diff --git a/pillar/role/monitoring/prometheus-exporter-blackbox.sls b/pillar/role/monitoring/prometheus-exporter-blackbox.sls
index 59b9945..3e9ab08 100644
--- a/pillar/role/monitoring/prometheus-exporter-blackbox.sls
+++ b/pillar/role/monitoring/prometheus-exporter-blackbox.sls
@@ -39,3 +39,12 @@ prometheus:
                 - expect: "^:[^ ]+ 001"
             icmp:
               prober: icmp
+
+firewalld:
+  zones:
+    internal:
+      ports:
+        - comment: 'Prometheus Blackbox Exporter'
+          port: 9115
+          protocol: tcp
+
diff --git a/pillar/role/monitoring/prometheus.sls b/pillar/role/monitoring/prometheus.sls
index 6cd2235..c9c2b01 100644
--- a/pillar/role/monitoring/prometheus.sls
+++ b/pillar/role/monitoring/prometheus.sls
@@ -9,3 +9,9 @@ prometheus:
           global:
             scrape_interval: 15s
             evaluation_interval: 1m
+
+firewalld:
+  zones:
+    internal:
+      services:
+        - prometheus