Prevent unwanted computers from connecting to your wireless network

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FAQ - Frequently asked questions

This FAQ section is primarily for technical questions and support issues. There are specific sections for licensing, usages and intrusion solutions.

Specific sections

WILL LANeye SOLVE MY PROBLEM - What LANeye can be used for.

COMPARE FEATURE SET - What LANeye variant fits my needs.

SYSTEM REQUIREMENTS - Will LANeye run on your computer?


SECURE PAYMENT OPTIONS - How to buy and make secure payments.

Technical installation and setup questions and answers

LANeye and Multiple subnets?

LANeye monitors ethernet traffic and can see all network traffic that belongs to the same broadcast domain. Using routers or VLAN to create subnets that divide your network into multiple networks with different broadcast domains requires you to install LANeye in every subnet you want to monitor.

Learn more about how network works and how LANeye make use of that under
"Network Technology - How network works":

Network Technology - How network works

Can LANeye run on Windows 2003/2008 server?

LANeye have not been official tested on Win2003/2008 server. Several users say it works. However we do not guarantee any functionality and you may test on your own risk.

Run LANeye on a server can be very convenient. Please be aware that:

  • LANeye may put extra load on your server.
  • LANeye makes a safer job running on separate computer. If your server been put out of order LANeye will still monitor the network traffic and its log files can be checked later.
  • It is not recommended to run LANeye on a machine that serves a database engine since database queries may load the system and starve LANeye CPU time to a degree where LANeye is not able performe it tasks.

Will LANeye run on 64bits Operating Systems?

No. Current version of LANeye only runs on 32bit Microsoft Operating System. The support for 64bits OS will be available in later versions.

"Failed to copy file: C:\Program Files\Laneye.exe" error message during installation

If you get a copy file failed error during the installation phase there may be a previous LANeye installation on your machine that is somewhat corrupt or miss configured. To resolve this problem two (2) directories on your hard drive have to be removed manually.

On Windows Vista, the following folders have to be removed (including all files in them):

  1. Delete the folder "C:\ProgramData\LANeye"
  2. Delete the folder "C:\Program Files\LANeye"

On Windows XP/2000, the following folders have to be removed (including all files in them):

  1. Delete the folder "C:\Documents and Settings\All Users\Application Data\LANeye"
  2. Delete the folder "C:\Program Files\LANeye"

Now LANeye can be installed again.

"Can not write to c:\...\laneye.ini" error message

If you get a "Can not write to c:\...\laneye.ini" error message, your LANeye installation are corrupted in some way and have to be reinstalled. Use the same procedure as in "Failed to copy file: C:\Program Files\Laneye.exe" error message during installation description above before trying to reinstall LANeye.

LANeye could not be activated. A error message says that a link to LANeyeSRV Network Service could not be established.

This will happened if the service that comes with LANeye do not run. There are a few similar error messages, some with the error code #1703.

This could be caused by several things:

  • LANeyeSRV.exe have been blocked by your AntiVirus software.
  • LANeyeSRV.exe have not succesfully been installed.
  • Windows can not find LANeyeSRV.exe

First make sure that LANeyeSRV.exe (runs as a service) have not been listed as blocked in your AntiVirus software control list. This is most often a separate list over programs that are allowed to run on your machine and not the same list as the Virus Quarantine. Since LANeyeSRV.exe runs as a service the Anti Virus blocking takes place before windows have completed boot up and therefore no message dialog will be shown.

To make sure LANeyeSRV.exe runs on your system, check running services in the service dialog found among the administration tools in windows control panel.

The list of services should include LANeyeSRV.exe that is automatically started and running. You may start and stop the LANeyeSRV.exe from this list and try LANeye again.

If LANeyeSRV.exe is not on the list of installed services, you may try to install LANeyeSRV.exe by hand, using the following command from the command prompt:

"c:\program files\laneye\sys\laneyesrv.exe" /install

This command should result in a dialog saying LANeyeSRV.exe have been succesfully installed.

In some cases Windows can not find the LANeyeSRV.exe when LANeye is installed under "c:\program files\..."

When trying to start the service manually from the "control panel" -> "Administrative Tools" -> "Services" the following error occur "Service error 193: 0xc1"

Service error 193: 0xc1 means that windows can not find LANeyeSRV because there is a file named "program" on the root drive c:\ or d:\. remove this file to correct the problem. There also can be a folder with the name "program" After removing the file and that didnt solve the problem, you may move the LANeyeSRV.exe to a separate folder, under c:\laneye\LANeyeSRV.exe, do like this:

  1. Create a new folder, c:\laneye
  2. From command prompt, run "c:\program files\laneye\sys\LANeyeSRV.exe" /uninstall
  3. Move LANeyeSRV.exe from c:\program files\laneye\sys\LANeyeSRV.exe to c:\laneye\
  4. From command prompt, run c:\laneye\LANeyeSRV.exe /install

And now, activate LANeye

LANeye do not detect any computers?

  1. LANeye may not be activated. Click the activate button on the toolbar.
  2. There is no surrounding file opened and therefore LANeye could not be activated.
  3. Shut down you software Firewall.
  4. Wrong network adapter have been selected. Open the general settings dialog and go to the tab "Adapter" and change the network adapter.

Shall I allow LANeye access through my software Firewall?

If you have a software Firewall installed it may detect that LANeye want access through. LANeye wants access through your Firewall by several reason.

  1. When LANeye sends blocking packets to prevent computers from gaining access to your network.
  2. When LANeye checks IP-addresser and device names.
  3. When LANeye send email alarms.
  4. When LANeye update menus and dialogs with web URLs LANeye contacts our update servers at (and sometimes our backup sites and
  5. When you register using the registration dialog.

