Which FTPs are most used by ports?

[Francisco Reyes]

I am about to install FreeBSD at a new job. They block ftp, along with most 
other ports.

I may be able to get a whole open for the freebsd server to be able to ftp 
from some specific machines. Any suggestions what machines I should add to 
the list?

For programs I know about I plan to do "make fetch-recursive" at home and 
then copy the /usr/ports/distfile directory.