Make rdiff-backup use a different port for ssh
Summary:
rdiff-backup --remote-schema "ssh -C -p9222 %s rdiff-backup --server"
username@remoteserver::/path_to/filestobackup
/path_to/backedupfiles
...worked for me, to backup a remote server via a non standard ssh port (9222 in the above example). Note the double quotes around the string following --remote-schema. All examples I could find on the Internet used single quotes, and using rdiff-backup 1.2.8 between two CentOS 5 machines, this did not work.