Two fundamental components of any computer programming language are variables and constants. Like independent variables in a mathematical equation, these take on values that change the results of the program. Variables and constants both represent unique memory locations containing data the program uses in its calculations. The difference between the two is that variable values … Read more
IPSET is an extension to iptables that allows you to create firewall rules that match entire “sets” of addresses at once. Unlike normal iptables chains, which are stored and traversed linearly, IP sets are stored in indexed data structures, like addresses, networks, (TCP/UDP) port numbers, MAC addresses, interface names or combinations of them in a … Read more
PHP ( PHP Hypertext Processor ) commonly used programming language for creating websites. Over 78% of all the websites are using PHP, ie. 8 out of 10 websites are PHP websites. WordPress, Joomla, Drupal, and many other CMSs are using PHP as the programming language. The latest PHP version 7.4.9 was released on “06 Aug … Read more
In this guide you will learn how to tweak the default postfix configuration for incoming emails. In Postfix configuration you need to add or edit following directives on /etc/postfix/main.cf configuration file. All configuration directives are explained in the postfix website. Postfix Configuration Parameters smtpd_helo_required = yes Require that a remote SMTP client introduces itself with … Read more
You can use 3rd party compiled malware and virus signature databases to extend ClamAV signature database collection with better detection PHP malware. RFXN (R-FX NETWORKS) Database signatures are updated typically once per day or more frequently depending on incoming threat data from the LMD checkout feature, IPS malware extraction, and other sources. Malware.Expert also generates … Read more
ClamAV is an open-source anti-virus engine designed to detect viruses, Trojans, malware and other threats. It supports multiple file formats (documents, executables or archives), uses multi-threaded scanner features and receives updates 3-4 times a day for its signature database. Additionally, we are updating our database, so the user will get improved results. Benefits of using … Read more
This tutorial we show how you can use the RBLs interface to configure your mail server to check incoming mail against the available RBLs. Your server will block the incoming messages if the IP address or hostname matches an cPanel RBL entry. RBL is short for “Real-time Blackhole List.” RBL servers keep lists of spam-heavy … Read more
Servers running iptables with CSF firewall can become slow and bogged down while processing the sometimes hundreds of IP addresses in CSF’s iptables chains. Thankfully, it is possible to quickly and easily alleviate this slowdown by installing and configuring a took called ipset. IP sets are a framework inside the Linux kernel that can store … Read more
OpsShield has released cPGuard version 3 for DirectAdmin servers with all features available for cPanel plugin with some extra features added. With the latest version the release tier which is version 3.16 is coming up with CentOS/RHEL/CloudLinux 8 support. Some of the exciting features in new cPGuard version for DirectAdmin includes the following Revamped UI … Read more
Have you ever tried to visit a website only to get an “Access Denied” or “Unauthorized” sign displayed on your computer or laptop screen? When you type a website into the address bar, an HTTP request is sent to the web servers as a status code. The HyperText Transfer Protocol (HTTP) then follows a set … Read more