My file setup¶

[global]
   server min protocol = SMB3
   server max protocol = SMB3
   ntlm auth = ntlmv2-only
   server role = standalone server
   obey pam restrictions = yes
   unix password sync = yes
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
   pam password change = yes
   map to guest = never
   encrypt passwords = yes
   security = user

[SHARE_NAME]
   path = /srv/data
   browseable = yes
   read only = no
   smb encrypt = mandatory
   ; Enforces encryption for the share (requires SMB3 clients)
   valid users = username1, username2
   force group = group_name
   create mask = 0660
   directory mask = 0770

This is a solid for a secure and functional setup. Key points include:

1. Strong Protocols and Authentication:
- Enforcing SMB3 and NTLMv2-only authentication enhances security.

2. Server Role and User Management:
- Configured as a standalone server with PAM (Pluggable Authentication Modules) restrictions and UNIX password synchronization.

3. Share Configuration:
- The share is well-configured with mandatory SMB encryption, making it secure for SMB3 clients.

4. force group ensures that files and folders created within the share belong to the "nextcloud" group.

5. create mask and directory mask define the permissions for new files and directories created in the share.

Overall, this configuration promotes strong security practices while ensuring functionality. Just ensure that your network environment and all clients are compatible with these settings.