Carestream: Disable SMBv2 for Pervasive

Last Updated: April 12th, 2018/Published On: February 20th, 2015/By /Views: 2651/

SMB2 to SMB1 on 2008 R2


  • To enable or disable SMBv2 on the SMB server, configure the following registry key:
    • Registry subkey:
      • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters
      • Registry entry: SMB2
      • REG_DWORD: 0 = Disabled
      • REG_DWORD: 1 = Enabled
      • Default: 1 = Enabled

Batch File

  • Available at: T:\Dental\Softdent Speedfix.bat


  • To disable SMBv2 and SMBv3 on the SMB server, run the following cmdlet:
    • Set-ItemProperty -Path “HKLM:\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters” SMB2 -Type DWORD -Value 0 -Force

Client Side

  • To disable SMBv2 and SMBv3 on the SMB client, run the following commands:
    • sc.exe config lanmanworkstation depend= bowser/mrxsmb10/nsi
    • sc.exe config mrxsmb20 start= disabled

Testing Network if desired

  • Nmap to scan network connections:
  • Use format with switches:
    • nmap -sV -p 445 -T4 -A -v (server IP or target)
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