rsync-ssl(1) User Commands rsync-ssl(1)
rsync-ssl - a helper script for connecting to an ssl rsync daemon
rsync-ssl [--type=SSL_TYPE] RSYNC_ARGS
The rsync-ssl script helps you to run an rsync copy to/from an rsync daemon that requires ssl connections. The script requires that you specify an rsync-daemon arg in the style of either hostname:: (with 2 colons) or rsync://hostname/. The default port used for connecting is 874 (one higher than the normal 873) unless overridden in the environment. You can specify an overriding port via --port or by including it in the normal spot in the URL format, though both of those require your rsync version to be at least 3.2.0.
If the first arg is a --type=SSL_TYPE option, the script will only use that particular program to open an ssl connection instead of trying to find an openssl or stunnel executable via a simple heuristic (assuming that the RSYNC_SSL_TYPE environment variable is not set as well -- see below). This option must specify one of openssl or stunnel. The equal sign is required for this particular option. All the other options are passed through to the rsync command, so consult the rsync(1) manpage for more information on how it works.
The ssl helper scripts are affected by the following environment variables: RSYNC_SSL_TYPE Specifies the program type that should be used to open the ssl connection. It must be one of openssl or stunnel. The --type=SSL_TYPE option overrides this, when specified. RSYNC_SSL_PORT If specified, the value is the port number that is used as the default when the user does not specify a port in their rsync command. When not specified, the default port number is 874. (Note that older rsync versions (prior to 3.2.0) did not communicate an overriding port number value to the helper script.) RSYNC_SSL_CERT If specified, the value is a filename that contains a certificate to use for the connection. RSYNC_SSL_CA_CERT If specified, the value is a filename that contains a certificate authority certificate that is used to validate the connection. RSYNC_SSL_OPENSSL Specifies the openssl executable to run when the connection type is set to openssl. If unspecified, the $PATH is searched for "openssl". RSYNC_SSL_GNUTLS Specifies the gnutls-cli executable to run when the connection type is set to gnutls. If unspecified, the $PATH is searched for "gnutls-cli". RSYNC_SSL_STUNNEL Specifies the stunnel executable to run when the connection type is set to stunnel. If unspecified, the $PATH is searched first for "stunnel4" and then for "stunnel".
rsync-ssl -aiv example.com::mod/ dest rsync-ssl --type=openssl -aiv example.com::mod/ dest rsync-ssl -aiv --port 9874 example.com::mod/ dest rsync-ssl -aiv rsync://example.com:9874/mod/ dest
Note that using an stunnel connection requires at least version 4 of stunnel, which should be the case on modern systems. Also, it does not verify a connection against the CA certificate collection, so it only encrypts the connection without any cert validation unless you have specified the certificate environment options. This script also supports a --type=gnutls option, but at the time of this release the gnutls-cli command was dropping output, making it unusable. If that bug has been fixed in your version, feel free to put gnutls into an exported RSYNC_SSL_TYPE environment variable to make its use the default.
Please report bugs! See the web site at https://rsync.samba.org/.
This man page is current for version 3.2.3 of rsync.
rsync is distributed under the GNU General Public License. See the file COPYING for details. A web site is available at https://rsync.samba.org/. The site includes an FAQ-O-Matic which may cover questions unanswered by this manual page.
This manpage was written by Wayne Davison. Mailing lists for support and development are available at https://lists.samba.org/.
This page is part of the rsync (a fast, versatile, remote (and local) file-copying tool) project. Information about the project can be found at ⟨https://rsync.samba.org/⟩. If you have a bug report for this manual page, see ⟨https://rsync.samba.org/bugzilla.html⟩. This page was obtained from the tarball fetched from ⟨https://download.samba.org/pub/rsync/⟩ on 2021-08-27. If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to firstname.lastname@example.org rsync-ssl 3.2.3 06 Aug 2020 rsync-ssl(1)
Pages that refer to this page: rsync(1), rsyncd.conf(5)