• Using Windows XP I can no more connect to Internet after a Windows update.
   

• Is Look 'n' Stop compatible with Windows Vista ?
   

• How does the Look 'n' Stop licence work ?
   

• Look 'n' Stop does not seem to work properly.
    

• I can not connect anymore to the internet.
   

• One of my software can no more connect to the Internet ?
   

• Some ports are "closed" and not "stealth" in a security test ?
    

• The file sharing does not work on my network.
   

• Can I install Look 'n' Stop 2.06 over the 2.05 version ?
   

• What is an Internet filtering rule ?
   

• A driver is not removed after uninstalling (Windows 2000 and XP)
   

• "Connected" is not checked on the Welcome page
   

Using Windows XP, I can no more connect to Internet after a Windows update.

After the installation of patch KB951748 from Microsoft, standard rulesets provided with Look 'n' Stop have to be modified since the local ports used by UDP DNS connections have changed. 
The following additional rule solves this issue:

 

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Is Look 'n' Stop compatible with Windows Vista ?

Look 'n' Stop 2.06 replaces Look 'n' Stop 2.05 which is no more supported.
 

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Look 'n' Stop does not seem to work properly. What can I check ?

You shall check the items below.

• In the Options page, check that one network adaptor is selected. Learn more about network adaptors.

• In the Internet Filtering page, check that the Internet Filtering enabled checkbox is checked.

• In the Application Filtering page, check that the Internet Filtering enabled checkbox is checked.

• In the Welcome page, the Connected to the Internet read-only checkbox has to be checked. There must be a valid IP address.

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How does the Look 'n' Stop licence work ?

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Can I install Look 'n' Stop 2.06 over the 2.05 version ?

Yes. You can do this for free.

You do not need to uninstall the release 2.05.
You do not need to shut it down.

You just have do download and run the setup file.

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One of my software can no more connect to the Internet ?

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What is an Internet Filtering rule ?

Before reading this chapter, you shall read the Internet Security FAQ page

An Internet filtering rule is a filtering procedure that can authorize or block an inbound or outbound data packet.
Internet filtering relies on an internet filtering ruleset.

Each rule has 5 attributes that may or may not be checked : , , , , .

	The Rule is ON (active). This options allows you to temporarily  deactivate a Rule without erasing it. Usually, all Rules are ON.
	If the STOP sign is checked, the Rule blocks all the data  corresponding to the Rules definition. If it is unchecked, the data are  authorized.
	The Rule will warn you when a data packet corresponding to the Rule  arrives. It allows you LOOKing at the data in the Log page. A dialog  window and an audio signal (a .wav file of your choice) can also be  chosen to appear. It depends on the options you choose in the  Options tab. It also depends on the    attribute (see below)
	Advanced mode options
	If a data packet matches a Rule's definition, the Rules after it (from top  to bottom) will not apply. Usually all the Rules have this option  activated   As this attribute is not the most important one, it is only displayed if  the Advanced mode is checked in the advanced Options.
	This attribute allows a rule per rule selection of rules for which a   message box appears when a data packet matches the rule. The  Message Box check box of the Options tab also has to be checked if  you want to authorize message boxes at global level.   As this attribute is not the most important one, it is only displayed if  the Advanced mode is checked in the advanced Options.

A rule is used to filter out some data packets in order to block them (check the  sign) or authorize them (unheck the  sign).
Look 'n' Stop also allows you observing the data packets meeting the rule's definition (check the  sign) or not (uncheck the  sign).

For most of you, you will not have to edit rules yourself. The Look 'n' Stop pre-installed rulesets are fine. You shall load the EnhancedRuleset.rls ruleset through the Internet Filtering page for a better security.
If you need specific rules, you can import them from this page.

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Application filtering versus Internet Filtering ?

So, outbound filtering applies at two levels. The data sent by an application authorized by application filtering must also be authorized by Internet filtering before being sent to the network.

Using advanced options, application filtering can be tuned to restrict each application to transmit on some TCP/UDP ports, whatever Internet filtering applies.

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I can not connect anymore to the Internet?

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The file sharing does not work on my network.

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Some ports are "closed" and not "stealth" in a security test ?

Many reasons can explain this result.

- The network adapter is not correctly selected. Clic here to learn how to select the correct network adapter.

- The security test might not be reliable. Here is the most famous online security tests: ShieldUp (www.grc.com).

- You might run the test through a proxy. In this case, the proxy is under test, not your PC. Configure your browser with no proxy.

- You might connect through a router that blocks the test before it reaches your PC. Read your router's documentation for more details.

- Your ISP (Internet Service Provider) applies "egress filtering". In this case, some ports are forbidden by your ISP. There is no way to solve this issue.

- You might have modified you Internet Filtering rules so that you authorize too much trafic. Load the Look 'n' Stop enhanced ruleset.

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A driver is not removed after uninstalling (Windows 2000 and XP)

In very few cases, it may happen that a driver is not removed after the automatic uninstall. Here is the procedure to manually remove Look 'n' Stop drivers (Windows 2000 and XP).

• Step 1
  - Be sure to restart your PC after uninstalling Look 'n' Stop through the Windows Start menu.
  - Try to remove drivers manually if some of them stay in the device manager.
  
  If some drivers can not be removed (Windows error message), go to step 2.
  

• Step 2 (if required)
  

1.start regedit.exe from the Start menu.
  
2.search for Look 'n' Stop inside the registry, you probably find some in:
SYSTEM\CurrentControlSet001\Class\
{4D36E972-E325-11CE-BFC1-08002BE10318}\000x
SYSTEM\CurrentControlSet002\Class\
{4D36E972-E325-11CE-BFC1-08002BE10318}\000x
SYSTEM\CurrentControlSet\Class\
{4D36E972-E325-11CE-BFC1-08002BE10318}\000x
 
x depending on your system.
 
3.remove all the 000x containing Look 'n . Be careful to not remove the first entries (0001, 0002, 0003...) which are most of the time used by Windows.
 
4.if the following key exist, remove it. [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\lnsfw1]
  
5.reboot
 
6.After the reboot, open the Device Manager and if there are no Look 'n' Stop driver entries, it's ok Look 'n' Stop drivers are uninstalled and there is nothing else to do. If not, go to step 3.

• Step 3 (if required)
   

1.start regedit.exe
 
2.search for S4E_LNS inside the registry, you probably will find some in:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\DeviceClasses\{ad498944-762f-11d0-8dcb-00c04fc3358c}
\##?#ROOT#S4E_LNSDRIVERMP#000x#
{ad498944-762f-11d0-8dcb-00c04fc3358c} with x = 0, 1 2, ...
 
3.remove the key  ##?#ROOT#S4E_LNSDRIVERMP#000x#{ad498944
-762f-11d0-8dcb-00c04fc3358c}
You will not be able to remove this key. You can let it. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\
S4E_LNSDRIVERMP
 
4.reboot your PC.

Here are recommandations to avoid these problems:
- Installation and uninstall with administrator rights.
- Reboot after uninstallation (even if you are not asked to).
- DO NEVER uninstall and reinstall without rebooting after uninstalling.
- If you see an "Add device" message box during installation, answer no to it.

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"Connected" is not checked on the Welcome page

This problem occurs when the Network Interface is not properly selected in the options page.
Stay connected to Internet and change the adapter selection in the option page. Clic the Apply button to validate and then go back to the Welcome page to see if the checkbox is now selected.

If you have several network interfaces you may have to do again the operation until you find the good adapter. Learn more about the network interface selection.

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