Notes

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2/21/26

Networking

Notes

Home

from the Gemini conversation:

Samba Share Connection Troubleshooting

h_hh_ll

Symptom

Likely Cause

Fix

Linux

"Check spelling" immediately

Networking/Firewall

Ping the IP; check ufw

Windows

The "Ping -t" Diagnostic

Long delay, then error

Hostname resolution

Use IP address instead of name

Notes

To see the blockage in real-time:

Prompts for password, then fails

Samba Password

sudo smbpasswd -a user

Template

On Windows, open a command prompt and type: ping -t 100.x.y.z (the Debian Tailscale IP).

"Access Denied" after login

Linux Permissions

chown the directory

While that is running, go back to your Debian terminal and run: sudo tcpdump -i tailscale0 icmp.

If you see pings in tcpdump but NOT port 445: The network is fine, but a firewall (likely Windows) is specifically targeting and killing SMB traffic.

If you see neither: The Tailscale tunnel itself is restricted.

After switching the Windows Tailscale profile to "Private," does the tcpdump -i tailscale0 port 445 command start showing any text?