diff --git a/install/usr/share/swarmlab.io/sec/swarmlab-sec b/install/usr/share/swarmlab.io/sec/swarmlab-sec
index 5acc431..5752c45 100755
--- a/install/usr/share/swarmlab.io/sec/swarmlab-sec
+++ b/install/usr/share/swarmlab.io/sec/swarmlab-sec
@@ -116,6 +116,20 @@ DIR="$( cd -P "$( dirname "$SOURCE" )" >/dev/null 2>&1 && pwd )"
 # ----------------------------------------------
 
 
+
+function EPHEMERAL_PORT() {
+    LOW_BOUND=49152
+    RANGE=16384
+    while true; do
+        CANDIDATE=$[$LOW_BOUND + ($RANDOM % $RANGE)]
+        (echo "" >/dev/tcp/127.0.0.1/${CANDIDATE}) >/dev/null 2>&1
+        if [ $? -ne 0 ]; then
+            echo $CANDIDATE
+            break
+        fi
+    done
+}
+
 Wdir=$(pwd)
 
 if [ ! -f $Wdir/.env ]; then
@@ -124,6 +138,14 @@ REGISTRY_ADDR=localhost
 REGISTRY_PORT=5000
 IMAGE_NAME=$HYBRID_NETWORK
 SSH_PORT=
+WEB_PORT=$(EPHEMERAL_PORT)
+WEB_PORT1=$(EPHEMERAL_PORT)
+WEB_PORT2=$(EPHEMERAL_PORT)
+R_PORT1=$(EPHEMERAL_PORT)
+R_PORT2=$(EPHEMERAL_PORT)
+R_PORT3=$(EPHEMERAL_PORT)
+R_PORT4=$(EPHEMERAL_PORT)
+R_PORT5=$(EPHEMERAL_PORT)
 EOF
 fi
 
@@ -378,6 +400,7 @@ services:
     user: root
     entrypoint: ["sec_bootstrap", "role=master", "sec_master_service_name=master", "sec_worker_service_name=worker"]
     ports:
+      - "\${R_PORT1}:3787"
       - "\${SSH_PORT}:22"
     networks:
       - ${HYBRID_NETWORK}