What is the second ftp port number?

WD Legacy Products My Book Live
1

I already use another NAS’s FTP. And I tried to use MY book live’s FTP togather, but it didn’t use 21port . So I need second FTP port number.

2

various answers on this forums, just search for them.

Here is one:

http://community.wd.com/t5/My-Book-Live/Default-Port-Number/m-p/645811/highlight/true#M27192