vsftpd default file permissions (default umask)

For default permissions of 644

local_enable=YES
write_enable=YES
local_umask=0022
file_open_mode=0777

anonymous_enable=NO
anon_upload_enable=YES
anon_mkdir_write_enable=YES

From http://wintelguy.com/umask-calc.pl 

File Mode Creation Mask / umask Calculator

Mask	Files (requested permissions 666)	Directories (requested permissions 777)
000	666 (rw-rw-rw-)	777 (rwxrwxrwx)
002	664 (rw-rw-r--)	775 (rwxrwxr-x)
007	660 (rw-rw----)	770 (rwxrwx---)
022	644 (rw-r--r--)	755 (rwxr-xr-x)
027	640 (rw-r-----)	750 (rwxr-x---)
077	600 (rw-------)	700 (rwx------)
277	400 (r--------)	500 (r-x------)