The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.
#!/bin/bash
# Reconstructed from oval:mil.disa.stig.rhel9os:def:257951
# RHEL 9 must be configured to prevent unrestricted mail relaying.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.
# /etc/postfix/main.cf: smtpd_client_restrictions = permit_mynetworks,reject
# textfilecontent54_object (textfilecontent54_test)
test_1() {
grep -Pq '^smtpd_client_restrictions[ \t]*=[ \t]*permit_mynetworks[, \t]+reject[ \t]*$' '/etc/postfix/main.cf' &>/dev/null
}
if test_1; then
echo "PASS"
else
echo "FAIL"
fi Assessment Script Powered by AISandbox-executed
A standalone Shell script to assess this control automatically. Review before running it in your environment.
Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.
#!/bin/sh
# OVAL Definition: oval:mil.disa.stig.rhel9os:def:257951
if [ ! -f "/etc/postfix/main.cf" ]; then
echo "PASS"
exit 0
fi
grep -q "^smtpd_client_restrictions[ \\t]*=[ \\t]*permit_mynetworks[, \\t]+reject[ \\t]*$" /etc/postfix/main.cf || echo "FAIL"
exit 0