cygwin-rsyncd: Rsyncd for Cygwin
Download and run cygwin-rsyncd-3.2.3.0_installer.exe to install rsyncd on your WinXX client for doing BackupPC backups.
Clone the git repository at https://github.com/backuppc/cygwin-rsyncd.git if you want to customize and build your own cygwin-rsyncd executable (eg: presetting some configuration parameters for your site).
Thanks to Ray Frush, this distribution now comes with the NSIS installer, which wraps everything in a single .exe. (See nsis.sourceforge.net.). This was based on the NSIS wrapper used by cwRsync. This particular version was updated by Yves Ouvrie.
This distribution includes rsync 3.2.3 and a handful of cygwin 3.1.7 libraries. It was built using NSIS 3.06.1.
When you download and run cygwin-rsyncd-3.2.3.0_installer.exe, the cygwin and rsync files are installed in c:\rsyncd. A new windows service called RsyncServer is created and activated (ie: run). The c:\rsyncd directory will have an uninstall executable which will remove the service and installation files.
You will need to edit the c:\rsyncd\rsyncd.conf and c:\rsyncd\rsyncd.secrets files to set your client-specific shares, backup user name and password. You should restart the Windows RsyncServer service to get the new settings.
To ensure initial security, the c:\rsyncd\rsyncd.secrets file initially has no users, and the c:\rsyncd\rsyncd.conf only allows connections from two specific IP addresses. So unless you edit those two files you won't be able to connect to the rsyncd server.
If you have Windows firewall enabled then you will need to allow rsync to listen on TCP port 873. You can do that through the WinXX firewall menus. You can also make that rule specific to the BackupPC server IP addresses, so no other hosts can contact the rsyncd server on this client.
Warning about installing multiple cygwin1.dll files
If you already have Cygwin installed then you should not install the cygrunsrv.exe and cygwin1.dll files. Installing multiple versions of the same DLL is a bad idea. Instead, you should manually install the rsync.exe executable in your Cygwin hierarchy and use the existing Cywin utilities.
In fact, a package like this that contains a local cygwin1.dll is discouraged by the cygwin community, since if the user later installs the real cygwin there will be two installed cygwin1.dll's. Please don't complain to the cygwin user list if you do this and things break.
Cygwin is a great package with a simple installer. If you want to use Cygwin then use the setup.exe program at http://cygwin.com, and don't use the cygwin1.dll from this installation. You can easily install rsync from the Cygwin installer.
Setting Up BackupPC To Use Windows rsyncd
The following options will have to be set in either the global config.pl or the per-host config.pl files. For more information see the BackupPC documentation:
#
# Tell BackupPC we wish to use rsyncd: requires rsync to be running as
# a service/daemon on the client system
#
$Conf{XferMethod} = "rsyncd";
#
# Tell BackupPC which user name and password to use. This should
# match the userName:password pair in the C:\rsyncd\rsyncd.secrets
# file on the client.
#
$Conf{RsyncdUserName} = "UUU";
$Conf{RsyncdPasswd} = "PPP";
#
# Tell BackupPC which share to backup. This should be the name
# of the module from C:\rsyncd\rsyncd.conf on the client (the
# name inside the square brackets). In the sample rsynd.conf
# file the cDrive module is the entire C drive.
#
$Conf{RsyncShareName} = "cDrive";
Building a New NSIS Wrapped Executable
The small tree of files to install, and the nsi script backuppc_rsync-server.nsi are available at https://github.com/backuppc/cygwin-rsyncd.git. This isn't program source code - it is the source tree that contains the executables and libraries for building cygwin-rsyncd-3.2.3.0_installer.exe.
If you want to change any of the installed files (eg: configuration files), perhaps with site-specific settings, then edit the files as necessary.
To create the .exe installer, you will need to install NSIS from nsis.sourceforge.net. When you run NSIS, tell it to load/run the backuppc_rsync-server.nsi file, and it will create a .exe file that you can rename. To avoid version confusion, you should use a different name or version from the standard distribution, cygwin-rsyncd-3.2.3.0_installer.exe.
License
See license.txt for licenses for cwRsync, Cygwin and Rsync.
If you install via the NSIS .exe wrapper, the license file will be C:\rsyncd\license.txt.