diff --git a/mkdocs/blog/posts/nvidia-dynamo.md b/mkdocs/blog/posts/nvidia-dynamo.md
index 1d2e63d66..58da5c346 100644
--- a/mkdocs/blog/posts/nvidia-dynamo.md
+++ b/mkdocs/blog/posts/nvidia-dynamo.md
@@ -94,10 +94,10 @@ replicas:
       - export NATS_SERVER="nats://$DSTACK_ROUTER_INTERNAL_IP:4222"
       # Set to enable /health endpoint required by dstack probes.
       - export DYN_SYSTEM_PORT="8000"
-      # Wait until the router's etcd and NATS ports are actually accepting connections.
+      # Wait until the router's etcd and NATS are healthy.
       - |
-        until (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/2379) 2>/dev/null \
-           && (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/4222) 2>/dev/null; do
+        until curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:2379/health" \
+           && curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:8222/healthz"; do
           echo "waiting for etcd/NATS on $DSTACK_ROUTER_INTERNAL_IP..."; sleep 3
         done
       - pip install "ai-dynamo[sglang]==1.1.1"
@@ -121,8 +121,8 @@ replicas:
       - export NATS_SERVER="nats://$DSTACK_ROUTER_INTERNAL_IP:4222"
       - export DYN_SYSTEM_PORT="8000"
       - |
-        until (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/2379) 2>/dev/null \
-           && (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/4222) 2>/dev/null; do
+        until curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:2379/health" \
+           && curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:8222/healthz"; do
           echo "waiting for etcd/NATS on $DSTACK_ROUTER_INTERNAL_IP..."; sleep 3
         done
       - pip install "ai-dynamo[sglang]==1.1.1"
diff --git a/mkdocs/docs/concepts/services.md b/mkdocs/docs/concepts/services.md
index f9f260408..0f404c4cf 100644
--- a/mkdocs/docs/concepts/services.md
+++ b/mkdocs/docs/concepts/services.md
@@ -489,10 +489,10 @@ Below is an example for running `zai-org/GLM-4.5-Air-FP8` on `H200`:
           - export NATS_SERVER="nats://$DSTACK_ROUTER_INTERNAL_IP:4222"
           # Set to enable /health endpoint required by dstack probes.
           - export DYN_SYSTEM_PORT="8000"
-          # Wait until the router's etcd and NATS ports are actually accepting connections.
+          # Wait until the router's etcd and NATS are healthy.
           - |
-            until (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/2379) 2>/dev/null \
-               && (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/4222) 2>/dev/null; do
+            until curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:2379/health" \
+               && curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:8222/healthz"; do
               echo "waiting for etcd/NATS on $DSTACK_ROUTER_INTERNAL_IP..."; sleep 3
             done
           - pip install "ai-dynamo[sglang]==1.1.1"
@@ -516,8 +516,8 @@ Below is an example for running `zai-org/GLM-4.5-Air-FP8` on `H200`:
           - export NATS_SERVER="nats://$DSTACK_ROUTER_INTERNAL_IP:4222"
           - export DYN_SYSTEM_PORT="8000"
           - |
-            until (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/2379) 2>/dev/null \
-               && (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/4222) 2>/dev/null; do
+            until curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:2379/health" \
+               && curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:8222/healthz"; do
               echo "waiting for etcd/NATS on $DSTACK_ROUTER_INTERNAL_IP..."; sleep 3
             done
           - pip install "ai-dynamo[sglang]==1.1.1"
diff --git a/mkdocs/docs/examples/inference/dynamo.md b/mkdocs/docs/examples/inference/dynamo.md
index b73cc809f..5c9fecc23 100644
--- a/mkdocs/docs/examples/inference/dynamo.md
+++ b/mkdocs/docs/examples/inference/dynamo.md
@@ -60,10 +60,10 @@ groups:
       - export NATS_SERVER="nats://$DSTACK_ROUTER_INTERNAL_IP:4222"
       # Set to enable /health endpoint required by dstack probes.
       - export DYN_SYSTEM_PORT="8000"
-      # Wait until the router's etcd and NATS ports are actually accepting connections.
+      # Wait until the router's etcd and NATS are healthy.
       - |
-        until (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/2379) 2>/dev/null \
-           && (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/4222) 2>/dev/null; do
+        until curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:2379/health" \
+           && curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:8222/healthz"; do
           echo "waiting for etcd/NATS on $DSTACK_ROUTER_INTERNAL_IP..."; sleep 3
         done
       - pip install "ai-dynamo[sglang]==1.1.1"
@@ -87,8 +87,8 @@ groups:
       - export NATS_SERVER="nats://$DSTACK_ROUTER_INTERNAL_IP:4222"
       - export DYN_SYSTEM_PORT="8000"
       - |
-        until (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/2379) 2>/dev/null \
-           && (echo > /dev/tcp/$DSTACK_ROUTER_INTERNAL_IP/4222) 2>/dev/null; do
+        until curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:2379/health" \
+           && curl -fsS "http://$DSTACK_ROUTER_INTERNAL_IP:8222/healthz"; do
           echo "waiting for etcd/NATS on $DSTACK_ROUTER_INTERNAL_IP..."; sleep 3
         done
       - pip install "ai-dynamo[sglang]==1.1.1"