Caddy | HTTP2 Error on Chromium Browsers

[SkeelKat]

Hi everybody.

I am getting an intermittent issue with caddy as reverse proxy that at least once a day when trying to access a site that caddy serves as reverse proxy that Chromium based Browsers (Edge, Chrome and Opera confirmed) gives HTTP2 error.

Firefox works 100% fine

Restarting Caddy makes no difference, bouncing OPNsense completely, and 2min later everything is working as expected.

Disabling HTTP2/3 results in the browser returning HTTP 425 - Too Early response

Anyone else having this issue? Was fine on 25.7 and started after last upgrade to 25.7.4

[Monviech (Cedrik)]

On 25.7 caddy was this version:

https://github.com/opnsense/ports/commit/ead2b8a1026e1767ea973064ddd985afab006cbe

On 25.7.4 it is this version:

https://github.com/opnsense/ports/commit/aa48a16b1aa1cc31234a25fba339f11b3753a30a

So between 2.10.0 and 2.10.2 something must have happened that causes your error.

I would suggest to try their community forum or their github for help:

https://caddy.community/
https://github.com/caddyserver/caddy