Hint
If your firewall blocks passive FTP, you might get an error message that reads: “Passive mode refused. Turning off passive mode. No control connection for command: No such file or directory”. If this happens, try using a "smart" FTP client like NCFTP (available on most UNIX machines). Smart FTP clients are better at auto-negotiating active/passive FTP connections than are older FTP clients (e.g. Sun Solaris FTP).

From: Chapter 5, The Single Nucleotide Polymorphism Database (dbSNP) of Nucleotide Sequence Variation

Cover of The NCBI Handbook
The NCBI Handbook [Internet].
McEntyre J, Ostell J, editors.

NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.