Hello, I don't find a working way to completly disable the use of IPv6 on armbian.   I'm using Armbian_5.69_Orangepipc2_Debian_stretch_next_4.19.13.img, fresh install with etcher/balena.   I've added the file /etc/sysctl.d/10-NoIPv6.conf with this content:   net.ipv6.conf.lo.disable_ipv6=1 net.ipv6.conf.default.disable_ipv6=1 net.ipv6.conf.all.disable_ipv6=1 I've modified /etc/hosts like that: 127.0.0.1 localhost orangepipc2 I've rebooted.