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Update mod_cloudflare to 1.2.0: unify source file, add autotools, upd…
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…ate CloudFlare IP ranges to latest
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echtish committed Aug 2, 2013
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15 changes: 15 additions & 0 deletions ChangeLog
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* Mar 20 2013 CloudFlare Inc <[email protected]> - 1.2.0
- Refactor for Apache 2.4, utilize autotools for RPM/DEB builds

* Aug 30 2012 CloudFlare Inc <[email protected]> - 1.1.2
- Bugfix for intermittent segfaults under some conditions.
- Pulled from remoteip codebase.

* Jun 03 2012 CloudFlare Inc <[email protected]> - 1.1.1
- Bugfix for DenyAll behavior when CF-Connecting-IP header not available

* May 20 2012 CloudFlare Inc <[email protected]> - 1.1.0
- .deb and .rpm release tested on Debian 6.0, Ubuntu 8.04, Ubuntu 10.04,
CentOS 5, CentOS 6, RHEL 5, RHEL 6, OpenSuSE 11.4, OpenSuSE 12.1 all on 32-bit
and 64-bit architectures. These were produced on Fedora 16, Ubuntu 12.04 and
OpenSuSE 12.1
202 changes: 202 additions & 0 deletions LICENSE
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46 changes: 46 additions & 0 deletions Makefile.in
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srcdir = @srcdir@

DESTDIR =
LIBEXECDIR = @LIBEXECDIR@

CPPFLAGS = @CPPFLAGS@
CFLAGS = @CFLAGS@
LDFLAGS = @LDFLAGS@
LDLIBS = @LDLIBS@

APXS = @APXS@

all : mod_cloudflare.la

mod_cloudflare.la : mod_cloudflare.c
$(APXS) -c $(CPPFLAGS) $(CFLAGS) $(srcdir)/mod_cloudflare.c $(LDFLAGS) $(LDLIBS)

$(DESTDIR)$(LIBEXECDIR) :
mkdir -p $@

install : all $(DESTDIR)$(LIBEXECDIR)
$(APXS) -i -S LIBEXECDIR=$(DESTDIR)$(LIBEXECDIR) -n 'mod_cloudflare' $(srcdir)/mod_cloudflare.la

clean :
-rm -f $(srcdir)/.libs/*
-rm -f $(srcdir)/*.o
-rm -f $(srcdir)/*.lo
-rm -f $(srcdir)/*.la
-rm -f $(srcdir)/*.slo
-rm -rf $(srcdir)/.libs
-rm -rf autom4te.cache
-rm -f config.log config.status

distclean : clean
-rm -f Makefile

gitclean : distclean
-rm -f configure src-package.tar.gz

src-package:
@tar cz *.c configure.ac Makefile.in LICENSE ChangeLog README > $@.tar.gz

$(srcdir)/configure: configure.ac
cd '$(srcdir)' && autoconf && ./configure

Makefile: Makefile.in configure
85 changes: 42 additions & 43 deletions README
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Copyright CloudFlare 2012 cloudflare.com
mod_cloudflare for Apache

======> mod_cloudflare.c
Copyright CloudFlare Inc. 2013

Based on mod_remoteip.c, this apache extension will replace the remote_ip variable in user's logs with the correct remote_ip sent from CloudFlare.
This also does authentication, only performing the switch for requests originating from 204.93.173.0/24 (by default).
## mod_cloudflare.c ##

To install:
Based on mod_remoteip.c, this Apache extension will replace the remote_ip
variable in user's logs with the correct remote IP sent from CloudFlare. The
module only performs the IP substitution for requests originating from
CloudFlare IPs by default.

