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Windows 2008 R2, Trouble with Connecting to a Buffalo NAS Device

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Issue: One Windows 2008 R2 64bit server on the network unable to connect to a buffalo Device (Linkstation) with firmware version 1.56. There are a total of four servers on the network this being one of them.

Troubleshooting Steps:
  • Command line: net view \\servername | NOPE
    • System error 53 has occurred, the network path was not found
  • Command line: net view \\192.168.1.x | NOPE (note: ping the actual IP address of the device)
  • Command line: net view /cache | Server is viewable but still get "System error 53"
  • Disabled Firewall | NOPE
    • Services Windows Firewall
  • Disabled Antivirus | NOPE
  • Tried to connect from another Windows 2008 R2 server, OK no issues.
  • Checked Network Settings, IP, DNS, WINS all the same (except the actual IP DUH!)
  • Ping both the NETBIOS name and IP address | OK
  • Clear and Reset: arp, nbtstat, ipconifg (from an elevated command prompt)
    • Elevated command prompt: arp -d
    • Elevated command prompt: nbtstat -R (must be capitalized)
    • Elevated command prompt: ipconfig /flushdns
    • Wait a few moments...
    • Elevated command prompt: nbtstat -RR (must be capitalized)
    • Elevated command prompt: ipconifg /registerdns
  • No errors in either Application log or the System log.
  • Ensured the SMB1 and SMB2 are installed working and enabled.
    • Powershell prompt: Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters" SMB1 -Type DWORD -Value 1 -Force
    • Powershell prompt: Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters" SMB2 -Type DWORD -Value 1 -Force
    • Restart System must do for the above to take effect and before doing the below…
    • Elevated command prompt: sc.exe config lanmanworkstation depend= bowser/mrxsmb10/mrxsmb20/nsi
    • Elevated command prompt: sc.exe config mrxsmb10 start= auto
    • Elevated command prompt: sc.exe config mrxsmb20 start= auto
    • Restart again (and if you have been doing this as long as I have you start to think are we back in the days of Windows 3.11)
  • Validated the Local Security policies (secpol.msc) | Security Settings > Local Policies | Security Options
    • Review all the policies "Network access:" with the machine that does work and make contact to the buffalo device.
    • Do not delete either update or add, and document what your changes are (before and after) so if this breaks something else you can take it back.
  • Review the Workstation services settings: HKLM\SYSTEM\CurrentControlSet\services\LanmanWorkstation\Parameters to those of the working server.
    • My change wound up being the "RequireSecuritySignature" value needed to be 0 (Disabled)



Name
Type
Data


(Default)
REG_SZ
(value not set)


EnablePlainTextPassword
REG_DWORD
0x00000000 (0)


EnableSecuritySignature
REG_DWORD
0x00000001 (1)


OtherDomains
REG_MULTI_SZ



RequireSecuritySignature
REG_DWORD
0x00000000 (0)


ServiceDll
REG_EXPAND_SZ
%SystemRoot%\System32\wks


ServiceDllUnloadOnStop
REG_DWORD
0x00000001 (1)




Reboot so the changes take effect, test and hope this works for you as well.
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