You could rely on wget which usually handles ftp get properly (at least in my own experience). For example:
wget -r ftp://user:[email protected]/
You can also use -m which is suitable for mirroring. It is currently equivalent to -r -N -l inf.
If you’ve some special characters in the credential details, you can specify the --user and --password arguments to get it to work. Example with custom login with specific characters:
wget -r --user="user@login" --password="Pa$$wo|^D" ftp://server.com/
As pointed out by @asmaier, watch out that even if -r is for recursion, it has a default max level of 5:
-r
--recursive
Turn on recursive retrieving.
-l depth
--level=depth
Specify recursion maximum depth level depth. The default maximum depth is 5.
If you don’t want to miss out subdirs, better use the mirroring option, -m:
-m
--mirror
Turn on options suitable for mirroring. This option turns on recursion and time-stamping, sets infinite
recursion depth and keeps FTP directory listings. It is currently equivalent to -r -N -l inf
--no-remove-listing.