I'm trying to setup PROXY protocol between a HAproxy acting as a load-balancer (tcp mode) and httpd (2.4.6)running behind. The objective is to get the "real" client IP addresses on the httpd-side.

In haproxy.conf the keyword send-proxy has been put in the selected backend.

The line:

LoadModule remoteip_module modules/mod_remoteip.so

has been added to httpd config file.

The directive RemoteIPProtocolAddress On has been set in the httpd virtualhost configuration file.

However, when reloading/restarting httpd the following errors appears:

[root@XXXXXXXXX conf.d]# systemctl status httpd
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: enabled)
   Active: failed
[...]
Invalid command 'RemoteIPProxyProtocol', perhaps misspelled ...

Looking at the mod_remoteip source code for httpd 2.4.6, it appears the directive RemoteIPProxyProtocol does not exist anymore.

I'm not sure to understand how the versioning works. For instance I can see the RemoteIPProxyProtocol directive exists in mod_remoteip 2.4.43 but not in mod_remoteip 2.4.0.

How can I workaround this issue ? E.g. compiling another mod_remoteip version ? Downgrading httpd? Other?

Thanks.