diff --git a/_data/rules.yml b/_data/rules.yml
index a655c8b..eb0c86b 100644
--- a/_data/rules.yml
+++ b/_data/rules.yml
@@ -292,3 +292,15 @@ services:
       - name: prometheus/blackbox_exporter
         doc_url: https://github.com/prometheus/blackbox_exporter
         rules:
+          - name: Status Code
+            description: HTTP status code is not 200-299
+            query: 'probe_http_status_code <= 199 AND probe_http_status_code >= 300'
+            severity: error
+          - name: SSL certificate will expire soon
+            description: SSL certificate expires in 30 days
+            query: 'probe_ssl_earliest_cert_expiry - time() < 86400 * 30'
+            severity: warning
+          - name: SSL certificate has expired
+            description: SSL certificate has expired already
+            query: 'probe_ssl_earliest_cert_expiry - time()  <= 0'
+            severity: error