When connecting anonymously you must provide the share identifier (/DNA_TECH_SHARED_INSTRUMENTS).
Connecting
The easiest way to connect is by using an SFTP client. A popular cross platform option is Filezilla.
Alternatively, it may be useful to connect via the command line if transfering directly from a server:
sftp -P 2200 'anonymous'@bioshare.bioinformatics.ucdavis.edu:/DNA_TECH_SHARED_INSTRUMENTS