First Install Debian minimal
Configure your Debian repositories
Update the repository sources and add the contrib and non-free repositories.
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 non-free
# wheezy-updates, previously known as 'volatile'
deb http://ftp.us.debian.org/debian/ wheezy-updates main contrib non-free
deb-src http://ftp.us.debian.org/debian/ wheezy-updates main contrib non-free
Continue reading “Install Openmediavault on Debian Wheezy/7” »
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 Cores
- 1x 300GB, 15K RPM Drive
Disable SELinux and IPtables
For this guide SELinux and IPtables were completely disabled and CentOS 6 was up-to-date!
Add DNS FQDN Entry and NTP Sync
To ensure proper resolving FQDN entries in DNS or /etc/hosts must exist and please configure NTP time synchronization for services to run properly. Continue reading “Install Zenoss on CentOS 6 64bit” »
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.
Server Manager -> Configuration -> Windows Firewall with Advanced Security -> Inbound Rules
Do the following:
Enable rule “File and Printer Sharing (Echo Request – ICMPv4-In)”. Continue reading “Add windows client to zenoss monitoring” »
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.
# UDP port rpc.lockd should listen on.
# Port rpc.mountd should listen on.
# Port rquotad should listen on.
# Port rpc.statd should listen on.
# Outgoing port statd should used. The default is port is random
Continue reading “NFS Firewall” »
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 “NFS Server and Client on CentOS” »
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
$ sudo vi /etc/apache2/sites-available/000-default
Finally, restart Apache2.
$ sudo service apache2 restart
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
First of all, you should get the “nmap” package installed in your system.
yum install nmap
apt-get install nmap
sudo apt-get install nmap
sudo nmap -sS [IP address] or [website address]
sudo nmap -O --osscan-guess [IP address] or [website address]
sudo nmap -vv [IP address] or [website address]
sudo nmap -sV [IP address] or [website address]
Continue reading “NMAP Security Scanner on Linux” »
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 to load balance to Backend#1, Backend#2, Backend#3 web servers. Continue reading “PEN: HTTP Load Balancer” »
Adding and Deleting Users
User accounts within the OpenNebula system are managed by oneadmin with the oneuser create and oneuser delete commands. This section will show you how to create the different account types supported in OpenNebula
Administrators can be easily added to the system like this:
$ oneuser create otheradmin password
$ oneuser chgrp otheradmin oneadmin
Continue reading “User management in Nebula” »