Guide to the Secure Configuration of Debian 12
Rules, Groups, and Values defined within the XCCDF Benchmark
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FTP Server
FTP is a common method for allowing remote access to files. Like telnet, the FTP protocol is unencrypted, which means that passwords and other data...Group -
Configure Firewalls to Protect the FTP Server
By default, <code>iptables</code> blocks access to the ports used by the web server. To configure <code>iptables</code> to allow port 21 traffic, ...Rule Unknown Severity -
Mail Server Software
Mail servers are used to send and receive email over the network. Mail is a very common service, and Mail Transfer Agents (MTAs) are obvious target...Group -
Uninstall Sendmail Package
Sendmail is not the default mail transfer agent and is not installed by default. The <code>sendmail</code> package can be removed with the followin...Rule Medium Severity -
Disable Postfix Network Listening
Edit the file <code>/etc/postfix/main.cf</code> to ensure that only the following <code>inet_interfaces</code> line appears: <pre>inet_interfaces =...Rule Medium Severity -
Enable the NTP Daemon
Thentp
service can be enabled with the following command:$ sudo systemctl enable ntp.service
Rule High Severity -
A remote time server for Chrony is configured
<code>Chrony</code> is a daemon which implements the Network Time Protocol (NTP). It is designed to synchronize system clocks across a variety of s...Rule Medium Severity -
Chrony Configure Pool and Server
<code>Chrony</code> is a daemon which implements the Network Time Protocol (NTP). It is designed to synchronize system clocks across a variety of s...Rule Medium Severity -
Verify Group Who Owns /etc/chrony.keys File
To properly set the group owner of/etc/chrony.keys
, run the command:$ sudo chgrp root /etc/chrony.keys
Rule Medium Severity -
Verify User Who Owns /etc/chrony.keys File
To properly set the owner of/etc/chrony.keys
, run the command:$ sudo chown root /etc/chrony.keys
Rule Medium Severity
Node 2
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Modules