I vaguely remember an issue about a system with multiple green interfaces.
What's in /etc/samba/smb.conf?
I have:
interfaces = 127.0.0.1 192.168.x.0/24 (green network)
hosts allow = 127.0.0.1 10.9.9.0/255.255.255.0 192.168.x.0/255.255.255.0(10.9.9.0 is the vpn network)