Pb proxy

Could not connect to proxy.ft.grp:8080 (81.7.200.82). - connect (113 No route to host)
Failed to fetch http://fr.archive.ubuntu.com/ubuntu/pool/main/b/bc/bc_1.06.94-3ubuntu1_amd64.deb  

vi /etc/apt/apt.conf
Acquire::http::Proxy "http://gateway.zscaler.net:80";