go-wild-dns

Go-Wild-DNS

Micro DNS-server that implements wildcard-ip DNS magic functionality:

        10.0.0.1.ip.mydomain.io  resolves to   10.0.0.1
    www.10.0.0.1.ip.mydomain.io  resolves to   10.0.0.1
 mysite.10.0.0.1.ip.mydomain.io  resolves to   10.0.0.1
foo.bar.10.0.0.1.ip.mydomain.io  resolves to   10.0.0.1

It's like your own xip.io

TLS Mode

Optionally go-wild-dns supports TLS Mode for wildcard certificates (which can only wildcard up to first dot):

        10-0-0-1.ip.mydomain.io  resolves to   10.0.0.1
    www-10-0-0-1.ip.mydomain.io  resolves to   10.0.0.1
 mysite-10-0-0-1.ip.mydomain.io  resolves to   10.0.0.1
foo-bar-10-0-0-1.ip.mydomain.io  resolves to   10.0.0.1

TXT records supports (for letencrypt)

See information about TXT_RECORDS_PATH in go-wild-dns.service

Setup

Create NS record for magic-domain:

ip.mydomain.io 	NS 	ns1.ip.mydomain.io

and A record too:

ns1.ip.mydomain.io  A 1.2.3.4

Now go to the 1.2.3.4 server (assuming you're using systemd-based Linux):

1. Setup go compiler, build go-wild-dns binary (just run go build), copy binary to /opt/bin/go-wild-dns
2. Edit go-wild-dns.service: specify your DOMAIN_SUFFIX environment variable. Specify IP of other NS servers if you are using > 1.
3. Copy go-wild-dns.service to /etc/systemd/system/
4. systemctl daemon-reload && systemctl enable go-wild-dns && systemctl start go-wild-dns
5. Allow firewall access to port 53 (UDP)

Now repeat everything for secondary server (optional)

DNS Pecularities

• No NS / SOA records implemented
• Returns its own IP as a fallback