How to fix «Failed to fetch ftp://ftp.debian.org/debian/dists/jessie-proposed-updates/InRelease»?

Unix Debian
1

2

I have fixed it by the replacement:

from:

deb ftp://ftp.debian.org/debian jessie-proposed-updates main contrib non-free`

to:

deb http://ftp.us.debian.org/debian jessie-proposed-updates main contrib non-free