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Lexmark XS925

Lexmark XS925

Processes Blocked by Firewall Applications Prevent Scanning Functions (Lasers '12)


What you will see

Multiple symptoms may indicate a firewall is preventing communication.

  • Computer Connection Error displays after selecting the Scan Profile on the printer operator panel.
  • Computer Connection Error displays when selecting the scan toComputer option on the printer operator panel.
  • Or, you are unable to scan when initiating quick-scans from the printer operator panel, or scans from Lexmark Printer Home.
  • The problem persists after restarting the computer.
  • You receive an error report which contains any given LM... or lex... process. Click here for illustration.
  • You receive some other communication failure error message.

Before you continue...

You should eliminate other communication issues as a possible root cause for the symptoms described above.

First, if one function is failing you should always try another printer/scanner function to test communication.

For example

You cannot print, but you are able to scan...

Proceed to Suggested Remedy.

It is important to understand that other print queue-related issues are possible.

You cannot scan, but you are able to print...Proceed toSuggested Remedy.
You cannot scan or print...You should see Additional Actions to further validate printer-to-pc communication before proceeding to Suggested Remedy.

Additional Actions

1. Identify status "Connected" on the network setup (settings) page?

To do this from the operator panel:

  1. Press

    or equivalent Setup/Menus button on the printer operator panel.

  2. Navigate to Reports.

  3. Navigate to Network Setup Page and select it.

  4. Navigate to Print Setup Page and select it.

A status of 'connected' indicates the printer is communicating on a network; however, it does not necessarily prove that it is communicating on your network.
2. Access the printer's web page.

To do this:

  1. Obtain the IP Address off of the network setup page.

  2. Enter the printer's IP address into your Web browser's address field; e.g., http://Printer_IP_Address, where Printer_IP_Address is your printer's TCP/IP address.

This guarantees that your printer is communicating with your PC.

Suggested Remedy

It is possible that a scan function is not working because the process utilized by one of the printer functions is blocked.

Step 1: Identify you firewall application.

Step 2: Identify any blocked processes that begin with LM or LEX.

Step 3:Grant access or create an exceptionfor the process and a Microsoft™ Windows 7 Firewall Example

  1. Firewall Identification

Identify your firewall application and identify where you can make changes to your firewall protection settings.

IMPORTANT! This is where you will create exceptions for processes that are listed in the next step below.

Here is a list of possible firewall types, listed from the most common to least common found on PC:

  • 3rd party security software applications; i.e., antivirus software and other 3rd party firewall applications
  • Operating system firewalls
  • Computerhardware BIOS firewalls
  • Router hardware firewalls
  • VPN firewalls

Now that you have identified your firewall application and where you create exceptions for blocked processes, you will want to use the table below to identify whether a blocked process is visible.

Be aware of your printer model's prefix for the lscn.exe and mon.exe processes.

Model-specific prefixes, to include:

  • X790 Series<


  • X920 Series<


  • X950 Series<


  • X548 Series<



  • X6500e Scanner <<



Common prefixes: <LM>, <lex>

For example, LMACTmon.exe contains the prefix <LMACS> which references a LexmarkX792 printer.

Process <PREFIX> - lxcqFunctionPossible error/symptom if process blocked




Lean Scan

Required for successful Scan Profile communication.

For example, if you press Scan > Scan Profile...

Computer Connection Error is displayed on the printer.


Device Monitor

This listens for button presses from the device for operator panel-initiated scanning.

For example, if you press Scan > Computer...

No response when you press
, or a Computer Connection Error displays on the printer.

LMsmc.exe/ lmab1err.exe (All Models)

Status Monitor Center

Status Messenger in Windows

The Status Monitor Center controls:

  • Supplies alerts
  • Error message logs
  • Problem resolutions in certain situations
Logs and printer notifications will not be displayed.

LMpsu.exe (All Models)

Printer Setup Utility

Allows for the configuration of printer fax settings and address book settings. Lexmark Printer Setup Utility or Fax Setup Wizard utilizes this process. Unable to add/edit contacts or change settings on the printer from either of these utilities

LMwpss.exe (All Models)

Wireless Print Server Setup Utility

Necessary for the successful configuration your wireless printer. Lexmark Wireless Setup Utility requires this process. Gray Continue button and the inability to configure wireless configuration parameters on the printer

(All Models)












These associated local/networkTWAIN files require a network TWAIN compliant application to use them... If the application that uses these files is blocked by a firewall, then these are files are blocked by association. Make sure your scanning software (.exe) is not blocked by a firewall.


print server setup utility

The print server setup utility provides a secondary method for first-time printer configuration of static IP parameters.

The utility is unable to find the printer or you receive a message that the utility is unable to find the printer.

This utility does require the host PC be on the same subnet as the printer.

scanwiz.exe (All Models)

scanback utility

The scanback utility requires this process to assure a network communication path for scanback generated scan-to-pc profiles.Any created shortcut (profile) utilizing this utility will fail, or in some instances you will not even be able to create the profile depending on your firewall security level.

  1. Grant access or create exception in the Firewall Application

You have now identified the blocked process in your firewall application. You will now need to grant permissions in your firewall application to allow these processes to communicate over the network .

IMPORTANT! You need to know where your firewall software allows you to grant exceptions or permissions.

All firewall manufactures use slightly different terminology to reference this permission granting process; e.g., Permit Always, Allow Full Access, Allow, etc.

for some examples, but reference this article for the process names listed above.

Microsoft Windows 7 Example

If you receive a Windows Security Alert, make sure you select Allow access for any LM process:

How to grant firewall exceptions with Microsoft's Windows Firewall

If you do not allow access for all LM and LEX processes, you may need to follow the procedure similar to this one.

To open Windows Firewall and allow exceptions in Microsoft™ Windows 7:

  1. Click on Start.

  2. Click on Control Panel.

  3. Click on Windows Firewall.

  4. Click on Allow a program or feature through Windows Firewall.

  5. Click on Change Settings.

  6. Place a checkmark in the box next to any the processes that require exceptions.
    You may see more than one instance of the process. If so, make sure they are all selected for exceptions.

  7. Place a checkmark in the box for all logged-in network connections.

  8. Click OK.

Click here for more information provided by Microsoft™.


till Need Help?

If you need additional assistance, please contactLexmark Technical Support. NOTE: When calling for support, you will be asked for your machine/model type and serial number (SN). Please call from near a computer and printer in case the technician on the phone asks you to perform a task involving one or all of these devices.


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