/usr/share/puppet/modules.available/puppetlabs-apache/templates/mod/rpaf.conf.erb is in puppet-module-puppetlabs-apache 3.0.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | # Enable reverse proxy add forward
RPAFenable On
# RPAFsethostname will, when enabled, take the incoming X-Host header and
# update the virtual host settings accordingly. This allows to have the same
# hostnames as in the "real" configuration for the forwarding proxy.
<% if @sethostname -%>
RPAFsethostname On
<% else -%>
RPAFsethostname Off
<% end -%>
# Which IPs are forwarding requests to us
RPAFproxy_ips <%= Array(@proxy_ips).join(" ") %>
# Setting RPAFheader allows you to change the header name to parse from the
# default X-Forwarded-For to something of your choice.
RPAFheader <%= @header %>
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