How to configure Bind9 to work with wildcard domains?

Posted on March 15, 2015

My app allows users to use own domains for their profiles. They should be able to delegate their domains to my ns servers (i.e. ns1.mynsdomain.com, ns2.mynsdomain.com).

So i decided to try Bind9 as a DNS server, but can’t figure out how to configure it properly to work with wildcard domains.

Things i did:

Added zone:

zone "." {
	type master;
	file "db.wild";
};

Added db.wild file with following content:

$TTL	86400
@	IN	SOA	 mynsdomain.com. root.mynsdomain.com. (
			 100500		; Serial
			 604800		; Refresh
			  86400		; Retry
			2419200		; Expire
			  86400 )	; Negative Cache TTL

	IN	NS	ns1.mynsdomain.com.
	IN	NS	ns2.mynsdomain.com.
	IN	A	MY_SERVER_IP_ADDRESS

ns1	IN	A	MY_SERVER_IP_ADDRESS
ns2	IN	A	MY_SERVER_IP_ADDRESS

*.	IN	A	MY_SERVER_IP_ADDRESS

Now if i try to ping example.com (which is already delegated to ns1.mynsdomain.com./ns2.mynsdomain.com.), it responds with “cannot resolve example.com: Unknown host”

What’s wrong with my setup?

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