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.

 

[Paulo_o]

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.

Regarding the code

fastcgi_param HTTP_HOST $host;

does it work on the nginx additional directives (to avoide overwritten when Plesk updates)?

 

[Ankebut]

does it work on the nginx additional directives (to avoide overwritten when Plesk updates)?

No

 

[Paulo_o]

No

Any solution?

 

[Ankebut]

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

Make this change. Plesk updates will also proceed without any issues. The colleague up there isn't very familiar with Plesk.