Consul

Add forward dns port iptables

iptables -t nat -I OUTPUT -p tcp -o lo --dport 53 -j REDIRECT --to-ports 8600
iptables -t nat -I OUTPUT -p udp -o lo --dport 53 -j REDIRECT --to-ports 8600

Add forward firewalld

firewall-cmd  --permanent --direct --add-rule ipv4 nat OUTPUT 0 -p tcp -o lo --dport 53 -j REDIRECT --to-ports 8600
firewall-cmd  --permanent --direct --add-rule ipv4 nat OUTPUT 0 -p udp -o lo --dport 53 -j REDIRECT --to-ports 8600