diff --git a/global/overlay/etc/puppet/cosmos-rules.yaml b/global/overlay/etc/puppet/cosmos-rules.yaml
index c865ba6..f18d6f2 100644
--- a/global/overlay/etc/puppet/cosmos-rules.yaml
+++ b/global/overlay/etc/puppet/cosmos-rules.yaml
@@ -145,3 +145,5 @@ nifrontend-sto1-prod-1.sunet.se:
 
 cisoas-sto4-prod-1.sunet.se:
   net::nftables:
+  sunet::dehydrated::client:
+    domain: cisoas-sto4-prod-1.sunet.se