Étape N°5 : Un dig CAA permet de vérifier que le champ est bien mis en place :
$ dig CAA lafibre.info
; <<>> DiG 9.11.3-1ubuntu1-Ubuntu <<>> CAA lafibre.info
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62936
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;lafibre.info. IN CAA
;; ANSWER SECTION:
lafibre.info. 899 IN CAA 0 issue "letsencrypt.org"
;; Query time: 89 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sat May 05 15:50:41 CEST 2018
;; MSG SIZE rcvd: 75