Linux Systems Being Hit By SSH-Key Attacks (ESX)

Posted on August 28th, 2008 in Announcement, Industry News, Virtualization | No Comments »

Latest news that Linux had been potentially attack by some of the method it use to steal the SSH key to gain root access to the potential system.

According to US-CERT, the attack appears to rely on stolen SSH keys to gain access to a system. It then uses a local kernel exploit to gain root access, whereupon it installs the “phalanx2” rootkit, derived from the older “phalanx” rootkit.

Since the ESX server is running on Linux kernel, I will strongly recommend we should keep an eye on the ESX host to ensure this is not impacted. That could become a serious impact to the virtualization.
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Experience on VMware ESX 3.5 and ESX 3.5i

Posted on August 26th, 2008 in Virtualization | 1 Comment »

I had tested both environment with my test machine which is DELL Precesion Workstation with 2 x 2.0 Quad core, which had total of 17GB ECC memory loaded with 3 SATA disk contain more than 1TB local storage. Below is the comparison I had done during the test.

Installation – ESX 3.5i had advantages as the entire process is fast and simple. ESX 3.5 require more interaction as it looks similiar to Linux installation. I know the ESX 3.5 can be script and customize by using the ks.cfg which I had done previously for mass deployment. For comparison 1 to 1, ESX 3.5i is much more easier and faster.

Configuration – Basically I dun really find much different as I do manage this machine with my virtual center. The only different is the Linux connection and command no longer usable on ESX 3.5i. By the way, I read some artical to tweak around to make the SSH work on the 3.5i, but I will prefer to proceed with powershell or CLI if I do need to use command prompt.

Perfomance – ESX 3.5i had better through put. In my test, I created 3 VM which 2 of them running on Windows 2003 SP2 with 4GB memory and 4Vcpu, plus additional 1 VM with SUSE Linux. I did the same on ESX 3.5 too. The respond on the ESX 3.5i is much smooth and not lacking, as ESX 3.5 you will see some lacking from the console open on Virtual center.  Follow by file copy test, the VM on ESX 3.5i is slightly faster than ESX 3.5. just less than a minute faster which I tried to copy some file with 20GB. Beside these points, I had not found anything different.
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Antivirus for VMware ESX host

Posted on August 24th, 2008 in Operating Systems | 1 Comment »

Someone posted a question about Antivirus for VMware ESX host in VMware forum recently which make me recall what I plan todo before.

Few month back, I was thinking of install Antivirus (probably ClamAV) for my VMware ESX box but I give out at the end of the day. Why? I think this is too much(for the time being). So far, I used to monitor or administrative more than 200 of SuSE and Red Hat Linux box and I have never install any anti virus software for Linux’s box. So why I need one for VMware ESX. Basically VMware ESX 3.x and Redhat Linux is almost the same.

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Virtualization – Network, Storage, Data Center

Posted on August 23rd, 2008 in Data Center, Virtualization | No Comments »

Virtualization become a MUST for every single environment which run a small, medium or huge Data Center today. Even we can see the grow at the level of small medium business as well as some manufacturing plant too. VMware as the technology and market leader, it had provide a lot of new flexibility in term of reducing carbon foot print, green IT initiative, as well as CAPEX saving and etc. It had been huge saving from every single different perspective. Somehow, it had created complexity in term of Data center, Power & Cooling, Storage, and of course the complexity and extra workload on the engineers who support the environment.

Many of the case study happen today, we do see that users or the implementers had not for see some important hidden potential issue during the earlier stages of deployment. The fast grow of the storage, the higher bandwidth required, specify cooling and power needed to be supplied for the Virtual Infrastructure zone in the data center as well as the operation support task needed to be carried on as daily basis.

A success architect for Virtualization had to been specialize is all those area I had stated above to ensure the entire deployment will able to achieve all the goals had been set during the project planning. Some how, we do need to urge the employers to send the system engineers for further training in multiple products, example like VMware training, Linux administration, Microsoft Training as well as Network Training plus Data center training too. That is all the necessary requirement for the engineer to able to support, manage and plan for future extension of the virtualization farm.
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