Samba is the standard Windows interoperability suite of programs for Linux and Unix.

https://www.samba.org/samba/

Check Samba is running

Optimize Samba

Resolve rlimit_max below minimum Windows limit

Samba Configuration

Samba Configuration Detailed

Samba Configuration Printer

Set CIFS Version

SMB Protocol Versions

Test nmbd

Test Samba’s ability to authenticate users

Verify Samba configuration settings

How can I log what files are accessed what is done with those files and by whom? You need to use at least samba-2.2.7a and use the audit.so module.

The samba source code has what you need. Check out the information in ~samba/examples/VFS/audit.c and in the README file in that directory.