wenxin-wang/subdomain-recur-cname-recursor

setup a "recursive" subdomain nameserver using pdns-recursor (not recommended)

About

This repo contains a lua script for PowerDNS Recursor and a sample test setup.

The script implements a "recursive cname" function. With a specified "recursive subdomain", e.g. "re.example.com", all names in that subdomain (e.g. "a.b.re.example.com") are handled as follows:

1. "name" part is extracted from the query (e.g. "a.b")
2. if "name" part is an IPv4 address, return that address for type A query, and nodata for all other types
3. else return a CNAME record pointing to "name" part as a domain (e.g. "a.b.")

The DNS64 version is NOT usable.

Test

cd subdomain-recur-cname/
pdns_recursor --config-dir=test
# pdns_recursor --config-dir=test-dns64
dig -p 5333 @::1 A    www.google.com.re.example.com
dig -p 5333 @::1 AAAA www.google.com.re.example.com
dig -p 5333 @::1 A    1.1.1.1.re.example.com
dig -p 5333 @::1 AAAA 1.1.1.1.re.example.com
dig -p 5333 @::1 A    1.1.1.1111.re.example.com