diff --git a/.env.common b/.env.common
index 6554fd7..77cc33d 100644
--- a/.env.common
+++ b/.env.common
@@ -16,7 +16,7 @@ REDIS_VERSION=7.2.0-v6
 MINIO_VERSION=RELEASE.2024-01-16T16-07-38Z
 
 EXTERNAL_LISTEN_HOST="127.0.0.1"
-#EXTERNAL_LISTEN_HOSTS="192.168.1.2
+#EXTERNAL_LISTEN_HOSTS="192.168.1.2"
 
 ANY_SYNC_NODE_1_HOST=any-sync-node-1
 ANY_SYNC_NODE_1_PORT=1001
diff --git a/docker-generateconfig/setListenIp.py b/docker-generateconfig/setListenIp.py
index 3f1fc84..d973a9a 100755
--- a/docker-generateconfig/setListenIp.py
+++ b/docker-generateconfig/setListenIp.py
@@ -27,9 +27,16 @@
 
 inputYamlFile = sys.argv[1]
 outputYamlFile = sys.argv[2]
-listenHosts = envVars['EXTERNAL_LISTEN_HOSTS'].split()
-if 'EXTERNAL_LISTEN_HOST' in envVars:
-    listenHosts.append(envVars['EXTERNAL_LISTEN_HOST'])
+externalListenHosts = envVars.get('EXTERNAL_LISTEN_HOSTS', '127.0.0.1').split()
+externalListenHost = envVars.get('EXTERNAL_LISTEN_HOST', None)
+print(f"DEBUG: externalListenHosts={externalListenHosts}")
+print(f"DEBUG: externalListenHost={externalListenHost}")
+listenHosts = list()
+for externalListenHost in externalListenHosts:
+    if externalListenHost not in listenHosts:
+        listenHosts.append(externalListenHost)
+if externalListenHost not in listenHosts:
+    listenHosts.append(externalListenHost)
 
 print(f"DEBUG: listenHosts={listenHosts}")
 
@@ -49,6 +56,9 @@
         # add "quic" listen address
         for name,value in envVars.items():
             if re.match(r"^(ANY_SYNC_.*_PORT)$", name) and value == listenPort:
+                if re.match(r"^(ANY_SYNC_.*_QUIC_PORT)$", name):
+                    # skip port, if PORT == QUIC_PORT
+                    continue
                 quicPortKey = name.replace('_PORT', '_QUIC_PORT')
                 quicPortValue = envVars[quicPortKey]
                 quicListenAddress = 'quic://'+ nodeListenHost +':'+ str(quicPortValue)