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We welcome everyone to visit and join XenVn.Com! I built this forum because I am passionate about programming. This is where I share what I've gathered and learned from the world. XenVn add-on for...
Linux is free and open-source, this has emanated from the low total cost of ownership of a Linux system, compared to other operating systems. Although Linux operating systems (distributions) are...
Free ModSecurity Rules from Comodo Provides powerful, real-time protection for web applications and websites running on Apache, LiteSpeed and Nginx on Linux. Web applications are the back-end...
Reasons to block Bytedance and Bytespider Bots: They do not respect robots.txt rules. They are using well-known hosting services to bypass normal blocking channels or methods. For example, they...
PHP 8.3 is 2023's major new update to PHP. It brings nice new features such as typed class constants, a new set of Exceptions in DateTime extension, a new json_validate function, and a handful of...
When HTTP/2 is enabled on the webserver, uploads are very slow, topping out at slightly over 1MByte/s, despite both client and server offering vastly more bandwidth. Once HTTP2 was disabled...
Software Package Manager is a command line utility that makes it possible for the user to install, update or configure packages on the system. There are different package managers that are used in...
The /dev/null is a null device that discards any data that is written to it. However, it reports back that the write operation is successful. In UNIX terminology, this null device is also referred...
The storage space of an operating system is much more important than you think. If your system’s storage runs out of space, it becomes unstable and slow, leading to unexpected crashes. Hence...
The ICMP Echo and Echo Reply messages are sent and received by the ping command. In fact, when people say that they sent a ping packet, they really mean that they sent an ICMP Echo Request. These...
Swap is a space on a disk that is used when the amount of physical RAM memory is full. When a Linux system runs out of RAM, inactive pages are moved from the RAM to the swap space. Swap space can...
Linux Change SSH Port (CentOS, AlmaLinux, Rocky, Ubuntu, Debian, etc) Changing the SSH port from the default 22 is a good idea for a few reasons, and it will cut out the majority of bots trying to...
IP whitelist is a security feature that limits and controls access only to trusted users. We can easily whitelist IP addresses using iptables. The complete list of IP ranges that it announces to...
There are different ways of building your own anti-DDoS rules for iptables. We will be discussing the most effective iptables DDoS protection methods in this comprehensive tutorial. This guide...