[Unit] Description=Hack since 4.3 kernel does not support net.ipv6.ip_nonlocal_bind Before=haproxy.service [Service] ExecStart=/sbin/ip -6 addr add 2620:101:f000:4901:c5c::10ad/64 dev lo ExecStart=/sbin/ip -6 addr add 2620:101:f000:4901:c5c::c:10ad/64 dev lo ExecStart=/sbin/ip -6 addr add 2620:101:f000:4901:c5c::c0b:10ad/64 dev lo RemainAfterExit=true Type=oneshot [Install] WantedBy=multi-user.target