diff --git a/src/debian/debian_dns_smartdns_cron.conf b/src/debian/debian_dns_smartdns_cron.conf
new file mode 100644
index 0000000..23474b0
--- /dev/null
+++ b/src/debian/debian_dns_smartdns_cron.conf
@@ -0,0 +1,14 @@
+# This configuration file is customized by fox,
+# Optimize SmartDNS crontab for local DNS server.
+
+15 5 * * * /usr/bin/wget -q --tries=10 --retry-connrefused --random-wait https://anti-ad.net/anti-ad-for-smartdns.conf -O /etc/smartdns.d/anti-ad-smartdns.conf
+
+20 5 * * * /usr/bin/systemctl restart smartdns.service
+
+
+## Or when the smartdns plugin is installed
+
+15 5 * * * /usr/bin/wget -q --tries=10 --retry-connrefused --random-wait https://anti-ad.net/anti-ad-for-smartdns.conf -O /etc/smartdns.d/anti-ad-smartdns.conf
+
+20 5 * * * /usr/bin/bash /opt/smartdns_plugin.sh
+