All remote access methods must be monitored.

From Canonical Ubuntu 16.04 Security Technical Implementation Guide

Part of SRG-OS-000032-GPOS-00013

Associated with: CCI-000067

SV-90543r2_rule All remote access methods must be monitored.

Vulnerability discussion

Remote access services, such as those providing remote access to network devices and information systems, which lack automated monitoring capabilities, increase risk and make remote user access management difficult at best.Remote access is access to DoD nonpublic information systems by an authorized user (or an information system) communicating through an external, non-organization-controlled network. Remote access methods include, for example, dial-up, broadband, and wireless.Automated monitoring of remote access sessions allows organizations to detect cyber attacks and also ensure ongoing compliance with remote access policies by auditing connection activities of remote access capabilities, such as Remote Desktop Protocol (RDP), on a variety of information system components (e.g., servers, workstations, notebook computers, smartphones, and tablets).

Check content

Verify that the Ubuntu operating system monitors all remote access methods. Check that remote access methods are being logged by running the following command: # grep -E '(auth.*|authpriv.*|daemon.*)' /etc/rsyslog.d/50-default.conf auth,authpriv.* /var/log/auth.log daemon.notice /var/log/messages If "auth.*", "authpriv.*" or "daemon.*" are not configured to be logged, this is a finding.

Fix text

Configure the Ubuntu operating system to monitor all remote access methods by adding the following lines to the "/etc/rsyslog.d/50-default.conf" file: auth.*,authpriv.* /var/log/secure daemon.notice /var/log/messages The "rsyslog" service must be restarted for the changes to take effect. To restart the "rsyslog" service, run the following command: # sudo systemctl restart rsyslog.service

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