diff --git a/cluster/nginx/nginx.conf b/cluster/nginx/nginx.conf
index af059a7..ab905c3 100644
--- a/cluster/nginx/nginx.conf
+++ b/cluster/nginx/nginx.conf
@@ -5,9 +5,9 @@ stream {
         server 172.60.0.10:5222;
         server 172.60.0.20:5222;
         server 172.60.0.30:5222;
-        fd23:d79:d076::10:5222;
-        fd23:d79:d076::20:5222;
-        fd23:d79:d076::30:5222;
+        server [fd23:d79:d076::10]:5222;
+        server [fd23:d79:d076::20]:5222;
+        server [fd23:d79:d076::30]:5222;
     }
     server {
         listen 55222;
@@ -21,9 +21,9 @@ stream {
         server 172.60.0.10:7070;
         server 172.60.0.20:7070;
         server 172.60.0.30:7070;
-        fd23:d79:d076::10:7070;
-        fd23:d79:d076::20:7070;
-        fd23:d79:d076::30:7070;
+        server [fd23:d79:d076::10]:7070;
+        server [fd23:d79:d076::20]:7070;
+        server [fd23:d79:d076::30]:7070;
     }
     server {
         listen 57070;
@@ -37,9 +37,9 @@ stream {
         server 172.60.0.10:7443;
         server 172.60.0.20:7443;
         server 172.60.0.30:7443;
-        fd23:d79:d076::10:7443;
-        fd23:d79:d076::20:7443;
-        fd23:d79:d076::30:7443;
+        server [fd23:d79:d076::10]:7443;
+        server [fd23:d79:d076::20]:7443;
+        server [fd23:d79:d076::30]:7443;
     }
     server {
         listen 57443;
@@ -53,9 +53,9 @@ stream {
         server 172.60.0.10:5269;
         server 172.60.0.20:5269;
         server 172.60.0.30:5269;
-        fd23:d79:d076::10:5269;
-        fd23:d79:d076::20:5269;
-        fd23:d79:d076::30:5269;
+        server [fd23:d79:d076::10]:5269;
+        server [fd23:d79:d076::20]:5269;
+        server [fd23:d79:d076::30]:5269;
     }
     server {
         listen 5269;
@@ -69,9 +69,9 @@ stream {
         server 172.60.0.10:5270;
         server 172.60.0.20:5270;
         server 172.60.0.30:5270;
-        fd23:d79:d076::10:5270;
-        fd23:d79:d076::20:5270;
-        fd23:d79:d076::30:5270;
+        server [fd23:d79:d076::10]:5270;
+        server [fd23:d79:d076::20]:5270;
+        server [fd23:d79:d076::30]:5270;
     }
     server {
         listen 5270;
diff --git a/cluster_with_federation/nginx/nginx.conf b/cluster_with_federation/nginx/nginx.conf
index 8ce1cdc..f832b9d 100644
--- a/cluster_with_federation/nginx/nginx.conf
+++ b/cluster_with_federation/nginx/nginx.conf
@@ -5,9 +5,9 @@ stream {
         server 172.60.0.10:5222;
         server 172.60.0.20:5222;
         server 172.60.0.30:5222;
-        fd23:d79:d076::10:5222;
-        fd23:d79:d076::20:5222;
-        fd23:d79:d076::30:5222;
+        server [fd23:d79:d076::10]:5222;
+        server [fd23:d79:d076::20]:5222;
+        server [fd23:d79:d076::30]:5222;
     }
     server {
         listen 55222;
@@ -21,9 +21,9 @@ stream {
         server 172.60.0.10:7070;
         server 172.60.0.20:7070;
         server 172.60.0.30:7070;
-        fd23:d79:d076::10:7070;
-        fd23:d79:d076::20:7070;
-        fd23:d79:d076::30:7070;
+        server [fd23:d79:d076::10]:7070;
+        server [fd23:d79:d076::20]:7070;
+        server [fd23:d79:d076::30]:7070;
     }
     server {
         listen 57070;
@@ -37,9 +37,9 @@ stream {
         server 172.60.0.10:7443;
         server 172.60.0.20:7443;
         server 172.60.0.30:7443;
-        fd23:d79:d076::10:7443;
-        fd23:d79:d076::20:7443;
-        fd23:d79:d076::30:7443;
+        server [fd23:d79:d076::10]:7443;
+        server [fd23:d79:d076::20]:7443;
+        server [fd23:d79:d076::30]:7443;
     }
     server {
         listen 57443;
@@ -53,9 +53,9 @@ stream {
         server 172.60.0.10:5269;
         server 172.60.0.20:5269;
         server 172.60.0.30:5269;
-        fd23:d79:d076::10:5269;
-        fd23:d79:d076::20:5269;
-        fd23:d79:d076::30:5269;
+        server [fd23:d79:d076::10]:5269;
+        server [fd23:d79:d076::20]:5269;
+        server [fd23:d79:d076::30]:5269;
     }
     server {
         listen 5269;
@@ -69,9 +69,9 @@ stream {
         server 172.60.0.10:5270;
         server 172.60.0.20:5270;
         server 172.60.0.30:5270;
-        fd23:d79:d076::10:5270;
-        fd23:d79:d076::20:5270;
-        fd23:d79:d076::30:5270;
+        server [fd23:d79:d076::10]:5270;
+        server [fd23:d79:d076::20]:5270;
+        server [fd23:d79:d076::30]:5270;
     }
     server {
         listen 5270;
diff --git a/proxy/nginx/nginx.conf b/proxy/nginx/nginx.conf
index 5fe7e1c..9c48fc4 100644
--- a/proxy/nginx/nginx.conf
+++ b/proxy/nginx/nginx.conf
@@ -3,7 +3,7 @@
 stream {
     upstream xmpp {
         server 172.60.0.10:5222;
-        fd23:d79:d076::10:5222;
+        server [fd23:d79:d076::10]:5222;
     }
     server {
         listen 55222;
@@ -15,7 +15,7 @@ stream {
 
     upstream bosh {
         server 172.60.0.10:7070;
-        fd23:d79:d076::10:7070;
+        server [fd23:d79:d076::10]:7070;
     }
     server {
         listen 57070;
@@ -27,7 +27,7 @@ stream {
 
     upstream boshs {
         server 172.60.0.10:7443;
-        fd23:d79:d076::10:7443;
+        server [fd23:d79:d076::10]:7443;
     }
     server {
         listen 57443;
@@ -39,7 +39,7 @@ stream {
 
     upstream s2s {
         server 172.60.0.10:5269;
-        fd23:d79:d076::10:5269;
+        server [fd23:d79:d076::10]:5269;
     }
     server {
         listen 55269;
@@ -51,7 +51,7 @@ stream {
 
     upstream s2slegacy {
         server 172.60.0.10:5270;
-        fd23:d79:d076::10:5270;
+        server [fd23:d79:d076::10]:5270;
     }
     server {
         listen 55270;