kubernetes/infrastructure/network-policies/monitoring-alloy-syslog.yaml

@@ -1,13 +1,6 @@
-# Targeted carve-out: alloy-syslog needs world ingress on the syslog
-# ports specifically. The Service is ETP=Cluster, so external syslog
-# senders (Proxmox, LXC hosts, network gear) hit the LB IP, get DNAT'd
-# to an alloy pod, and get SNAT'd to the receiving node's cilium_host
-# address. Cilium then sees the source as `world-ipv4` identity (the
-# cilium_host IP isn't a known endpoint), NOT `host` — so the broad
-# monitoring CNP's `fromEntities: host` rule doesn't catch it.
-#
-# Scoped via endpointSelector so this only widens ingress on the
-# alloy-syslog pod, not the whole namespace.
+# Syslog senders reaching the alloy-syslog LB (ETP=Local, client address
+# reaches the pod): network gear on Management, the SLZB coordinators on
+# IoT, and the UDM itself, which sources from its k8s-ingress address.
 apiVersion: cilium.io/v2
 kind: CiliumNetworkPolicy
 metadata:
@@ -19,8 +12,10 @@ spec:
       app.kubernetes.io/instance: alloy-syslog
       app.kubernetes.io/name: alloy
   ingress:
-    - fromEntities:
-        - world
+    - fromCIDRSet:
+        - cidrGroupRef: net-management
+        - cidrGroupRef: net-iot
+        - cidrGroupRef: net-k8s-ingress
       toPorts:
         - ports:
             - port: "514"