How to block specific Emails using Postfix

In this tutorial we’ll learn how to block/reject specific emails coming to our mail server using Postfix on Centos7.

Setup Mail Server on CentOS7 With Postfix, Dovecot, MySQL and SquirrelMail

In this tutorial you’ll learn, how to configure a secure virtual user mail server with Postfix, Dovecot, mysql & squirrelmail. We’ll explain how to create new user mailboxes and send or receive email to and from configured domains.

Configure OpenDKIM with Postfix on CentOS 7

OpenDKIM is method to digitally sign & verify emails on the mail servers using public & private keys. It implements the DKIM (DomainKeys Identified Mail) standard for signing and verifying email messages on a per-domain basis. DomainKeys are implemented to reduce the chances of outgoing mails to be marked as SPAM.

How to install Redis and enable on wordpress sites

Redis stands for Remote Dictionary Server.It’s an open-source, in-memory key-value data store.It can also be used as a database, message broker, and of course, cache. As it stores data in RAM, so its accessing speed is quite fast.

How to enable Directory listing in Apache

Directory listing is a web server function that displays the directory contents when there is no index file in a specific website directory.

How to block IPs with Apache

To protect your website from malicious attacks such as DOS & DDOS, you may need to block IP addresses.

How to set Password Authentication with Nginx

There are some sensitive pages or sections of the site that you wish to restrict access to, when setting up the webserver.

How to configure NGINX server to block access using server IP

In this tutorial, I will try to explain how we can block access to the server when someone tries to access the server from the IP address in browser.

How to setup SFTP-only user account on centos7

SFTP (SSH File Transfer Protocol, also known as Secure FTP) is a popular method for securely transferring files over remote systems. It was designed as an extension of the Secure Shell protocol (SSH) version 2.0 to enhance secure file transfer capabilities. It supports file access, file transfer, and file management functionalities without command or data channels. 

How to block IPs with NGINX

Sometimes you may need to block IP addresses to protect your website from malicious attacks such as DOS & DDOS.