Resolved Issue with HTTP/3 Activation on WOLTLAB Forum Administration

[Ankebut]

Server operating system version

Ubuntu 22.04.4 LTS

Plesk version and microupdate number

Version 18.0.61 Update #1

When I enable HTTP3, I am unable to access the administration panel of my forum running on the WOLTLAB engine. I always receive the error message "Undefined array key 'HTTP_HOST'".

 

[Ankebut]

The topic is also discussed [here], but it doesn't work for me despite this additional nginx directive.

fastcgi_param HTTP_HOST $host;

 

[Kaspar@Plesk]

Seems to be a know issue with Nginx and PHP.

As a workaround you can try setting the host manual (instead of using a variable) in the Additional nginx directives of the domain.

 

[Ankebut]

fastcgi_param HTTP_HOST industriemeister-forum.de;

It's not working :-(

 

[Kaspar@Plesk]

Is Proxy Mode disabled for the domain?

If so, when you create a new PHP (for example mytest.php) and add the following code to

<pre>
<?php
print_r($_SERVER);
?>

Does it output the HTTP_HOST variable?

 

[Ankebut]

https://industriemeister-forum.de/mytest.php

 

[Ankebut]

Array
(
[USER] => industriemeister-forum.de
[HOME] => /var/www/vhosts/industriemeister-forum.de
[HTTP_COOKIE] => XSRF-TOKEN=7dbd6f6ffa17f402e09ac9178437907e9085634f81cf7ccd3315660b3072edf5-F00mXZ1v%2BFmAs6mprd7w9A%3D%3D; _ga=GA1.1.1969292024.1716140353; wsc_130f30_user_session=a7a9baa7eb43614556ec7e4439a033846d7d10e78513380699a77f03aa87ac2f-AUNonFpRarsrUFEsG5faSdv3D9jZlg%3D%3D; _ga_DHHDR0WJ7H=GS1.1.1716140353.1.1.1716142205.0.0.0
[HTTP_PRIORITY] => u=0, i
[HTTP_ACCEPT_LANGUAGE] => de-DE,de;q=0.9,en;q=0.8,tr;q=0.7,zh-CN;q=0.6,zh;q=0.5
[HTTP_ACCEPT_ENCODING] => gzip, deflate, br, zstd
[HTTP_REFERER] => Plesk Forum
[HTTP_SEC_FETCH_DEST] => document
[HTTP_SEC_FETCH_USER] => ?1
[HTTP_SEC_FETCH_MODE] => navigate
[HTTP_SEC_FETCH_SITE] => cross-site
[HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
[HTTP_USER_AGENT] => Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36
[HTTP_UPGRADE_INSECURE_REQUESTS] => 1
[HTTP_SEC_CH_UA_PLATFORM] => "macOS"
[HTTP_SEC_CH_UA_MOBILE] => ?0
[HTTP_SEC_CH_UA] => "Google Chrome";v="125", "Chromium";v="125", "Not.A/Brand";v="24"
[REDIRECT_STATUS] => 200
[SERVER_NAME] => industriemeister-forum.de
[SERVER_PORT] => 443
[SERVER_ADDR] => 2a01:4f8:162:7103::2
[REMOTE_PORT] => 54760
[REMOTE_ADDR] => 2003:f2:4f35:dd00:1a4:f637:1127:d851
[SERVER_SOFTWARE] => nginx/1.26.0
[GATEWAY_INTERFACE] => CGI/1.1
[HTTPS] => on
[REQUEST_SCHEME] => https
[SERVER_PROTOCOL] => HTTP/3.0
[DOCUMENT_ROOT] => /var/www/vhosts/industriemeister-forum.de/httpdocs
[DOCUMENT_URI] => /mytest.php
[REQUEST_URI] => /mytest.php
[SCRIPT_NAME] => /mytest.php
[CONTENT_LENGTH] =>
[CONTENT_TYPE] =>
[REQUEST_METHOD] => GET
[QUERY_STRING] =>
[SCRIPT_FILENAME] => /var/www/vhosts/industriemeister-forum.de/httpdocs/mytest.php
[PATH_INFO] =>
[FCGI_ROLE] => RESPONDER
[PHP_SELF] => /mytest.php
[REQUEST_TIME_FLOAT] => 1716152265.4315
[REQUEST_TIME] => 1716152265
)

 

[Ankebut]

@Kaspar@Plesk have you read this Post about nginx?

`$_SERVER['HTTP_HOST']` doesn't exist when requesting via HTTP/3 on nginx · Issue #13021 · php/php-src

Description I'm using nginx 1.25.3 + PHP 8.3.0. When requesting via HTTP/2, I can get $_SERVER['HTTP_HOST'] correctly. But when requesting via HTTP/3, HTTP_HOST doesn't exist in the array. Will PHP...

github.com

 

[Kaspar@Plesk]

@Kaspar@Plesk have you read this Post about nginx?

`$_SERVER['HTTP_HOST']` doesn't exist when requesting via HTTP/3 on nginx · Issue #13021 · php/php-src

Description I'm using nginx 1.25.3 + PHP 8.3.0. When requesting via HTTP/2, I can get $_SERVER['HTTP_HOST'] correctly. But when requesting via HTTP/3, HTTP_HOST doesn't exist in the array. Will PHP...

github.com

Yes, I have. Why?

 

[Ankebut]

I have now added it to fastcgi.conf, and after restarting Nginx, it works

fastcgi_param HTTP_HOST $host;

 

[Kaspar@Plesk]

Be aware that the fastcgi.conf file might get overwritten when Plesk updates. The next hotfix is going to be released soon, so I recommend keeping an eye on the file to see if it gets changed.