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Rethink I.T.

Google Public DNS Versus OpenDNS

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Trying to improve your DNS lookups? Give these two a try. Google Public DNS: OpenDNS: Download and run ns_bench to compare between these 2 options. Then run this from the command prompt and choose your DNS servers: ns_bench

Download the Rescue Disk from here: File will be downloaded as an ISO image. You can use ImgBurn to burn the image file to CD. Download ImgBurn from here: Use the Download Latest Version link to get the most recent copy of ImgBurn. Once the BitDefender Rescue Disk has been downloaded and burned to CD, boot up the computer to be scanned from the CD. Hit Enter at the first prompt. The Rescue Disk will run update the virus definitions and scan the hard drive automatically.

Restrict Access To Unwanted Internet Sites Using OpenDNS

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Visit the OpenDNS web site and select the model of router you are using: From there you are guided through the process of adjusting your routers name servers, followed by creating an account with OpenDNS. This account is necessary for you to log into and make the necessary category restrictions. Once you are logged in, go to the Settings tab. From there you can select which categories you want blocked. This is great for protecting your kids from all the garbage on the Internet.

Sysinternals Suite Of Tools

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Quick access to the Sysinternals suite of tools can be found here:

For Linksys devices, go to: From there you can select the Linksys device (wired router or wireless router) you are trying to troubleshoot. You may have to choose from the Firmware Version currently installed on the device. Now you have access to all the tabs / options in the router and can better assist the user over the phone or by email. For D-Link devices, go to:

Resize A Windows Partition with GParted

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Download GParted and burn from ISO to create bootable CD. Boot from the GParted CD. Select the Default Settings for the first four choices. (just hit enter) Once GParted has finished loading, select the disk and partition you want to increase (resize). Choose Partition from the menu and select Resize/Move from the options. Just drag the slider bar to the size that you want, click on the Resize/Move button, then click on the Apply button. This will resize your partition. Once done, restart the computer. Windows will do a disk check and reboot if you are shrinking the partition size. If you are increasing the partition size, then it will reboot into Windows.

Step 2: Restoring The Image Follow the same steps as done in creating an image. (except for running sysprep) When selecting mode, you will choose restoredisk instead of savedisk option. This should pull up all the images stored on your File Server. Select the one you want to restore. Select <Ok> to confirm that you want your disk overwritten with the image. Select <y> to the warning that you will be overwriting your disk. Clonezilla will warn you twice.

Open A Command Prompt On A Remote Computer

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Download PsExec. Go to a command prompt and navigate to the directory that contains the PsExec executable. From there execute the command in this format: psexec \Remote_Computer_Name_or_IP_Address cmd Of course you will need to have Administrative access to the remote computer and the remote computer will hae to have the Windows Firewall turned off or necessary ports open.

Download ICSweep. Go to a command prompt, change directory to where ICSweep.exe is located. Run ICSweep /ALL to delete both temporary Internet files and Temp files. This command will work for all user profiles that are not in use when the program is run. I run this command after the Terminal Server or Citrix Server is rebooted to ensure all user profiles get cleared out.

Improve DNS Query Response Times - Use OpenDNS Nameservers

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To help improve the efficiency of your network, switch your nameservers to that of OpenDNS. To test if this will improve the performance of your DNS queries, download ns_bench and run a test against your current DNS nameservers and that of the OpenDNS nameservers. Current OpenDNS nameservers are and Go to a command prompt and change directory into the ns_bench folder. From there run ns_bench using this format: ns_bench This will give you some performance statistics of the OpenDNS servers. Try running this again, but adding your current DNS nameservers after the 2 OpenDNS nameservers to see how they perform against each other.