Network Test

For validate networ end point:

case "$(curl -s --max-time 2 -I https://[-- IP end point ---]/ | sed 's/^[^ ]* *\([0-9]\).*/\1/; 1q')" in [23]) echo "HTTP connectivity is up";; 5) echo "The web proxy won't let us through";; *) echo "The network is down or very slow";; esac