Emil CHERICHES

Emil CHERICHES

Dedicated Mail Server Hosting Multiple Domains – Step 4 – Further Configurations

September 7, 2014September 7, 2014 Emil C 1 Comment

Firewall CentOS 7 now uses FirewallD, which is not bad, but I don’t think it’s mature enough. So to just disable it and get back to the classic iptables service there are some steps: systemctl stop firewalld systemctl disable firewalld […]

Mail Server Series CentOS, Dovecot, EasyRSA, Firewall, iptables, Postfix, Python

Dedicated Mail Server Hosting Multiple Domains – Step 3 – Postfix and Dovecot

September 6, 2014September 8, 2014 Emil C 8 Comments

On a typical Linux mail server mail is stored on the disk either using one big file in /var/mai/%user either in one Maildir in users’s home folder. This Maildir usually contains one small file for each mail stored on your […]

Mail Server Series CentOS, Dovecot, MariaDB, Postfix, Postfix Admin

Dedicated Mail Server Hosting Multiple Domains – Step 2 – Database and Web Administration Interface Setup

September 5, 2014September 6, 2014 Emil C 2 Comments

This mail server will use Postfix as a MTA, Dovecot as an LDA, IMAP/POP Server, and MariaDB(MySQL) to store user login information. It will also use PostfixAdmin web interface to manage domain, users and mail administrators information. HTTPD To run […]

Mail Server Series Apache, CentOS, MariaDB, Postfix Admin, SELinux

Dedicated Mail Server Hosting Multiple Domains – Step 1 – Distro Install and Prepare

September 5, 2014September 6, 2014 Emil C No Comments

First thing is to chose the Distro. For this install I chose CentOS 7, basically a RHEL clone, version 7 is the latest one. Download You can download the minimal install ISO from here. Then you need to burn this […]

Mail Server Series CentOS, EPEL, SELinux

Hosting a Virtual Machine With a Public IP (proxy_arp)

September 5, 2014September 5, 2014 Emil C No Comments

I run this website on a physical server that i rent. Recently I wanted to run on the same server a virtual machine, with a different OS, with a public IP address(I use KVM for that, as there’s nothing to […]

linux CentOS, KVM, Proxy_ARP

follow the logs

August 29, 2014August 29, 2014 Emil C No Comments

Well, on a high-traffic mail server we need to follow the server log, to look for possible issues. The “tail -f” method might just not be as good as we would want, text is going up too fast and web […]

Tips & Tricks Postfix

Per site custom CSS

August 7, 2014 Emil C No Comments

Let’s say you’re on a news website for instance bbc.co.uk, that you read a lot, but each time you look on the website you can’t tell if you already visited that portion of the website or not. Let’s say you […]

Tips & Tricks Chrome, CSS, Firefox

Removing old kernels

August 6, 2014August 6, 2014 Emil C No Comments

On Debian/Ubuntu we would need to search for installed kernel packages, something like this: root@server:~# dpkg –list |grep linux-image ii  linux-image-3.2.0-23-generic         3.2.0-23.36                                      Linux kernel image for version 3.2.0 on 64 bit x86 SMP ii  linux-image-3.2.0-56-generic         3.2.0-56.86                                      Linux kernel image for […]

linux CentOS, debian, ubuntu

RHEL (CentOS) – changing Apache’s MPMs

July 20, 2014July 20, 2014 Emil C No Comments

Well, in EL6 when we wanted to change Apache’s MPMs we would edit /etc/sysconfig/httpd and set the HTTPD variable with the binary needed.It looks something like: HTTPD=/usr/sbin/httpd.worker To see the available options we could type the following command: [root@server ~]# […]

linux CentOS, MPM, RHEL

Centos7 – reversing to classic iptables

July 16, 2014July 20, 2014 Emil C No Comments

First of all we need to deactivate FirewallD systemctl disable firewalld.service Then we install the package called iptables-services yum install iptables-services edit /etc/sysconfig/iptables then start classic iptables and make it load on each reboot systemctl start iptables.service systemctl enable iptables

linux CentOS

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