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Thursday, December 11, 2014

How do you nslookup a Computer inside a Windows Domain from outside a Windows Domain?

If you perform nslookup from a Computer that is not configured to use the existing Windows Domain DNS and/or the Computer is not joined to the Windows Domain, you will have to use the Fully Qualified Domain Name (FQDN) ala host.domain.suffix to nslookup a Computer inside the domain.  Example: computer01.mydomain.com.  First, please set the nslookup server to the Windows Domain DNS and then enter the FQDN of the computer you wish to lookup.

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How do you perform nslookup from a specific DNS Server?

To perform nslookup from a specific DNS Server, please perform the following steps:
  1. Click Start - Run.

  2. Type: nslookup

  3. Hit Enter.

  4. Type: server [Server IP Address or Server Hostname of the DNS Server you wish to utilize]

  5. Hit Enter.

  6. Type: [Server IP Address or Server Hostname to lookup]

  7. Hit Enter.
This issue has been resolved.  You are now using the specified DNS Server to perform nslookup.

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Microsoft Windows Server 2012 + Second Copy + Recycle Bin

When using Center Systems Second Copy on Microsoft Windows Server 2012, you may encounter the error message: "The Recycle Bin on [Drive Letter]:\ is corrupted.  Do you want to empty the Recycle Bin for this drive?"  When you click Yes, the dialog box only reappears.  To resolve this issue:
  1. Open an Elevated Command Prompt.

  2. Type: rd /s /q [Drive Letter]:\$Recycle.bin

  3. The Recycle Bin for that Drive Letter is then deleted.  Open Second Copy.

  4. Click Edit.

  5. Click Options.

  6. Click the Copy tab.

  7. Uncheck "Move deleted files to Recycle Bin."

  8. Click OK.
This issue has been resolved.

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Configuration Manager: The specified device instance handle does not correspond to a present device

When opening or closing a Service in the Services Control Panel, you may encounter the message: "Configuration Manager: The specified device instance handle does not correspond to a present device."  To resolve this issue, please perform the following steps:
  1. Click Start - Run.

  2. Type: regedit

  3. Click OK.

  4. Browse to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\[Service Name].  For example if the Automatic Updates Service is displaying this message, you would browse to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv.

  5. Right-mouse click the registry key and Export the registry key in order to make a backup.

  6. Delete the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\[Service Name]\Enum. For example, delete HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\Enum.

  7. Close RegEdit.

  8. Click Start - Shutdown - Restart.
This issue has been resolved.

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Wednesday, December 10, 2014

What VPN Client software do you use with a Watchguard VPN?

On Microsoft Windows computers, the operating system does not include a native IPSec VPN Client that is compatible with the Watchguard IPSec VPN.  On Microsoft Windows computers, you must use a third-party application.  You can use the free and open source Shrew Soft VPN Client Standard for Windows.  When you install the Shrew Soft VPN Client, it defaults to installing the Professional version which requires a charge.  Please select Standard when installing the Shrewsoft VPN Client.

Please Note: It is also possible to use the WatchGuard IPSec Mobile VPN Client software to access the Watchguard IPSec VPN.  However the WatchGuard IPSec Mobile VPN Client is a commercial product that requires a fee.  It is also important to note that you do not want to install both the WatchGuard IPSec Mobile VPN Client and the Shrew Soft VPN Client on the same computer.  If you do so, your LAN connection will fail due to a conflict between the two programs. If this occurs, simply uninstall one of the IPSec VPN Clients and reboot Windows.

On Apple Mac OSX, Apple iOS, Android 4.x and later devices, the operating systems includes a native IPSec VPN Client that is fully compatible with the Watchguard IPSec VPN.

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How do you setup a VPN using an ISP modem that does not offer Bridge Mode nor a Public Static IP Address?

Public Static IP Address

You may find the ISP does not provide a Public Static IP Address with a Business Account or any account type.  An example of this would be Clear Wireless Internet.  This issue can be surmounted by utilizing the DynDNS capabilities that exist within the modem and/or firewall you are using.  It may be preferable to upgrade the ISP modem to their currently supported model.  In the example of Clear Wireless Internet, this would be the Gemtek Clear Hub Express.

ISP Modem Bridge Mode

If the ISP modem does not have the capability of going into Bridge Mode, it may have the capability of utilizing IP Passthrough.  You would then enable IP Passthrough and disable the ISP Modem firewall as the subsequent firewall appliance for the VPN will block inbound internet traffic.  Or you could define port-forwards within the ISP modem rather than disabling the ISP modem firewall.

In the Clear Wireless Gemtek Clear Hub Express:
  1. Select Advanced Settings – Router – DynDNS Information  

  2. Select Advanced Settings – Router – IP Passthrough – Enable/Check IP Passthrough

  3. Select Advanced Settings – Firewall – Enable Firewall – Disabled/Uncheck Enable Firewall

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Watchguard Technologies XTM - Port 4100 Unavailable

You may find that Watchguard Technologies VPN Documentation refers to the use of Watchguard Authentication Port 4100 but it does not illustrate this port is Disabled by default nor does it illustrate the method for enabling Watchguard Authentication.  Following are the steps to enable Watchguard Authentication Port 4100:
  1. Browse to Watchguard XTM Web UI.

  2. Click Firewall.

  3. Click Firewall Policies.

  4. Click Add Policy.

  5. Select Packet Filter.

  6. Select Packet Filter from drop down list WG-Auth.

  7. Select from Any-External to Firebox.

  8. Click Save.

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How do you upgrade Watchguard XTM Fireware?

 To upgrade Watchguard XTM Fireware:
  1. Make a Backup Image of the Watchguard XTM Firewall.

  2. Download the latest stable Watchguard XTM Fireware binary for your Device.

  3. Browse to Watchguard XTM Web UI.

  4. Click System.

  5. Click Upgrade OS.

  6. Browse to the previously downloaded Watchguard XTM Fireware binary.

  7. Click Upgrade.

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Alan Curtis and A1 Smart Computer Services provide programming examples and technical information for illustration only without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose.

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