Creating an Ubuntu Router Rumi, May 16, 2013 Step 1 The setup Here is your Ubuntu serve box with two interfaces, eth0————-Internet eth2————-Internal Note: Your Internet is running using eth0. Step1: Install DHCP Server #apt-get install dhcp3-server Continue Reading
Install Openfiler from USB Rumi, April 24, 2013 The problem we have now is our storage server has no optical drive and we do not have any external optical drive available here in office. Alternatively, we can use USB stick drive and make sure our server are able to boot from USB. Server: DELL PowerEdge R510 OS version:… Continue Reading
Install and Configure Zenoss as Centralized Monitoring System Rumi, April 24, 2013 Good system administrator should know that they need to do these 3 most important things after delivering a server: secure monitor backup As part of monitoring task, in this tutorial, I am going to show on how to build a centralized monitoring system using Zenoss. Zenoss will need to use… Continue Reading
LSyncd Rumi, April 24, 2013 I have a situation where there is one critical website under our company server is critically need to be sync to our backup server. Sync means whatever changes happen in master server, it will replicated to slave server. Yes, you can rsync. But, I do not want to schedule the… Continue Reading
High Availability: Configure Piranha for HTTP, HTTPS and MySQL Rumi, April 24, 2013April 24, 2013 In this post we will complete over the Piranha configuration with HTTP and HTTPS load balancing using direct-routing with firewall marks and MySQL load balancing using direct-routing only. HTTP/HTTPS will need to be accessed by users via virtual public IP 130.44.50.120 while MySQL service will be accessed by web servers… Continue Reading
Manage Multiple MySQL Servers using PHPmyAdmin Rumi, April 19, 2013April 19, 2013 In my environment, I have 5 different MySQL database servers running separately under different geographical location. Since it run standalone and not in cluster mode, I need to have one platform to manage these database servers altogether. PHPmyAdmin is able to do this, with some changes on the configuration files…. Continue Reading
CentOS: Configure Piranha as Load Balancer (Direct Routing Method) Rumi, April 19, 2013 I am currently working on a web cluster project using CentOS. In this project, I have 2 web servers running on Apache and mounted the same document root to serve the HTTP content. I also have 2 servers in front of it to become the load balancer and failover to… Continue Reading
Munin adding up new eth interface Rumi, April 17, 2013 root@pluto:/usr/share/munin/plugins# ./if_ suggest ath0 eth0 –shell munin-node-configure –shell creates symlink commands to link useful plugins from the plugin library to the plugin service directory (usually /etc/munin/plugins). To continue the if_ example: root@pluto:/usr/share/munin/plugins# munin-node-configure –shell ln -s /usr/share/munin/plugins/if_ /etc/munin/plugins/if_ath0 ln -s /usr/share/munin/plugins/if_ /etc/munin/plugins/if_eth0 Continue Reading
Centos Install and Configure MRTG Rumi, April 6, 2013 The Multi Router Traffic Grapher (MRTG) is a tool to monitor the traffic load on network-links. MRTG generates HTML pages containing PNG images which provide a LIVE visual representation of this traffic. You need the following packages: mrtg : Multi Router Traffic Grapher net-snmp and net-snmp-utils : SNMP (Simple Network… Continue Reading
Using DKIM to Authenticate Email Message Rumi, March 25, 2013September 11, 2016 Domain Keys Identified Mail (DKIM) defines a domain-level authentication mechanism that lets your organization take responsibility for transmitting an email message in a way that can be verified by a recipient. Your organization can be the originating sending site or an intermediary. Your organization’s reputation is the basis for evaluating… Continue Reading