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Category: Configurations (Linux)

2 Gateways or Multiple Gateway on a single CentOS box

Rumi, May 21, 2015

Scenerio- eth0- 172.30.0.100 | Gateway- 172.30.0.97 eth1- 192.168.2.247 | Gateway- 192.168.2.1 Need to connect to SIP BOX destination (fictitious)- 202.140.1.1 eth0 has not internet access but it uses the mentioned (172.30.0.97) as gateway to reach 202.140.1.1 server eth0 has internet access by using 192.168.2.1 gateway. Here goes the configuration on /etc/sysconfig/network-scripts/ifcfg-eth0

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Cacti on Debian (Updated)

Rumi, April 19, 2015April 19, 2015

Downloading Cacti You can download the newest version of Cacti from its website. wget http://www.cacti.net/downloads/cacti-0.8.7b.tar.gz Installing Cacti Install apache webserver with php support, mysql database server, snmp, some php modules and rrdtool. apt-get install apache2 libapache2-mod-php5 php5 php5-cli php5-mysql php5-gd php5-snmp mysql-client mysql-server libmysqlclient15-dev snmp snmpd rrdtool Add a user…

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Enable 1:1 NAT in Iptables

Rumi, April 17, 2015

1:1 NAT maps a single Public IP Address to one of your computer within your local area network (LAN). Unlike port forwarding, 1:1 NAT forwards all ports from one external IP to one internal IP. iptables -t nat -A POSTROUTING -o eth0 -s 192.168.1.2 -j SNAT –to-source 83.229.64.2 iptables -t…

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How to enable Port Forwarding in Iptables

Rumi, April 17, 2015

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…

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NFS Server and Client on Debian 6/7

Rumi, March 13, 2015

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…

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Install and configure fail2ban

Rumi, January 4, 2015

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…

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rkhunter perfect configuration

Rumi, January 4, 2015January 4, 2015

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…

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Reset Zpanel Zadmin Password

Rumi, December 25, 2014April 25, 2017

It’s a silly though, after updated from webGUI zpanel’s dashboard, the updated password wasn’t just working!!! So had to google a while and found the answer- keeping it for future reference- setzadmin -set password Note: In “password” area type “your new password” That’s it!

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Add EPEL Repo to CentOS or SL 6

Rumi, November 24, 2014February 4, 2024

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,…

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Install Perfect Mail Server with ISPConfig and Horde 5.0 on Debian Wheezy- Part-2

Rumi, October 13, 2014October 13, 2014

Install necessary packages apt-get install php5-sasl php5-intl libssh2-php php5-curl php-http php5-xmlrpc php5-geoip php5-ldap php5-memcache php5-memcached php5-tidy Register the Horde Pear channel pear channel-discover pear.horde.org Set the Horde installation directory pear install horde/horde_role pear run-scripts horde/horde_role You'll be asked the following question: Filesystem installation for base Horde application: /var/www/horde You can…

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Myself…

Hi, I am Hasan T. Emdad Rumi, an IT Project Manager & Consultant, Virtualization & Cloud Savvyfrom Dhaka, Bangladesh. I have prior experience in managing numerous local and international projects in the area of Telco VAS & NMC, National Data Center & PKI Naitonal Root and CA Infrastructure. Also engaged with several Offshore Software Development Team.

Worked with Orascom Telecom-Banglalink, Network Elites as VAS partner, BTRC, BTT (Turkey) , Mango Teleservices Limited and Access to Informaiton (A2I-UNDP)

Currently working at Oracle Corporation as Principal Technology Solution and Cloud Architect.

You can reach me [h.t.emdad at gmail.com] and I will be delighted to exchange my views.

Tags

Apache Bind Cacti CentOS CentOS 6 CentOS 7 Debain Debian Debian 10 Debian 11 Debian 12 DKIM Docker endian icinga iptables Jitsi LAMP Letsencrypt Linux Munin MySQL Nagios Nextcloud NFS nginx pfsense php Postfix powerdns Proxmox RDP SSH SSL Ubuntu Ubuntu 16 Ubuntu 18 Ubuntu 20 Varnish virtualbox vpn Webmin Windows 10 XCP-NG zimbra

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