I am using QEMU/KVM for virtualization of various guest systems and Samba to provide an exchange folder (shared-folder) between the host-OS and the guest-OS.
Now I want to protect this Samba-provided shared folder against foreign access. It should be accessible only by QEMU-virtualized guests, but not for other third party people in the same network.
My current configuration in /etc/samba/smb.conf looks like that:
[global]
workgroup = WORKGROUP
security = user
map to guest = Bad User
server string = %h server (Samba, Ubuntu)
dns proxy = No
wins support = Yes
usershare allow guests = Yes
panic action = /usr/share/samba/panic-action %d
lanman auth = no
ntlm auth = no
follow symlinks = yes
wide links = yes
load printers = no
disable spoolss = yes
[Shared]
comment = Shared Folder for QEMU
path = /home/myusername/Exchange
public = no
browseable = yes
writeable = yes
read only = no
guest ok = yes
force user = myusername
Now the central question is:
Do you have any recommendations how I could implement such a security hardening feature?
Thank you very much!
