Guide to the Secure Configuration of Alibaba Cloud Linux 3
Rules, Groups, and Values defined within the XCCDF Benchmark
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Disable Avahi Server if Possible
Because the Avahi daemon service keeps an open network port, it is subject to network attacks. Disabling it can reduce the system's vulnerability to such attacks.Group -
Disable Avahi Server Software
Theavahi-daemon
service can be disabled with the following command:$ sudo systemctl mask --now avahi-daemon.service
Rule Medium Severity -
Base Services
This section addresses the base services that are installed on a Alibaba Cloud Linux 3 default installation which are not covered in other sections. Some of these services listen on the network and...Group -
Disable ntpdate Service (ntpdate)
The <code>ntpdate</code> service sets the local hardware clock by polling NTP servers when the system boots. It synchronizes to the NTP servers listed in <code>/etc/ntp/step-tickers</code> or <code...Rule Low Severity -
Disable Odd Job Daemon (oddjobd)
The <code>oddjobd</code> service exists to provide an interface and access control mechanism through which specified privileged tasks can run tasks for unprivileged client applications. Communicati...Rule Medium Severity -
Disable Apache Qpid (qpidd)
The <code>qpidd</code> service provides high speed, secure, guaranteed delivery services. It is an implementation of the Advanced Message Queuing Protocol. By default the qpidd service will bind ...Rule Low Severity -
Disable Network Router Discovery Daemon (rdisc)
The <code>rdisc</code> service implements the client side of the ICMP Internet Router Discovery Protocol (IRDP), which allows discovery of routers on the local subnet. If a router is discovered the...Rule Medium Severity -
Cron and At Daemons
The cron and at services are used to allow commands to be executed at a later time. The cron service is required by almost all systems to perform necessary maintenance tasks, while at may or may no...Group -
Install the cron service
The Cron service should be installed.Rule Medium Severity -
Enable cron Service
The <code>crond</code> service is used to execute commands at preconfigured times. It is required by almost all systems to perform necessary maintenance tasks, such as notifying root of system acti...Rule Medium Severity
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