before  i type emerge --sync
after emerge portage
this is 2^n 
 ftp://cudlug.cudenver.edu/pub/mirrors/distributions/gentoo/distfiles/portage-2.1.3.16.tar.bz2
  (tentativo: 2) => `/usr/portage/distfiles/portage-2.1.3.16.tar.bz2'
Connessione a cudlug.cudenver.edu|1.0.0.0:21... fallito: Timeout della connessione.
Altro tentativo in corso.// another dont esc...