Desabilitando ipv6

echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf
echo "net.ipv6.conf.default.disable_ipv6 = 1"  >> /etc/sysctl.conf
echo "net.ipv6.conf.lo.disable_ipv6 = 1"  >> /etc/sysctl.conf
sysctl -p

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