Linux

2/21/26

Networking

Linux

The "Triple Threat" of Linux networking:

The "Tailscale IP" Advantage

Because you used the Tailscale IP, this share will now work whether you are sitting at home or at a coffee shop in another country,

Tailscale interface bind

as long as both devices have Tailscale turned on. No port forwarding or VPN configuration is needed!

Windows Firewall profile

Linux filesystem permissions

Variations of commands used.

ls -ld /var/www/html

chmod 711 /home/mdh

sudo chmod -R 775 /path/to/share

The "Permission" Fix

sudo chown -R mdh:mdh /path/to/share

The "Ownership" Fix

sudo chmod 755 /home/mdh/your_shared_folder

# Grant read/execute permissions to the folder path

sudo chown mdh:mdh /home/mdh/your_shared_folder

# Ensure you (the user) own it

sudo tcpdump -i tailscale0 port 445

sudo ss -tulpn | grep :445

sudo ss -tulpn | grep smbd

sudo apt update && sudo apt install tcpdump -y

sudo systemctl restart smbd

sudo systemctl restart smbd nmbd

sudo smbstatus

sudo testparm

After changing the config, always run:

sudo tail -f /var/log/samba/log.smbd

sudo nft list ruleset

Check if ANY firewall is active

sudo firewall-cmd --add-icmp-block-inversion --permanent

sudo firewall-cmd --reload

sudo firewall-cmd --state

sudo ufw allow samba