# apxs2 -a -i -c mod_cloudflare.c
To install, either run apxs2 directly against the .c source file:

No further configuration is needed. However, if you wish to override the default values, the following directives are exposed:
$ apxs2 -a -i -c mod_cloudflare.c

* CloudFlareRemoteIPHeader
An alternative way to install is to use GNU autotools, which requires that
autoconf and automake already be installed:

This specifies the header which contains the original IP. Default:

CloudFlareRemoteIPHeader CF-Connecting-IP
$ autoconf
$ ./configure
$ make
$ make install

* CloudFlareRemoteIPTrustedProxy
No further configuration is needed. However, if you wish to override the
default values, the following directives are exposed:

This is the IP range from which we will allow the CloudFlareRemoteIPHeader to be used from. See https://www.cloudflare.com/wiki/What_are_the_CloudFlare_IP_address_ranges.
### CloudFlareRemoteIPHeader ###

Note that on some Debian systems, you may have to add a LoadModule directive manually. This should look like:

LoadModule cloudflare_module /usr/lib/apache2/modules/mod_cloudflare.so
This specifies the header which contains the original IP. Default:

Replace /usr/lib/apache2/modules/mod_cloudflare.so with the path to mod_cloudflare.so on your system.
CloudFlareRemoteIPHeader CF-Connecting-IP

If you cannot find apxs or apxs2, on a Debian or Ubuntu distro you can install this tool with:
### CloudFlareRemoteIPTrustedProxy ###

# apt-get install apache2-prefork-dev
This is the IP range from which we will allow the CloudFlareRemoteIPHeader to
be used from. See https://www.cloudflare.com/wiki/What_are_the_CloudFlare_IP_address_ranges
for a complete list.

NOTES:
Note that on some systems, you may have to add a LoadModule directive
manually. This should look like:

*) If mod_cloudflare and mod_remoteip are enabled on the same web server, the server will crash if they both try to set the remote IP to a different value.
*) Enableing mod_cloudflare will not effect the performance of Apache in any noticable maner. AB testing both over LAN and WAN show no equalilent numbers with and without mod_cloudflare.
*) If you like, you may also add the directive DenyAllButCloudFlare. This will result in all requests from IPs which are not in the CloudFlareRemoteIPTrustedProxy range being denied with a status of 403.
LoadModule cloudflare_module /usr/lib/apache2/modules/mod_cloudflare.so

Packaging
The packaging directory contains a makefile to run the package process. For each class of system you wish to target, run the approriate rules:
debian (& ubuntu)
sudo make pkg-deb-system-prep
make pkg-deb
Replace /usr/lib/apache2/modules/mod_cloudflare.so with the path to
mod_cloudflare.so on your system.

redhat (& centos)
sudo make pkg-rpm-system-prep
make pkg-rpm
If you cannot find apxs or apxs2, install apache2-dev on Debian and Ubuntu, or
httpd-devel on Red Hat and CentOS:

suse
sudo make pkg-rpm-suse-system-prep
make pkg-rpm-suse
$ apt-get install apache2-dev
$ yum install httpd-devel

Testing
To test a package run the test_debian, test_rpm or test_rpm.suse scripts on the target machine:
test_debian.sh libapache2-mod-cloudflare_1.1_i386.deb
test_rpm.suse.sh mod_cloudflare-1.1.0-3.fc16.x86_64.rpm
test_rpm.suse.sh mod_cloudflare-1.1.0-3.x86_64.suse.rpm
NOTES:

- If mod_cloudflare and mod_remoteip are enabled on the same web server, the
server will crash if they both try to set the remote IP to a different value.

Releases
2012-08-30 1.1.2 Bugfix for intermittent segfaults under some conditions. Pulled from remoteip codebase.
2012-06-03 1.1.1 Bugfix for DenyAll behavior when CF-Connecting-IP header not available.
2012-05-20 1.1.0 .deb and .rpm release tested on Debian 6.0, Ubuntu 8.04, Ubuntu 10.04, CentOS 5, CentOS 6, RHEL 5, RHEL 6, OpenSuSE 11.4, OpenSuSE 12.1 all on 32-bit and 64-bit architectures. These were produced on Fedora 16, Ubuntu 12.04 and OpenSuSE 12.1
- Enabling mod_cloudflare will not effect the performance of Apache in any
noticeable manner. AB testing both over LAN and WAN show no equivalent numbers
with and without mod_cloudflare.

- If you like, you may also add the directive DenyAllButCloudFlare. This will result
in all requests from IPs which are not in the CloudFlareRemoteIPTrustedProxy range
being denied with a status of 403.
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