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Firewall Applications Prevent Network Communication: A List of Possible Blocked Processes and Lexmark Ports

Document ID:SO4852

Usergroup :External


Cannot communicate; Unable to print; Unable to scan; Unable to associate; Unable to authenticate; Scanback failure; Lmabcoms error; scanwiz; Process blocked; Port blocked; Lexmark application will not communicate; Printer Communication System has encountered a problem and needs to close; Unable to perform scan; Failed to locate the printer specified; Ask print greyed out; Firewall prevents communication; Cannot print; Cannot create port; Cannot scan; Cannot discover printer; Status messenger not working;


Microsoft Windows Vista; Microsoft Windows XP Professional x64 Edition; Microsoft Windows Server 2008; Microsoft Windows Server 2003; Microsoft Windows XP; Microsoft Windows NT, Terminal Server; Microsoft Windows 2000 Advanced Server


What you will see

A Lexmark printer process is blocked by a certain Microsoft firewall client ver. 4.0.3441.633Click here for an illustration.


Possible symptoms and error messages

  • Communication failure error
  • "Printer Communication System has encountered a problem and needs to close"
  • Microsoft Error report which contains LMabcoms.exe and LMabipl.dll file names 
  • "Failed to locate the printer you specified"
  • A grey "Ask Printer" under PropertiesInstall Options
  • Other printers utilizing Lexmark port monitor or Lexmark enhanced communications software suffer similar errors. 
  • Other process errors that may involve any of the processes utilized by the MFP or printer. See table below.


Before you begin

Understand the different types of firewalls: 
  • 3rd party software-based firewalls
  • Operating system-based firewalls
  • Computer hardware BIOS firewalls
  • Router hardware firewalls
  • VPN firewalls


Recommended solution

To resolve this issue, please update the MS Firewall Client to version to 4.0.3442.654.

Updating the firewall application is one possible solution for a blocked process. Otherwise, reference the table below and make sure that the following processes are successfully added to your firewall application's exceptions list.


Primary Processes and Ports Table ('09)

Processes Ports Function
InstallGui.exe UDP 5353 Installer
pssu.exe (print server setup utility) UDP 9300 or 9340 print server (TCP/IP) setup utility

Application process 

Note: Varies by network TWAIN
compliant application.

HTTP 80 or HTTPS 443 Network TWAIN
scanwiz.exe HTTP 80 or HTTPS 443 Scanback Utility
lmabcoms.exe UDP 9200 Discovery and Port Creation
lmabcoms.exe TCP 9400 Printing (Enhanced TCP/IP Port)
lmabcoms.exe UDP 9300 or 9340 Bidi communication


Related Article


Still need help?

If you need additional assistance, please close this window, go to your product's support page and locate  Get In Touch with Lexmark! for contact information. NOTE: When calling for support, you will need your printer model/machine type and serial number (SN).

Please be near the products described in this article to expedite the support process and reduce call-back situations.


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