> Source: [sk183214](https://support.checkpoint.com/results/sk/sk183214)

# sk183214 - File upload fails to an HTTP/2 web site behind Security Gateway

| Property | Value |
|----------|-------|
| Solution ID | sk183214 |
| Date Created | 2025-03-07 |
| Last Modified | 2025-09-29 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82, R81.20, R81.10 (EOS) |
| OS | Gaia |

## Symptoms

- * Upload fails after several seconds from the start for some files (in some cases, file size is greater than 25KB) over an HTTPS connection.

* The upload is performed from the Internet to an HTTP/2 web server behind the Check Point Security Gateway with enabled HTTP/2 inspection ([sk116022](https://support.checkpoint.com/results/sk/sk116022)).

* The upload does not fail when HTTP/2 inspection is disabled on the Security Gateway.

* Issue occurs regardless of whether the line "`strict_hold_enable=1`" exists in the `$FWDIR/conf/malware_config` file on the Security Gateway (see [sk183840](https://support.checkpoint.com/results/sk/sk183840)).

## Cause

During the inspection of HTTP/2 traffic, the Security Gateway manages multiple streams within the same connection.

In the reported case:

1. The kernel debug on the Security Gateway showed that a specific stream was closed by both sides and then the Security Gateway received a "WINDOW_UPDATE" frame for that closed stream.
2. The Security Gateway then sends a "GOAWAY" frame (as described in RFC7540 and RFC9113) that results in closing the entire connection, affecting all the streams of that connection.

## Solution

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