I have just tried with one of my sites the following:
ncftpget -u
user@domain.org -p password
ftp://goose.xssl.net/../../var/log/httpd/error_log and it worked ok.
ncftpget is a command line ftpclient so this may work for you as well.
The other thing is to go back to whoever makes summary and see if they can handle absolute urls or a change directory request after logging into a server.