here is the link: http://www.nsa.gov/ia/guidance/security_configuration_guides/operating_systems.shtml Page has been taken down This direct link
Quick Hping How-To
Quick Hping How-To | hping is an excellent networking tool that can be used to send a crafted packet over a specific port to test firewall settings. In this example, I’ll show you how to do quick firewall port testing using hping3. First, install hping! Ubuntu has the latest hping3: sudo apt-get install hping3 Ok, now let’s send a
Roku Open Ports
Roku Open Ports | Being the hackery-type that I am, I have been poking at my newly purchased Roku HD. It turns out there are four ports open on the Roku. 8080, 8085, 8086, and 8087. After different attempts, the only fun I could come to is that you can telnet to your Roku on port 8080. The other
ClearOS Enterprise 5.2 Review
ClearOS Enterprise 5.2 Review | This is a quick first impression review of ClearOS! (No, not centos, clearos!) I see why this may be even confusing as ClearOS is based on CentOS. So, what is it? ClearOS is a magnificent gateway or standalone server appliance based on CentOS 5.5. In a nut shell you install, input some general settings in
