Downloading http://security.debian.org/dists/stretch/updates/InRelease...
Error downloading http://security.debian.org/dists/stretch/updates/InRelease: http://security.debian.org/dists/stretch/updates/InRelease: Get "http://security.debian.org/dists/stretch/updates/InRelease": http: error connecting to proxy http://127.0.0.1:3137: dial tcp 127.0.0.1:3137: connection refused retrying...
Retrying 0 http://security.debian.org/dists/stretch/updates/InRelease...
Giving up on http://security.debian.org/dists/stretch/updates/InRelease...
Downloading http://security.debian.org/dists/stretch/updates/Release...
Error downloading http://security.debian.org/dists/stretch/updates/Release: http://security.debian.org/dists/stretch/updates/Release: Get "http://security.debian.org/dists/stretch/updates/Release": http: error connecting to proxy http://127.0.0.1:3137: dial tcp 127.0.0.1:3137: connection refused retrying...
Retrying 0 http://security.debian.org/dists/stretch/updates/Release...
Giving up on http://security.debian.org/dists/stretch/updates/Release...
ERROR: unable to fetch mirror: http://security.debian.org/dists/stretch/updates/Release: Get http://security.debian.org/dists/stretch/updates/Release: http: error connecting to proxy http://127.0.0.1:3137: dial tcp 127.0.0.1:3137: connection refused