scientific_debugging_hdd_attached_to_optimum_router_isnot_visible.md

scientific_debugging_hdd_attached_to_optimum_router_isnot_visible.md

Status - [Closed]

Overview

• Reported on - 2020-04-23
• Last updated on - 2020-04-24
• Environment - All
• Investigators
  • Joy George K

Description

Connected external hard disk to Optimum provided router model D-Link DIR-868L into its USB 3.1 port. But its not visible to Win 10 machines in the network.

Reproduction steps

1. Connect HDD to router
2. Navigate to \192.168.1.1 in windows explorer

Expected result

• The drives in the HDD should be visible after an auth prompt

Actual result

• Error
  • Title Network Error
  • Windows cannot access \192.168.1.1

Observations

• Optimum router page shows the connected hard disk and the drives in it.
• Clicked on the Diagnostics button in error message but issue not resoled.

Workaround

• Connect the external HDD directly to computers than accessing as NAS \share
• Connect the external HDD to computer and expose share from the computer

Debugging

Hypothesis	Prediction	Experiment	Results	Conclusion
Router needs restart	If we restart the issue will be solved	Restart router	Issue not solved	Rejected
Using wrong IP of router	If we use right IP it will work	Find the ip address ipconfig command and use it	Not resolved	Rejected
SMB Ports 139 and 445 are not open	If the ports are open it will work	telnet to the ports to 192.168.1.1	Ports are open	Rejected
Win10 doesn't support SMB 1.0 which is used by router	If we enable SMB 1.0 in Win10, it will work	Enable SMB 1.0 in Win10 and test	The share worked at \192.168.1.1	Accepted

Root cause

• The D-Link DIR-868L doesn't support latest SMB. Just the SMB 1.0
• Windows 10 disabled SMB 1.0 by default from version 1709 onwards

Solution

• Enable SMB 1.0 in Windows 10

Next steps

• Better get a router supporting SMB 3 as the SMB 1.0 is out of date.

References

• N/A