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Consul Notes

Last Updated: November 1st, 2021

Consul DNS Routing Setup​

To set up Consul to respond to forwarded DNS requests run the following commands to redirect port 53 to 8600.

iptables -t nat -A OUTPUT -d localhost -p udp -m udp --dport 53 -j REDIRECT --to-ports 8600
iptables -t nat -A OUTPUT -d localhost -p tcp -m tcp --dport 53 -j REDIRECT --to-ports 8600
iptables -t nat -A PREROUTING -p udp -m udp --dport 53 -j REDIRECT --to-ports 8600
iptables -t nat -A PREROUTING -p tcp -m tcp --dport 53 -j REDIRECT --to-ports 8600

If you have a Windows DNS environment you can set up to forward to consul. Use consul as the DNS Domain and enter your consul server IPs.

dns-forward

You can then add CNAME records in your domain and point it at a consul service.

dns-forward

PS> nslookup adguard
Server:  sequoia.techstormpc.net
Address:  10.0.0.2

Name:    adguard.service.consul
Address:  10.0.10.130
Aliases:  adguard.techstormpc.net