Re: Working towards HTTP3 - current MPM's only support TCP connections

On 8/10/26 2:51 PM, Aleksandr Gerasimov via dev wrote:
> Dear httpd developers,
> 
> HTTP/3 support in httpd has been a long-awaited feature, and it is great 
> to see this work moving forward.
> 
> I reviewed Machine Moon's mod_http3 implementation and have been 
> maintaining a fork with additional work aimed at making it practical for 
> existing httpd 2.4.x installations and bringing its behavior closer to 
> mod_http2, mod_ssl, and the httpd core.
> 
> Among other things, I added stock httpd 2.4.52+ compatibility, mod_ssl- 
> compatible SSL_* environment variables, request header limit handling, 
> H3 stream timeouts and abuse limits, QPACK dynamic table support, 
> configurable worker limits, TLS session ticket and early-data controls, 
> and several QUIC I/O and lifecycle fixes.
> 
> We have been building and testing it with httpd 2.4.68 and are very 
> happy with the results so far.
> 
> I would also like to ask whether there is interest in bringing this 
> functionality to the official 2.4.x branch. There is a large installed 
> base on 2.4.x, and having HTTP/3 available there would make the feature 
> much more accessible without requiring users to wait for or immediately 
> migrate to the next major httpd release.
> 
> If httpd PR #699 pull request against the 2.4.x branch would be useful, 
> I would be happy to prepare and submit one.
> 
> My fork with the additional changes is here:
> https://github.com/xl32/mod_http3 <https://github.com/xl32/mod_http3>

The PR you did for https://github.com/machine-moon/mod_http3 are 
covering all your changes?

> 
> Thank you for your work on httpd!
> 
> 
> Best regards,
> Oleksandr Gerasymov
> CIO
> CodeIT
> CodeIT Logo
> *W*: codeit.pro <https://codeit.pro>
> 
> On 8/7/2026 5:05 PM, Steffen wrote:
>> Good day,
>>
>> Developing an HTTP3 module for Apache HTTPD is something that is 
>> desperately needed, noting alternative web servers already offer HTTP3 
>> support, e.g. NGINX and Caddy.
>>
>> Whilst there's evidence of people actively working towards this, e.g. 
>> https://github.com/machine-moon/mod_http3, it's evidently not possible 
>> with the current 2.4.x code branch. To that end PR#699 https:// 
>> github.com/apache/httpd/pull/699 has been raised, as a workaround to 
>> allow (some) MPM's to note connections that are not TCP based.
>>
>> The following post provides a detailed insight to these issues - 
>> https://codeit.guru/apache-http3-pr-699-mpm-quic-backport-2-4-68
>>
>> We believe it would be really helpful if PR#699 could be approved for 
>> subsequent 2.4.x releases, and equally whether similar functionality 
>> could be added to mpm_winnt, so support for HTTP3 could be developed 
>> for Windows platforms too.
>>
>> ---
>>
>> Regards
>>
>> Steffen Pete


-- 
Cheers

Jean-Frederic