# server ss -plnt tail -f /var/log/squid/access.log & # client ## proxy set via env variable export http_proxy=http://10.1.100.1:3128 curl -I http://lpic2.unix.nl/ ## no proxy unset http_proxy curl -I http://lpic2.unix.nl/ ## proxy set inline curl -Ix http://10.1.100.1:3128 http://lpic2.unix.nl/