3.4.2 Ensure /etc/hosts.allow is configured

Information

The /etc/hosts.allow file specifies which IP addresses are permitted to connect to the host. It is intended to be used in conjunction with the /etc/hosts.deny file. The /etc/hosts.allow file supports access control by IP and helps ensure that only authorized systems can connect to the system.

Solution

Run the following command to create /etc/hosts.allow: # echo 'ALL: <net>/<mask>, <net>/<mask>, ...' >/etc/hosts.allow where each <net>/<mask> combination (for example, '192.168.1.0/255.255.255.0') represents one network block in use by your organization that requires access to this system.

See Also

https://workbench.cisecurity.org/files/1866

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7(5), CSCv6|9.2

Plugin: Unix

Control ID: f9a83339d50efab2a26ecb641d3c5bcdf0a6125cbe5918c5a7a51f03236daa7c