Hello,
Same problem here, CNAME domain, Dynamic IP with DNS provider services (https://freedns.afraid.org/)
My dig (domain name git.gplaza.cl) :
; <<>> DiG 9.9.5-9ubuntu0.3-Ubuntu <<>> git.gplaza.cl
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64276
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 4, ADDITIONAL: 7
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;git.gplaza.cl. IN A
;; ANSWER SECTION:
git.gplaza.cl. 60 IN CNAME gplaza.cl.
gplaza.cl. 60 IN A 190.20.221.161
;; AUTHORITY SECTION:
gplaza.cl. 3593 IN NS ns4.afraid.org.
gplaza.cl. 3593 IN NS ns1.afraid.org.
gplaza.cl. 3593 IN NS ns3.afraid.org.
gplaza.cl. 3593 IN NS ns2.afraid.org.
;; ADDITIONAL SECTION:
ns1.afraid.org. 293 IN A 50.23.197.95
ns2.afraid.org. 293 IN A 208.43.71.243
ns2.afraid.org. 293 IN AAAA 2607:f0d0:3001:92::2
ns3.afraid.org. 293 IN A 69.197.18.162
ns4.afraid.org. 293 IN A 70.39.97.253
ns4.afraid.org. 293 IN AAAA 2610:150:bddb:d271::2
;; Query time: 2049 msec
;; SERVER: 158.170.64.22#53(158.170.64.22)
;; WHEN: Sat Apr 02 04:10:29 CLT 2016
;; MSG SIZE rcvd: 274
How i can help to debug ? Any adanced log ? i have tried --staging too, same result :
Failed authorization procedure. git.glaza.cl (http-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: DNS problem: NXDOMAIN looking up A for git.glaza.cl
Thanks for your help 