Author: Rumi

Hasan T. Emdad is an ICT Solution Architect, Project Manager with 12+ year expertise in HW selection, OS expertise on Linux and MS, Supervising Application SW on Pearl, Java, dot Net and PHP with DB experience of MySQL, Postgre, MS and Oracle. He was involved in setting up several Turn Key ICT including Telecom based projects on various government and autonomous bodies in the country. Developed more than 50 applications running with different operators and users. Managing a team of more than 10 in-house engineers and developers and manages an outsourcing team experts and contributors. Very recently engineered Public Key Infrastructure (PKI) on Enterperise and Root Certifying Authority and deployed scalable Cloud Computing and Managed Services. He has post graduated (MBA) from University of Dhaka, Bangladesh.

How to enable Port Forwarding in Iptables

Rumi,

Port forwarding allows remote computers, for example, computers on the Internet, to connect to a specific computer or service within a private local area network (LAN). Typical applications include the following: Running a public HTTP server within a private LAN Permitting Secure Shell access to a host on the private…

Continue Reading

NFS Server and Client on Debian 6/7

Rumi,

Assumptions: NFS Server IP: 172.16.5.100 NFS Client Node1: 172.16.5.101 NFS Client Node2: 172.16.5.102 NFS Client Node3: 172.16.5.103 NFS Client Node4: 172.16.5.104 On the NFS Server: Install nfs-kernel-server Install nfs-kernel-server and nfs-common Install nfs-common on the computer that has the files to be shared. apt-get update && sudo apt-get install nfs-kernel-server nfs-common Edit the exports…

Continue Reading

Install and configure fail2ban

Rumi,

Servers do not exist in isolation, and those servers with only the most basic SSH configuration can be vulnerable to brute force attacks. fail2ban provides a way to automatically protect the server from malicious signs. The program works by scanning through log files and reacting to offending actions such as…

Continue Reading

rkhunter perfect configuration

Rumi,

Introduction Exposing any computer to the internet is in some ways risky. There are many ways that your server can be compromised or attacked by remote systems and malicious software, and it is an ongoing and proactive process to defend yourself against potential threats. One potential concern is rootkits. Rootkits…

Continue Reading

Add EPEL Repo to CentOS or SL 6

Rumi,

For 64 Bit rpm –import http://fedoraproject.org/static/0608B895.txt wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm -ivh epel-release-6-8.noarch.rpm For 32 Bit rpm –import http://fedoraproject.org/static/0608B895.txt wget http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm rpm -ivh epel-release-6-8.noarch.rpm Additional Add Remi Repo rpm –import http://rpms.famillecollet.com/RPM-GPG-KEY-remi rpm -ivh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm yum install yum-priorities Edit /etc/yum.repos.d/epel.repo… vi /etc/yum.repos.d/epel.repo Update: Feb-04-2024 Enable the EPEL Repository on CentOS 6.x, RHEL 6.x,…

Continue Reading

Open Sourced Load Balancer

Rumi,

Linux Virtual Server The Linux Virtual Server Project is a project to cluster many real servers together into a highly available, high-performance virtual server. The LVS load balancer handles connections from clients and passes them on the the real servers (so-called Layer 4 switching) and can virtualize almost any TCP…

Continue Reading

MySQL Master-Master Replication

Rumi,

This article is about setting up MySQL Master-Master database replication between two Cloud Servers. Master-Master data replication allows for replicated data, stored on multiple computers, to be updated by any authorized contributing member of the group. This allows for more open collaboration than Master-Slave replication where any needed changes identified…

Continue Reading