> Source: [sk180257](https://support.checkpoint.com/results/sk/sk180257)

# sk180257 - HTTP/2 websites do not work when the Strict Hold feature is enabled on a Security Gateway

| Property | Value |
|----------|-------|
| Solution ID | sk180257 |
| Date Created | 2022-11-09 |
| Last Modified | 2025-09-28 |
| Technical Level | Advanced |
| Products | Security Gateway |
| Versions | R82.10, R82, R81.20, R81.10 (EOS), R81 (EOS) |
| OS | Gaia |

## Symptoms

- * Certain websites that function only on HTTP/2 protocol cannot be accessed.

* The webpage shows the HTTP Error 464.

* The website can be reached when using HTTPS Bypass in the HTTPS Inspection policy.

* Developer Tools in the web browser show that the website is using the HTTP2 protocol:

  `"request": {`  

  `"method": "GET",`  

  `"url": "https://XXXXXX",`  

  `"httpVersion": "http/2.0"`

## Cause

The limitation is with HTTP2 while the Security Gateway uses the Strict Hold mode (see [sk183840](https://support.checkpoint.com/results/sk/sk183840)).

If a website must work with HTTP2, it is not possible, because the Security Gateway forces the traffic to be downgraded to HTTP1.1.

## Solution

This solution requires authentication. Please log in to view the full solution.

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