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Enable SSH and remove Telnet on a 3COM 4200G Switch Script

Enable SSH and remove Telnet on a 3COM 4200G Switch Script

As any security nut knows, telnet is bad, I mean really bad. Why would you want to send unencrpyted clear text passwords over your network? This is now my 2nd post of how to enable SSH on switches. You might remember an older post when I showed how to enable SSH on Nortel 5520 switches. I haven't blogged on how to enable SSH on Cisco because it's pretty easy and googleable (<~ new word?). 3COM isn't near as difficult as Nortel, but here is a script on how to enable SSH on 3COM 4200G series switches while at the same time disabling telnet. The only good thing I have to say about 3COM switches is that you don't have to load a new IOS or Image that supports SSH, it's all inclusive.

Read more: Enable SSH and remove Telnet on a 3COM 4200G Switch Script

A Simple Way To Crack Passwords Across Your Domain for Compliance

A Simple Way To Crack Passwords Across Your Domain for Compliance

Every quarter or more, you may have to figure out if everyone in your enterprise is being compliant with passwords. Sometimes Active Directory's password policy doesn't take into account some things you feel are more secure, such as not being able to use any words from the dictionary in your password. Password security is always a thing to worry about in any organization

So here is a simple guide to cracking passwords across the domain with pwdump3 and ophcrack.

In my example I am using a virtual Win7 machine with no anti-virus installed and running the dumps against the Active Directory server

Read more: A Simple Way To Crack Passwords Across Your Domain for Compliance

vSphere'in on a budget

vSphere'in on a budget - A Makeshift vSphere Lab

the title is supposed to be like the saying "ballin' on a budget", so forgive me on my bad sense of humor.

I now work at a very small shop and resources are hard to come by for testing. I wanted to test vSphere, but I don't have multiple servers for testing. After reading many blogs of how others were able to virtualize ESX4 within itself, it creates the perfect scenario for testing.

In this lab I have only 1 HP GL D380. It has Dual Quad Core E5404, 16GB of RAM, 2 physical NICS, and 500GB of space. This server is considered the DR server. We use it to keep virtuaized images of physical servers of-site until a full blown VMware environment can be put in place. Currently, ESXi 4 free version is installed on top of the bare metal, and here is how I installed the vSphere environment on top of ESXi 4 free.

Read more: vSphere'in on a budget

Veeam me to VMworld 2009!

Veeam me to VMworld 2009!

Veeam is supporting a video contest that has a grand prize of airfare, hotel, and ticket accomodations to VMworld 2009 in San Francisco, CA. I need YOUR help! The contest relies solely on voting by people like you. All you have to do is register for the Veeam forums (I know, I hate registering for stuff also, but I really appreciate it). You can't use a @gmail or @hotmail address to register for spam purposes, you will need to use your work/university email address. Go to the thread Veeam Video Contest and vote for #4 Kendrick Coleman.

What's in it for you? If I win and you voted for me, I'll buy you a Flinstone's Push-Up...act like you don't love some orange sherbert. In addition, after you register, try and think of something uber funny because if you have the best comment in the Veeam Video Contest thread, you win a Flip Video Camera! These things are pretty sweet! So go vote for me and comment in the thread and we both can win! Thanks!

**EDIT** UPDATE: if you are not registering because you feel like you might get Veeam spam, rest assured that this registration is for forum voting ONLY. you will not receive any sort of offers or anything from Veeam. Straight from Veeam themselves: Official confirmation: Veeam does not collect email addresses from forum registrations. Merely spam/bot-vote protection.

Read more: Veeam me to VMworld 2009!

How to extend the OS partition of a Virtual Machine Drive (VMDK) if it contains 2 or more partitions

How to extend the OS partition of a Virtual Machine Drive (VMDK) if it contains 2 or more partitions

Before we begin, this is all done with VMWare ESX 3.5 and you need to have an ISO of GParted.

Last night I was given the task to extend the Operating System (C:) drives of a few virtual machines because we ran out of room for Windows patching. This is a relatively easy task. Shutdown the VM, extend the disc a few GB under edit settings of the VI Client, boot into GParted, resize, apply, and reboot. Bam, you're done. Well, let me throw this scenario at you. Someone before you did a P2V (Physical to Virtual) of a server that had 2 physical hard drives and during the process didn't hit that little checkmark to create 2 seperate virtual hard drives (VMDKs). Instead, you are left with one large hard drive with 2 partitions. Windows still functions as it did when it was physical, having 2 seperate hard drives, for this instance we will say C: & E:. Since the Operating System partition is at the beginning of the drive, you can't move it to the end and extend it because that would screw up the MBR (Master boot record).

