proxy ftp-command
Execute an ftp command on a secondary control connection.
This command allows simultaneous connection to two remote FTP
servers for transferring files between the two servers. The
first proxy command should be an open, to establish the sec-
ondary control connection. Enter the command "proxy ?" to
see other FTP commands executable on the secondary connec-
tion. The following commands behave differently when pref-
aced by proxy: open will not define new macros during the
auto-login process, close will not erase existing macro defi-
nitions, get and mget transfer files from the host on the
primary control connection to the host on the secondary con-
trol connection, and put, mput, and append transfer files
from the host on the secondary control connection to the host
on the primary control connection. Third party file trans-
fers depend upon support of the FTP protocol PASV command by
the server on the secondary control connection.