Guide to the Secure Configuration of Fedora
Rules, Groups, and Values defined within the XCCDF Benchmark
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X Window System
The X Window System implementation included with the system is called X.org.Group -
Specify UID and GID for Anonymous NFS Connections
To specify the UID and GID for remote root users, edit the <code>/etc/exports</code> file and add the following for each export: <pre> anonuid=<cod...Rule Unknown Severity -
Mount Remote Filesystems with Restrictive Options
Edit the file <code>/etc/fstab</code>. For each filesystem whose type (column 3) is <code>nfs</code> or <code>nfs4</code>, add the text <code>,node...Group -
Configure NFS Servers
The steps in this section are appropriate for systems which operate as NFS servers.Group -
Ensure All-Squashing Disabled On All Exports
The <code>all_squash</code> maps all uids and gids to an anonymous user. This should be disabled by removing any instances of the <code>all_squash<...Rule Low Severity -
Ensure Insecure File Locking is Not Allowed
By default the NFS server requires secure file-lock requests, which require credentials from the client in order to lock a file. Most NFS clients s...Rule Medium Severity -
Restrict NFS Clients to Privileged Ports
By default, the server NFS implementation requires that all client requests be made from ports less than 1024. If your organization has control ove...Rule Unknown Severity -
Use Root-Squashing on All Exports
If a filesystem is exported using root squashing, requests from root on the client are considered to be unprivileged (mapped to a user such as nobo...Rule Unknown Severity -
Configure the Exports File Restrictively
Linux's NFS implementation uses the file <code>/etc/exports</code> to control what filesystems and directories may be accessed via NFS. (See the <c...Group -
Export Filesystems Read-Only if Possible
If a filesystem is being exported so that users can view the files in a convenient fashion, but there is no need for users to edit those files, exp...Group
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