Read more: How to extend the OS partition of a Virtual Machine Drive (VMDK) if it contains 2 or more partitions

Mounting EMC's Checkpoints / SnapSure as a file-level recovery solution for VMware ESX Virtual Machines when using NFS Datastores

Mounting EMC's Checkpoints / SnapSure as a file-level recovery solution for VMware ESX Virtual Machines when using NFS Datastores

 **Edit** 10/21/2009 - This is not solely for VMs running on NFS Datastores. This can be VMs running on iSCSI too. You just have to export the snapshot as a NFS volume to mount it inside a linux box

**EDIT** 1/15/2010 - Collin MacMillan over at http://blog.solori.net- brought up a very good point. How can you export an ISCSI VMFS to a NFS datastore? The Answer is: I DON'T KNOW =(. I no longer have my celerra, so if anyone can test and let me know, I will be sure to update the post. So if you're running iSCSI, this is YMMV. Thanks Collin!

I'm really getting bad at these long titles. On to the good stuff

A little background on what I am running to see if it will suit your environment's needs. I currently have 7 ESX Servers running version 3.5 and an EMC NS40 Celerra Version running version 5.3.36. My environment runs solely on NFS and so far this is the best option I've seen. You will need a linux box, in this case I created a virtual machine of Kubuntu Desktop Intrepid Ibex 8.10. That being said let's continue.

Basically, this is how it works. Using the Celerra Manager we will create a schedule of checkpoints for a file system. This is done on the back end of the file system, so unlike many backup solutions, this won't put any stress on the ESX hosts. Using some Linux mount commands, we can mount the snapshots/checkpoints and mount a virtual machine's hard drive. This solution is free, won't be needing any additional servers or bigger storage, can be managed internally, and won't be dependent on 3rd parties.

Read more: Mounting EMC's Checkpoints / SnapSure as a file-level recovery solution for VMware ESX Virtual...

How to fix a frozen Virtual Machine that is stuck at 95% or timed out after trying to power off or restart

How to fix a frozen Virtual Machine that is stuck at 95% or timed out after trying to power off or restart

that's quite the catchy title eh? Well I couldn't think of any other way to put it.

I have had this problem 3 times now so hopefully I'll blog about this to potentialy save other people some more time

Symptoms: Your virtual machine has frozen. You open up the console and you get no mouse movement, it's literally frozen. It will not respond to ping requests, RDP, anything.

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UPDATE*** 10/15/2009** THIS METHOD WORKS FOR ESX3.5. HAVE NOT TESTED ON VSPHERE. THIS WILL NOT WORK ON ESXi 4

"@LeGrandMeaulnes @KendrickColeman So you may want to make a note ... those steps don't work in ESXi 4. No vmware-cmd, nothing useful in /proc."

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Read more: How to fix a frozen Virtual Machine that is stuck at 95% or timed out after trying to power off or...

The Proper Way To Mount NFS Filesystems with EMC Celerra

The Proper Way To Mount NFS Filesystems with EMC Celerra

We are moving our production VMs from iSCSI to NFS data stores in our ESX environment because of replication issues. We found out that to replicate a 1TB Lun with iSCSI, you need to have 4.4x the amount of space. You have to have your 1TB Lun sitting inside a 2.2TB Filesystem (because to replicate an iSCSI Lun it uses 120% overhead), then you also need 2.2TB sitting on the receiving end. We found that to be ridiculous because of how much it costs for a single drive. We are moving towards NFS because to replicate an NFS Filesystem is uses very little overhead. Thus, we are regaining TONS of space. After creating a few NFS Filesystems and running production VMs on them, I think I found the proper way to create the NFS shares.

Read more: The Proper Way To Mount NFS Filesystems with EMC Celerra

Configuring Local SSH account on a Nortel 5520 ERS

After relentless searching on the tubes, I found no step-by-step guides on how to setup SSH on nortel switches, Nortel Ethernet Routing Switch 5520 to be exact.  After contacting Nortel personally I have finaly found the solution and it wasn't difficult to say the least

Read more: Configuring Local SSH account on a Nortel 5520 ERS

vmware-vmz-zdump

I've encountered a new problem and only found a little bit of help online

 

I am going through the process of moving our storage. When you do a storage VMotion you cannot migrate storage if there are snapshots.  I had one machine that had snapshots so I had to delete them. During the deletion process, the VirtualCenter Server froze up and killed the deletion process. After I logged back into Virtual Center, I noticed these 2 files sitting in the directory

 vmware-vmx-zdump.001

 vmware-vmx-zdump.000

 

Read more: vmware-vmz-zdump

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