Guide to the Secure Configuration of Red Hat Enterprise Linux 7
Rules, Groups, and Values defined within the XCCDF Benchmark
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Ensure /etc/hosts.deny is configured
The file <code>/etc/hosts.deny</code> together with <code>/etc/hosts.allow</code> provides a simple access control mechanism for network services s...Rule Medium Severity -
Verify Group Ownership of /etc/hosts.allow
To properly set the group owner of/etc/hosts.allow
, run the command:$ sudo chgrp root /etc/hosts.allow
Rule Medium Severity -
Verify Group Ownership of /etc/hosts.deny
To properly set the group owner of/etc/hosts.deny
, run the command:$ sudo chgrp root /etc/hosts.deny
Rule Medium Severity -
Verify Ownership of /etc/hosts.allow
To properly set the owner of/etc/hosts.allow
, run the command:$ sudo chown root /etc/hosts.allow
Rule Medium Severity -
Verify Ownership of /etc/hosts.deny
To properly set the owner of/etc/hosts.deny
, run the command:$ sudo chown root /etc/hosts.deny
Rule Medium Severity -
Verify Permissions on /etc/hosts.allow
To properly set the permissions of/etc/hosts.allow
, run the command:$ sudo chmod 0644 /etc/hosts.allow
Rule Medium Severity -
Verify Permissions on /etc/hosts.deny
To properly set the permissions of/etc/hosts.deny
, run the command:$ sudo chmod 0644 /etc/hosts.deny
Rule Medium Severity -
NIS
The Network Information Service (NIS), also known as 'Yellow Pages' (YP), and its successor NIS+ have been made obsolete by Kerberos, LDAP, and oth...Group -
Remove NIS Client
The Network Information Service (NIS), formerly known as Yellow Pages, is a client-server directory service protocol used to distribute system conf...Rule Unknown Severity -
Uninstall ypserv Package
Theypserv
package can be removed with the following command:$ sudo yum erase ypserv
Rule High Severity -
Disable ypbind Service
The <code>ypbind</code> service, which allows the system to act as a client in a NIS or NIS+ domain, should be disabled. The <code>ypbind</code> s...Rule Medium Severity -
Rlogin, Rsh, and Rexec
The Berkeley r-commands are legacy services which allow cleartext remote access and have an insecure trust model.Group -
Uninstall rsh-server Package
Thersh-server
package can be removed with the following command:$ sudo yum erase rsh-server
Rule High Severity -
Uninstall rsh Package
Thersh
package contains the client commands for the rsh servicesRule Unknown Severity -
Disable rexec Service
The <code>rexec</code> service, which is available with the <code>rsh-server</code> package and runs as a service through xinetd or separately as a...Rule High Severity -
Disable rlogin Service
The <code>rlogin</code> service, which is available with the <code>rsh-server</code> package and runs as a service through xinetd or separately as ...Rule High Severity -
Disable rsh Service
The <code>rsh</code> service, which is available with the <code>rsh-server</code> package and runs as a service through xinetd or separately as a s...Rule High Severity -
Remove Host-Based Authentication Files
The <code>shosts.equiv</code> file lists remote hosts and users that are trusted by the local system. To remove these files, run the following comm...Rule High Severity -
Remove Rsh Trust Files
The files <code>/etc/hosts.equiv</code> and <code>~/.rhosts</code> (in each user's home directory) list remote hosts and users that are trusted by ...Rule High Severity -
Remove User Host-Based Authentication Files
The <code>~/.shosts</code> (in each user's home directory) files list remote hosts and users that are trusted by the local system. To remove these ...Rule High Severity
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