diff --git a/docs/02.Tutorials/2.6.Websocket.md b/docs/02.Tutorials/2.6.Websocket.md
index 28ab9c7ceb..8622d1f73b 100644
--- a/docs/02.Tutorials/2.6.Websocket.md
+++ b/docs/02.Tutorials/2.6.Websocket.md
@@ -42,6 +42,9 @@ filters:
   pools:
   - servers:
     - url: ws://127.0.0.1:12345
+      # keepHost: true, the `Host` will be the same as the original request
+      # If the backend is a load balancer, it would prove to be highly beneficial
+      keepHost: true
     - url: ws://127.0.0.1:9095
     - url: ws://127.0.0.1:9096
     - url: ws://127.0.0.1:9097
diff --git a/docs/07.Reference/7.02.Filters.md b/docs/07.Reference/7.02.Filters.md
index 476db4246d..b8620cb552 100644
--- a/docs/07.Reference/7.02.Filters.md
+++ b/docs/07.Reference/7.02.Filters.md
@@ -359,6 +359,9 @@ name: proxy-example-1
 pools:
 - servers:
   - url: ws://127.0.0.1:9095
+    # keepHost: true, the `Host` will be the same as the original request
+    # If the backend is a load balancer, it would prove to be highly beneficial
+    keepHost: true
   - url: ws://127.0.0.1:9096
   - url: ws://127.0.0.1:9097
   loadBalance:
@@ -2165,4 +2168,4 @@ template: |
 | Name | Type | Description | Required |
 |------|------|-------------|----------|
 | header | [httpheader.AdaptSpec](#httpheaderAdaptSpec) | Rules to revise request header    | No       |
-| body   | string   | If provided the body of the original request is replaced by the value of this option. | No       |
\ No newline at end of file
+| body   | string   | If provided the body of the original request is replaced by the value of this option. | No       |
diff --git a/pkg/filters/proxies/httpproxy/wspool.go b/pkg/filters/proxies/httpproxy/wspool.go
index 24f02bd7df..2e65ee5113 100644
--- a/pkg/filters/proxies/httpproxy/wspool.go
+++ b/pkg/filters/proxies/httpproxy/wspool.go
@@ -123,6 +123,12 @@ func (sp *WebSocketServerPool) dialServer(svr *Server, req *httpprot.Request) (*
 		CompressionMode: websocket.CompressionDisabled,
 	}
 
+	// only set host when server address is not host name OR
+	// server is explicitly told to keep the host of the request.
+	if !svr.AddrIsHostName || svr.KeepHost {
+		opts.Host = req.Host()
+	}
+
 	opts.HTTPHeader.Del("Sec-WebSocket-Origin")
 	opts.HTTPHeader.Del("Sec-WebSocket-Protocol")
 	opts.HTTPHeader.Del("Sec-WebSocket-Accept")