When you trying to open the external hard disk it says is "not accessible and the file or directory is corrupted and unreadable." And it is showing Zero bytes with you check the drive properties.
Here is the steps to solve the problem, please try:
1) At your Windows > Click on Start button
2) Choose: Run
3) Enter: cmd
4) Example E drive is your portable drive, enter this command: chkdsk E: /r
5) you will see the screen start repairing the disk drive, just wait until 100 percent completed.
Note: To make sure it is safe before you browse the contents, Right click the drive at My Computer & Scan it with your AntiVirus tool.
Thursday, April 7, 2011
Monday, April 4, 2011
How to block UltraSurf with COMODO
Some users use "UltraSurf" to bypass the default proxy & filtering at my workplace network. This program is listening port 9666 thru localhost or 127.0.0.1 as a proxy. It is injecting into the browser on the fly, this equates to create a website on its host called http://Ultra1
For terminals where does not need Internet access, I can straight away take off the Gateway IP from their LAN setting to cut off its connection. But for some authorized users might still need the gateway route to online.
One way of controlling the program, I have found so far, is to place "ultra1" in the Restricted Zone in Internet Options > Security > Restricted Sites. Go to Custom Level and set all items to Disable or High Safety except Popup Blocker.
However I have done some experiments on virtual box and the effective way i found is block the UltraSurf connections at Client's Firewall, sample configuration as below:
At COMODO Internet Security:
>> FIREWALL > Network Security Policy
> Global Rules > Add
1) Action: "Block"
Tick: Log as firewall event if this rules is fired
* Source port > Type: A single port, Port: 9666
* Destination port > Type: A single port, Port: 443
Then, u must lock the COMODO to prevent user to change the setting:
>> MORE > Preferences > Parental Control
> Tick: Enable password protection for the settings
> Set password: your default pwd
> Tick All: Suppress alerts if password protection is enabled
Important NOTE: Make sure the users are NOT given the Windows administrator rights, else they might change the settings anytime and uninstall the Firewall as well.
For terminals where does not need Internet access, I can straight away take off the Gateway IP from their LAN setting to cut off its connection. But for some authorized users might still need the gateway route to online.
One way of controlling the program, I have found so far, is to place "ultra1" in the Restricted Zone in Internet Options > Security > Restricted Sites. Go to Custom Level and set all items to Disable or High Safety except Popup Blocker.
However I have done some experiments on virtual box and the effective way i found is block the UltraSurf connections at Client's Firewall, sample configuration as below:
At COMODO Internet Security:
>> FIREWALL > Network Security Policy
> Global Rules > Add
1) Action: "Block"
Tick: Log as firewall event if this rules is fired
* Source port > Type: A single port, Port: 9666
* Destination port > Type: A single port, Port: 443
Then, u must lock the COMODO to prevent user to change the setting:
>> MORE > Preferences > Parental Control
> Tick: Enable password protection for the settings
> Set password: your default pwd
> Tick All: Suppress alerts if password protection is enabled
Important NOTE: Make sure the users are NOT given the Windows administrator rights, else they might change the settings anytime and uninstall the Firewall as well.
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