Hardening SSH (Secure Shell) on your Debian / Ubuntu server is something that should be done immediately. It is not hard to do and can save you from lots of potential brute force attacks. Change the Default SSH Port Changing the default SSH port is one of the easiest...
There always seems to be some confusion about “broadcasting” rules for licensed HAM radio operators. I tracked down the do’s and do not’s from the FCC website about amateur radio broadcasting, or “One-Way Transmissions”. One-Way Transmissions Q: What types of one-way...
Sometimes you may need to prevent a package from upgrading on your Debian or Ubuntu server. You can accomplish this by creating a file in the /etc/apt/preferences.d/ folder called “no-upgrade”. The name of the file does not matter. nano...
Changing SSH Default Port The default port for SSH is port 22. This can easily be changed by modifying the /etc/ssh/sshd_config file. vi /etc/ssh/sshd_config Change the section that says “Port 22” to your new chosen port number. The new port number does...
You can easily configure fail2ban to monitor failed login attempts for you ISPConfig 3 control panel installation. In this article, I assume you already have a working ISPConfig 3 installation with fail2ban installed. Example: The Perfect Server – Debian 8...
