GNU Rush |
|
Restricted User Shell |
Sergey Poznyakoff |
On the server side, rsync
is executed with the
--server command line option. In addition, when copying
files from the server, the --sender option is used. This
makes it possible to discern between incoming and outgoing requests.
In our setup, rsync
is used the same way as scp
, so
the two rules will be:
rule rsync-incoming match $command ~ "^rsync --server" && \ $command !~ --sender && \ ${-1} ~ "/incoming/" && ${-1} !~ "\\.\\./" set [0] =~ "s|^|/usr/bin/|" set [-1] =~ "s|^|/home/ftp/|" rule rsync-home match $command ~ "^rsync" && \ ${-1} !~ "^[^/]" && \ ${-1} !~ "\\.\\./" set [0] = "s|^|/usr/bin/|" set [-1] =~ "s|^|public_html/|" chdir "~"
The trap rules for rsync
are trivial:
rule rsync-to-trap match $command ~ "^rsync.*--sender" exit "Error: Downloads from this directory prohibited" rule rsync-from-trap match $command ~ "^rsync" exit "Error: Uploads to this directory prohibited"
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