Display Available Network Ethernet Interfaces Rumi, October 10, 2015 List Network Interfaces Using ip Command Type the following command, enter: $ ip link show Sample outputs: Continue Reading
Install Openmediavault on Debian Wheezy/7 Rumi, October 3, 2015April 27, 2018 First Install Debian minimal Configure your Debian repositories Update the repository sources and add the contrib and non-free repositories. nano /etc/apt/sources.list It should look something like this: deb http://ftp.us.debian.org/debian/ wheezy main contrib non-free deb-src http://ftp.us.debian.org/debian/ wheezy main contrib non-free deb http://security.debian.org/ wheezy/updates main contrib non-free deb-src http://security.debian.org/ wheezy/updates main contrib… Continue Reading
Install Zenoss on CentOS 6 64bit Rumi, September 27, 2015September 27, 2015 Minimal Hardware Requirements: Small Deployments (1 to 250 Monitored Devices) 4GB RAM 2 CPU Cores 1x 300GB, 10K RPM Drive Medium Deployments (250 to 500 Monitored Devices) 8GB RAM 4 CPU Cores 1x 300GB, 10K RPM Drive Large Deployments (500 to 1000 Monitored Devices) 16GB – 32GB RAM 8 CPU… Continue Reading
Add windows client to zenoss monitoring Rumi, September 27, 2015 Allow ICMP Through Firewall Firstly you need to allow incoming ICMP ping request since this is the way Zenoss checks if the system is online. Go to: Server Manager -> Configuration -> Windows Firewall with Advanced Security -> Inbound Rules Do the following: Enable rule “File and Printer Sharing (Echo… Continue Reading
NFS Firewall Rumi, September 9, 2015 Dynamic ports cannot be protected by port filtering firewalls such as iptables. First, you need to configure NFS services to use fixed ports. Open /etc/sysconfig/nfs, enter: # vi /etc/sysconfig/nfs Modify config directive as follows to set TCP/UDP unused ports: # TCP port rpc.lockd should listen on. LOCKD_TCPPORT=lockd-port-number # UDP port… Continue Reading
NFS Server and Client on CentOS Rumi, September 9, 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 & All Client machine as well: yum install nfs-utils nfs-utils-lib Edit the exports file that shows what to share and with whom. So run: Continue Reading
Enable mod_rewrite on Apache for Debian Rumi, September 8, 2015 To enable and load mod_rewrite, do the following. $ sudo a2enmod rewrite Then open up the following file, and replace every occurrence of “AllowOverride None” with “AllowOverride all”. $ sudo vi /etc/apache2/sites-available/default or $ sudo vi /etc/apache2/sites-available/000-default Finally, restart Apache2. $ sudo service apache2 restart Continue Reading
Convert .p12 bundle to server certificate and key files Rumi, August 28, 2015February 16, 2024 Seperate Private Key and Certificate file #Generate certificates bundle file openssl pkcs12 -nokeys -in server-cert-key-bundle.p12 -out server-ca-cert-bundle.pem #Generate server key file. openssl pkcs12 -nocerts -nodes -in server-cert-key-bundle.p12 -out server.key Convert a PKCS#12 file (.pfx .p12) containing a private key and certificates to PEM openssl pkcs12 -in keyStore.pfx -out keyStore.pem -nodes… Continue Reading
NMAP Security Scanner on Linux Rumi, August 21, 2015February 11, 2017 First of all, you should get the “nmap” package installed in your system. On CentOS yum install nmap On Debian apt-get install nmap On Ubuntu sudo apt-get install nmap NMAP Commands: sudo nmap -sS [IP address] or [website address] sudo nmap -O –osscan-guess [IP address] or [website address] sudo nmap… Continue Reading
PEN: HTTP Load Balancer Rumi, August 15, 2015August 15, 2015 This is performed on a CentOS 6.x 64 bit machine Install pen which is lightweight simple Load Balancing software. It is TCP protocol based, so it’s possible to balance not only HTTP but SMTP, FTP, LDAP and so on. This example is based on the environment like follows. Configure Pen… Continue Reading