Hello Horst and thanks for your bug report. I think I'm able to
reproduce the issue and hopefully I came up with a "more minimal"
configuration. As a first step to better understand what's going on here
I'd like to check with you that my config does indeed cause the problem.
On a clean Impish system I did the folowing:
--- reproducer (tentative) ---
1. apt install apache2
2. Create/etc/apache2/sites-available/management.conf with:
<VirtualHost 127.0.0.1:80>
<Location /balancer-manager>
SetHandler balancer-manager
</Location>
LogLevel debug
ErrorLog ${APACHE_LOG_DIR}/management_error.log
CustomLog ${APACHE_LOG_DIR}/management_access.log combined
</VirtualHost>
3. a2enmod proxy_balancer
4. a2ensite management
5. systemctl restart apache2
6. With a brower (in my case: Firefox) go to http://127.0.0.1/balancer-manager.
A "Load Balancer Manager for 127.0.0.1" page opens.
7. Check /var/log/apache2/management_error.log and verify that is has an error
line like:
[client 127.0.0.1:54490] AH10187: ignoring params in balancer-manager
cross-site access
which is the problem this bug report is about.
--- end ---
Is this in your opinion a good reproducer? Is there an Ubuntu (or
Debian) release where the same set of steps does *not* generate that
AH10187 error?
Waiting for your reply I'm marking this bug report as Incomplete; please
comment back and we'll look at it again. Thanks!
Note: I didn't mark this report as a duplicate of LP: #1842701 because
I'm not confident enough it is the very same problem, but it probably
is.
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https://bugs.launchpad.net/bugs/1939678
Title:
Apache2 Balancer Manager not working after dist-upgrade to focal
behind a Proxy
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