> Source: [sk183561](https://support.checkpoint.com/results/sk/sk183561)

# sk183561 - HTTPS Inspection issue with HTTP/2 traffic causes connection reset (GOAWAY frame sent after WINDOW_UPDATE)

| Property | Value |
|----------|-------|
| Solution ID | sk183561 |
| Date Created | 2025-06-18 |
| Last Modified | 2025-06-20 |
| Technical Level | General |
| Products | Security Gateway |
| Versions | R82, R81.20, R81.10 (EOS) |

## Symptoms

- * Intermittent connection drops when HTTPS Inspection is enabled.
* Websites may fail to load completely or require multiple refreshes.
* File downloads/uploads may fail or timeout.
* Kernel debug messages:
  * `ws_http2_handle_frames_on_closed_streams: [WARNING]: stream doesn't exist `
  * `skip frame and send GOAWAY`
  * `Mux implementation logs referencing GOAWAY handling and WINDOW_UPDATE.`

## Cause

In HTTP/2, multiple streams share the same TCP connection. When one stream is closed, both client and server should stop transmitting frames for that stream. However, if a `WINDOW_UPDATE` frame is received after a stream has already been closed, the Security Gateway sends a `GOAWAY` frame. This prematurely terminates the entire connection, affecting all active streams and disrupting the traffic.

## Solution

[Contact Check Point Support](https://www.checkpoint.com/support-services/contact-support/) to get a Hotfix for this issue.

A Support Engineer will make sure the Hotfix is compatible with your environment before providing it.  
For faster resolution and verification, collect these files:

1. [CPinfo](https://support.checkpoint.com/results/sk/sk92739) file from the Management Server involved in the case.
2. [CPinfo](https://support.checkpoint.com/results/sk/sk92739) file from the Security Gateway / each Cluster Member involved in the case.

**Hotfix installation instructions:**   
Refer to [sk168597 - How to install a Hotfix](https://support.checkpoint.com/results/sk/sk168597).

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