Your Firewall will detect these calls. It is up to you to decide if you allow LANeye through your Firewall or not. These calls are all harmless. Be aware that if you not allow LANeye through the Firewall, LANeye will not be able to perform the above listed functions.

Functional technical questions and answers

LANeye finds numerous of computers that do not belong to my network.

LANeye is very sensitive. One single data packet is enough for LANeye to reveal a computer. If your internet service comes via cable there is a good chance that you are on a local network without knowing that. This technique is very common and you shall always separate your home network from your IPS with a router.

High CPU load.

LANeye 2.3 have been optimized to load your computer by a minimum. Typical for LANeye 2.3 is that it will take less than 1% CPU time on a 2GHz Pentium 4 machine on a network with 500 computers.

LANeye names found devices by vendor names only.

LANeye resolves only devices that have local IP-addresses. This means that LANeye only resolve devises name in the following IP ranges:

  • 192.168.x.x
  • 172.16.x.x - 172.31.x.x
  • 10.x.x.x

In addition to that, names are resolved if ARP packets found even if there IP-addresses are outside these given ranges.

Devices like WLAN access points and routers that has not been given a DNS name will be named by their vendors. All devices do not have names.

LANeye finds devices that have no IP-address.

LANeye listening to raw network traffic. There may be devices on your network that communicate but do not use the IP-protocol (even when this is rare now a days). Some devices have no or very few reason to send broadcast packets. Typical network printers often have very low broadcast rate. For these devices it may take some time for LANeye to identify them.

I have problem when switching user.

LANeye do not support user switching. LANeye is meant for a single user machine. The support for multi user may be improved in the future.

When LANeye is activated devices changes name.

LANeye rename listed devices from time to time. The naming scheme is built up from several sources of name. If you want to take control over and prevent automatic naming you should enter a name of your own. When doing so the name shall not start with "\\" and shall not include any "?" signs.

Learn more about how LANeye names devices under "LANeye Technical Descriptions":

HOW LANeye WORKS - Automatically naming devices

LANeye could not be activate. Detected network is not the same as LANeye is trained for.

Network surrounding files are marked with your default gateway (router). If you change your router LANeye will complain and say that LANeye is not trained for this network. Some versions of LANeye are more sensitive than others to this.

If you know that you are on the same network there is a walk around to get rid of this message without creating a new surrounding. In LANeye Professional Edition there is a settings dialog to fix this problem. In LANeye Small Network Edition you have to changes a few things in the surrounding file directly by hand.

LANeye Professional Edition - Open the LAN node property dialog by right click the LAN node (top item in the tree list to the left). Change the setting "Prevent activation on other networks" to "Confirm reassociation before activation on another network"

LANeye Small Network Edition - Open your network surrounding file using notepad.exe and remove the parameter data from the following parameter names "AssociatedGatewayIPaddress" "AssociatedGatewayMACaddress" "AssociatedGatewayOUI" under section "[PROPERTIES]" leaving you with a surrounding file that now shall start like this:






LANeye do not list all my network cards

If the list of selectable network cards do not reflect all your network cards, especially if you have PC/SD-cards or USB-sticks the LANeyeSRV.exe have to be restarted to fix this problem.

  1. Shut down LANeye
  2. Open the windows "control panel" - "administration tools" - "services" and in the list, select LANeyeSRV.exe
  3. Stop the LANeyeSRV.exe and then Start the LANeyeSRV.exe
  4. Start LANeye again and the list of selectable network cards no reflects all active network adapters on your computer.

Known bugs

Access Violation Error and LANeye becomes unresponsive from the tray

On networks with malformed DHCP packets LANeye become unresponsive and cause Access Violation Mesages.

Bug fixed in version

LANeye autostart fails when starting Windows (Error 1703 - 1705)

On some machines LANeye fails to start when starting windows.

Bug fixed in version

LANeyeSRV hangs and consumes 30-90% CPU and/or consumes large amount of memory 100-300MB

On some machines running on networks with more than 100 computers LANeyeSRV hangs and consumes a lot of CPU and/or memory.

Bug fixed in version

LANeye from time to time shows a slow response detecting new computers.

On network where packet storms occur LANeye seams to take a while to detect new machines.

Bug fixed in version

Introduction Guide doesn't show when selected from the top menu under "Help"

When LANeye installs to systems that are localized to none US English language, the introduction guide do not show up.

Bug fixed in version

Help window blank, no help is shown

When LANeye installs to systems that are localized to none US English language, the help file shows up blank (empty)

This problem happens randomly on some systems and permanent on others.

Bug fixed in version

Error Message "Can not change property when active"

Occur on some systems after wakeup from sleep/hibernate.

Bug fixed in version

Error Message "LANeyeSRV Network Service was stopped. LANeye was deactivated".

Occur on some systems when starting other applications or when connection via remote desktop.

Bug fixed in version

Toolbar buttons "goes nuts" and change shape and switches functions.

In W2K and WinXP and when "Pause" and "Learn" buttons are made visible, some times all buttons on the toolbar becomes wider and behave strange.

Bug not yet fixed. The problem is somewhere in between LANeye and Windows API.

Avalanche of help windows.

When double click very fast on the toolbar help button, the Internet Explorer starts to open hundreds of help windows.

Bug not yet fixed and applies to all LANeye versions.


Not finding what your are looking for?

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CONTACT - Support, Customer Service, Bug Report or Feature Suggestion.

Network Intrusion Detection Software

Free to try

Price: $59 USD

Free to try

Price: $131 USD

LANeye 2.3 for Windows

You can run LANeye 2.3 on:

- Windows 7

- Windows Vista

- Windows XP

- Windows 2000

No server needed.

Runs on any network connected computer.

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