To require samba clients running 'smbclient' to use packet signing, add the following to the '[global]' section of the Samba configuration file, '/etc/samba/smb.conf': 'client signing = mandatory' Requiring samba clients such as 'smbclient' to use packet signing ensures they can only communicate with servers that support packet signing. [mandatory/auto/disabled] Packet signing can prevent man-in-the-middle attacks which modify SMB packets in transit. oval:org.secpod.oval:def:48752 oval:org.secpod.oval:def:48422 SCAP Repo OVAL Definition 2018-11-08