STIGQter: STIG Summary: Anduril NixOS Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Oct 2025:

NixOS must authenticate the remote logging server for off-loading audit logs.

DISA Rule

SV-268109r1131023_rule

Vulnerability Number

V-268109

Group Title

SRG-OS-000051-GPOS-00024

Rule Version

ANIX-00-000490

Severity

CAT II

CCI(s)

• CCI-000154 - Provide the capability to centrally review and analyze audit records from multiple components within the system.
• CCI-001851 - Transfer audit logs per organization-defined frequency to a different system, system component, or media than the system or system component conducting the logging.

Weight

10

Fix Recommendation

Configure the operating system to authenticate the remote logging server for off-loading audit logs.

Add the following Nix code to the NixOS Configuration, usually located in /etc/nixos/configuration.nix or /etc/nixos/flake.nix:

destination d_network {
syslog(
"<remote-logging-server>" port(<port>)
transport(tls)
tls(
cert-file("/var/syslog-ng/certs.d/certificate.crt")
key-file("/var/syslog-ng/certs.d/certificate.key")
ca-file("/var/syslog-ng/certs.d/cert-bundle.crt")
peer-verify(yes)
)
);
};

log { source(s_local); destination(d_local); destination(d_network); };

For example, an updated configuration of 'services.rsyslogd.extraConfig' would look like the following in /etc/nixos/configuration.nix ('...' denoting that the 'services.rsyslogd.extraConfig' configuration may have other options configured):

services.rsyslogd.extraConfig = ''
...
destination d_network {
syslog(
"<remote-logging-server>" port(<port>)
transport(tls)
tls(
cert-file("/var/syslog-ng/certs.d/certificate.crt")
key-file("/var/syslog-ng/certs.d/certificate.key")
ca-file("/var/syslog-ng/certs.d/cert-bundle.crt")
peer-verify(yes)
)
);
};

log { source(s_local); destination(d_local); destination(d_network); };
...
'';

Rebuild and switch to the new NixOS configuration:
$ sudo nixos-rebuild switch

Check Contents

Verify the operating system authenticates the remote logging server for off-loading audit logs.

List the configured destinations with the following command:

$ grep -i "TrustedCertificateFile" /etc/systemd/journal-upload.conf"

If no TrustedCertificateFile is configured or is set to "all", this is a finding.

Vulnerability Number

V-268109

Documentable

False

Rule Version

ANIX-00-000490

Severity Override Guidance

Verify the operating system authenticates the remote logging server for off-loading audit logs.

List the configured destinations with the following command:

$ grep -i "TrustedCertificateFile" /etc/systemd/journal-upload.conf"

If no TrustedCertificateFile is configured or is set to "all", this is a finding.

Check Content Reference

M

Target Key

5658