I recently purchased a 24-port Gigabit Layer 2 Switch that supports VLAN tagging and trunking. Dell PowerConnect 5324, see here, has 24 Ethernet ports and is capable of tagging and untagging Frames at wire speed....
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Linux — OpenVPN Creating a Client VPN Setup
Before we begin I want to clearly identify the scope of this tutorial. There are different types of VPN, we will be creating a Client VPN which implies a many to one relationship. We will...
Continue reading...Linux — iSCSI Target using open-iscsi
I recently set up an iSCSI SAN for use with VMWare Server. The set up was basically a Linux Ubuntu Server target with 2 network links to a single VNWare Server as the integrator. I...
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F5 BIGIP — Determine the Healthcheck Source Address
I was discussing some F5 LTM Healthcheck Monitor capabilities with a colleague of mine at work the other day, when he brought up a great question. What does an F5 LTM use for a source...
Continue reading...Linux — Squid Proxy, EasyList to SquidGuard Expression List
Hi all! It’s seems to be difficult to keep up with the EasyList expression lists, and to make matters more confusing, the conversion from one EasyList expression list to SquidGuard can be cumbersome. There are...
Continue reading...Linux — Apache Logs -Stop Logging Certain URIs
I recently posted an article talking about HAProxy as a load balancer. In the article I spoke about using a HTML health check file to maintain status of each servers Apache instance. The problem is...
Continue reading...Linux — HAProxy HTTP Load Balancing HAProxy1.4
I’ve posted a few articles on load balancing with the use of BIGIP F5 hardware appliances. However, there are also a few alternatives available, some even free! HAProxy is a popular load balancing application that...
Continue reading...Linux — nTop and darkstat Traffic Monitoring
Hey All, so I posted an article on setting up your own Linux based firewall using iptables, and thought it would be nice to be able to monitor the connections coming in and out of...
Continue reading...Linux — Recovering from Drive Failure with mdadm
So it happened. I had a drive fail on me. Degrading my RAID 6 media server. Luckily I was notified by mdadm and was able to order a new one from newegg.com and rebuild it....
Continue reading...Linux — IPTABLES NAT, Dynamic NAT, NAT Overloading/Masquerade
If you have had experience with NATs via Cisco Routers or read about them in your CCNA studies, there are 3 Network Address Translation(NAT) types. Technically, two, see here, plus a third special case. Static...
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