> Source: [sk111741](https://support.checkpoint.com/results/sk/sk111741)

# sk111741 - "Error 324 (net::ERR_EMPTY_RESPONSE)" in web browser when accessing a web server through Security Gateway in Non-Transparent Proxy mode without next proxy

| Property | Value |
|----------|-------|
| Solution ID | sk111741 |
| Date Created | 2016-05-30 |
| Last Modified | 2019-09-04 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20 |

## Symptoms

- * "`Error 324 (net::ERR_EMPTY_RESPONSE): The server closed the connection without sending any data`" in web browser when accessing a web server through Security Gateway in Non-Transparent Proxy mode without next proxy.

* Smart View Tracker log shows:

  * Type = `Log`
  * Product = `Security Gateway/Management`
  * Action = `Reject`
  * Reason = `Proxy: Internal error; Connection was rejected due to internal error`
  * Service = `HTTP_and_HTTPS_proxy (8080)`

  *Example* :  
  [![](https://sc1.checkpoint.com/sc/SolutionsStatics/sk111741/Example.png)](https://sc1.checkpoint.com/sc/SolutionsStatics/sk111741/Example.png "Click the image to see it in full size in a new tab/window")
* Kernel debug ('`fw ctl debug -m WS + connection session`') on Security Gateway shows:

  `
  ... ...`  
  `
  ws_http_session_server_read: side WS_SERVER_SIDE,`**Old state:<header read> -> New state:<header read>** `;`  
  `
  ... ...`  
  `
  ws_connection_event_handler: received a FIN from the server side, checking for pending data;`  
  `
  ... ...`  
  `
  ws_connection_can_close_client: server side returned FIN or is not connected, checking for a write session;`  
  `
  ... ...`  
  `
  ws_connection_can_close_client: current_write_session not found, closing the connection;
  `
* Issue also occurs when Proxy mode is disabled and IPS blade with "Header Spoofing" protection is enabled (action "Prevent").

## Cause

Web server sends HTTP response packet with HTTP headers section that contains a single \\r\\n (CR-LF) instead of \\r\\n\\r\\n (CR-LF CR-LF).  
Web Intelligence module does not process this HTTP header. As a result, the HTTP connection is closed without passing the data to the client.

## Solution

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