cyberstrikeus 7.4.1 Install TCP Wrappers (Scored)
Profile Applicability
- Level 1
Description
TCP Wrappers provides a simple access list and standardized logging method for services capable of supporting it. In the past, services that were called from inetd and xinetd supported the use of tcp wrappers. As inetd and xinetd have been falling in disuse, any service that can support tcp wrappers will have the libwrap.so library attached to it.
Rationale
TCP Wrappers provide a good simple access list mechanism to services that may not have that support built in. It is recommended that all services that can support TCP Wrappers, use it.
Audit Procedure
Using Command Line
Run the following to ensure tcpd is installed:
dpkg -s tcpd
Ensure package status is installed ok installed.
To verify if a service supports TCP Wrappers, run the following command:
ldd <path-to-daemon> | grep libwrap.so
If there is any output, then the service supports TCP Wrappers.
Expected Result
Status: install ok installed
Remediation
Using Command Line
Install tcpd:
apt-get install tcpd
Default Value
TCP Wrappers is not installed by default.
References
- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
Profile
Level 1 - Scored