1The DNS64 code was written by Viagenie, 2009, by Simon Perrault as part 2of the Ecdysis project. The code is copyright by them, and has the BSD 3license (see the dns64/dns64.c file). 4 5To enable DNS64 functionality in Unbound, two directives in unbound.conf must 6be edited: 7 81. The "module-config" directive must start with "dns64". For example: 9 10 module-config: "dns64 validator iterator" 11 12If you're not using DNSSEC then you may remove "validator". 13 142. The "dns64-prefix" directive indicates your DNS64 prefix. For example: 15 16 dns64-prefix: 64:FF9B::/96 17 18The prefix must be a /96 or shorter. 19 20To test that things are working right, perform a query against Unbound for a 21domain name for which no AAAA record exists. You should see a AAAA record in 22the answer section. The corresponding IPv6 address will be inside the DNS64 23prefix. For example: 24 25 $ unbound -c unbound.conf 26 $ dig @localhost jazz-v4.viagenie.ca aaaa 27 [...] 28 ;; ANSWER SECTION: 29 jazz-v4.viagenie.ca. 86400 IN AAAA 64:ff9b::ce7b:1f02 30 31