The smb.conf file must use the hosts option to restrict access to Samba.

From HP-UX 11.31 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

Associated with: CCI-000225

SV-35107r1_rule The smb.conf file must use the hosts option to restrict access to Samba.

Vulnerability discussion

Samba increases the attack surface of the system and must be restricted to communicate only with systems requiring access.

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Edit the smb.conf file and set the hosts option to permit only authorized hosts access Samba. An example might be: hosts allow = 127.0.0.1 192.168.2.0/24 192.168.3.0/24 hosts deny = 0.0.0.0/0 The above will only allow SMB connections from the localhost and from the two private networks 192.168.2 and 192.168.3. All other connections will be refused as soon as the client sends its first packet.

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