RSS

  • YouTube
  • LinkedIn
  • Google

Archives for :

Antispam for Email Servers

I already published a while ago an article showing how I set up a server and email using the most common tools for OpenSource environment on Linux. Used Postfix, Dovecot, Postfixadmin, RoundCube and Spamassassin.

Now I will show another tool that is an alternative to Spamassassin which is the MailCleaner, New Year.



Continue Reading >>

Protecting your WordPress from attacks

This site you are accessing is an installation of the WordPress. I like the ease of it.

WordPress is really good at producing a blog quickly in a VPS or Cloud, but its ease is also its biggest defect.

How simple it is to have a website with it, the vast majority of pages present on the internet are made using it and consequently this attracts those looking for flaws in the programming of its open source.



Continue Reading >>

Docker on Ubuntu. Service nginx failed to build: ADD failed: stat /var/lib/docker/tmp/docker-builder(…)/startup.sh: no such file or directory

Docker in Ubuntu

Sometimes, when using Laradock, this error occurs after trying a container rebuild with no such file or directory message on docker-compose up -d –build nginx command.

Its not clear to me what is the actual issue, but running the command with sudo, we can run it sucessfully.

Seems that the regular user need access rights to directory /var/lib/docker/tmp/ but do not have. So, running with sudo the trouble is bypassed and the build can finished normally.

After build containers with sudo, is possible to unload it and reload without sudo.

Servidor de Email –; Part 4 ; Postfix 3

Part 1 ; Configure main.cf file

This is the third part of the process of creating the mail server on a CentOS 7 and the first part of the Postfix configuration. If you came here by accident, better read one of the publications below first:

Part 1 ; Installation of packages

Part 2 ; Configuring MariaDB

Part 3 ; Dovecot configuration

Postfix is the most important part of our mail server. He will be responsible for talking with other MTAs for you to receive and send e-mail messages and so that it can be reached it is necessary that he be identifiable by the name of the server or your hostname.



Continue Reading >>

Servidor de Email –; Part 3 ; Dovecot

This is the third part of the process of creating the mail server on a CentOS 7. If you came here by accident, You should read first the previous publications

Part 1 ; Installation of packages

Part 2 ; Configuring MariaDB

Dovecot is an MDA (Mail Delivery Agent) means is an agent that transport messages from Postfix to virtual message boxes. In this section we will configure the Dovecot installation to force users to use SSL when they connect, in this way never sending passwords in plain text mode.

I always like to keep the original files of any definition for if I end up getting lost while changing settings. I can say that this step is not needed if you are doing this tutorial entirely, However, If you already have a previous configuration and is just improving it I strongly suggest you make copies of your files.

In our case, the configuration files will be in /etc/dovecot/conf.d/. We can then make copies with the command:



Continue Reading >>

Servidor de Email –; Part 2 ; MariaDB

This is the second part of the process of creating the mail server on a CentOS 7. If you came here by accident, You should read first the previous publication on the Installation of packages

Why use MariaDB/MySQL?

First of all I must clarify that I prefer to use PostgreSQL instead of MariaDB/MySQL for many reasons, However, There is one that weighs against the use of PostgreSQL in a unified server with WordPress and E-mail services is the simple fact that WP does not have native support for PostgreSQL. You can have more information on this topic on the official WordPress documentation This link. How am I basing on personal experience to write this document and also for small services, I'm using the most common and most accessible. If the use of PostgreSQL is of your interest, You can consult this document later where I'll show you how to migrate from MariaDB for PostgreSQL.

Configuring MariaDB/MySQL

Assuming that you are following the steps of this manual, You'll be with an installation of MariaDB still not configured. If you already have a functional installation, You can skip to the next step.



Continue Reading >>

Datatables + HTML 5 Export Buttons + Laravel-Mix (Webpack)

In the last days, I have experienced a problem trying to use Datatables and Bootstrap 4 with support for exporting results to Excel and PDF using Laravel-Mix. After hours and hours trying to put all scripts to work together, I finally win. So, I decide to write this little how to for those with same kind of troubles.



Continue Reading >>

J5 Links

Here are some useful links to Samsung J5 cell Phone.

Google Account verification Bypass