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Use FWBuilder to Deploy an IPtables Firewall to a DD-WRT Router
I decided to learn how FWBuilder works and what is better than deploying in a home environment and making sure nothing breaks in the process? At home I have a router that is running DD-WRT and...
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Installing and Configuring Fail2Ban on OmniOS
Fail2Ban is a program that will trigger actions based on patterns found in logs. I am setting up fail2ban to stop ssh brute forcing on my external ssh port. With the configuration below a user that...
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Lowering the Memory Usage on the vCenter Appliance
I set up many virtual labs that include one or more vCenters. In vCenter 5.1+ the default memory allocation has grown to 8GB, which is way more than I want to allocate in a lab. The problem is that...
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Mini ESXi Lab Hosts
Update 04/2013: I wrote this post back in August 2012, but never actually published it. I purchased the mini hosts and have been running them for 8 months with great success. I would still recommend...
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Load Balancing IIS Sites with NLB
Here is quick diagram of what I was trying to achieve: IIS-1 Primary/cluster interface: 192.168.250.47 Secondary Interface: 192.168.250.48 IIS-2 Primary/Cluster Interface: 192.168.250.49 Secondary...
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Snapshots Take a Long Time When “Keep Memory” is Enabled
When taking a snapshot with memory, the VM may be unresponsive and the snapshot may take a long time to complete. This is because the ESX host has to dump the VM’s memory to disk. When looking in the...
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Installing and Configuring OmniOS
Installing OmniOS is pretty straight forward. The installation documentation from OmniOs can be found here. From that document: Boot the disk and follow the directions. Aside from selecting a disk on...
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Setup Your Own Certificate Authority (CA) on Linux and Use it in a Windows...
In this previous post, I deployed a test IIS Server and used a self signed SSL Certificate to encrypt the HTTP traffic. I am sure everyone have seen this page in Internet Explorer: When I clicked “View...
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Configure HAProxy to Load Balance Sites With SSL
Starting with HAproxy version 1.5, SSL is supported. From the main Haproxy site: Update [2012/09/11] : native SSL support was implemented in 1.5-dev12. Prepare System for the HAProxy Install I was...
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Set up simpleSAMLphp as an IdP to be Used in an SP-Initiated SSO with Google...
SP-Initiated SAML SSO Hopefully the title of the post isn’t too confusing. To clear up what I am trying to achieve let’s check out “SP-initiated Single Sign-On POST/Artifact Bindings“. Here is a pretty...
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Enabling LDAPS on Windows 2008 Active Directory Server
I installed Active Directory by selecting the “Active Directory Domain Services” Role from the Server Manager Dialogue. Step by step instructions can be seen in Deploying a Test Windows Environment in...
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Configure AD Replication with Windows 2008
Types of AD replication With Active Directory (AD) there are multiple types of replication. From “What Is Active Directory Replication Topology?“: As such, replication within sites generally occurs at...
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Migrate from Libvirt KVM to Virtualbox
I was recently trying to migrate some VM from our KVM server to my laptop to run in my VirtualBox install locally. As I was going through the process I realized it’s not a very easy process, so I...
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Monitor Disk IO Stats with Zabbix
I wanted to get a feel how much IO my machines are doing each day. As I was going through the zabbix graphs I noticed that IO statistics are not included. I did some research and I came across these...
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Install Splunk and Send Logs to Splunk with Rsyslog over TCP with SSL
Splunk There are a couple of components of Splunk. From Components of a Splunk deployment: Indexer Splunk indexers, or index servers, provide indexing capability for local and remote data and host the...
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RHCSA and RHCE Chapter 9 – System Logging, Monitoring, and Automation
Syslog From Red Hat Enterprise Linux 6 Deployment Guide: Chapter 20. Viewing and Managing Log Files Log files are files that contain messages about the system, including the kernel, services, and...
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RHCSA and RHCE Chapter 10 – The Kernel
Kernel The kernel is a very complex concept, I will try to use some references to put it all together. From Important parts of the kernel: The Linux kernel consists of several important parts: process...
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Mount Various File Systems with Autofs on Mac OS X Mountain Lion
I recently go a new Mac and I wanted to setup autofs on it, just like I did on my previous Linux Laptops. I am running Mac OS X Mountain Lion (10.8): kelatov@kmac:~$sw_vers ProductName: Mac OS X...
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Decrease DMG Size to Fit on a Single Layer DVD
I wanted to create a recovery DVD for my Mac OS X install and all I had was an old DMG of Mac OS X version 10.6. hdiutil Image Information Here is the information regarding the DMG file:...
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Install Fedora 19 on Mac Book Pro
I was using my new Mac and there are just something that I missed from my previous Linux Laptops. So I decided to install Fedora on my new MacBook Pro . The biggest challenge is getting around the EUFI...
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