After some tests at Let's Debug all
three methods of testing : HTTP-01, DNS-01 and TLS-ALPN-01
resulted in the same error :
Test result for stokkie.net using tls-alpn-01
LetsEncryptStaging
DEBUG
Challenge update failures for stokkie.net in order https://acme-staging-v02.api.letsencrypt.org/acme/order/5751349/4803159424
acme: error code 400 "urn:ietf:params:acme:error:dns": DNS problem: SERVFAIL looking up A for stokkie.net - the domain's nameservers may be malfunctioning; DNS problem: SERVFAIL looking up AAAA for stokkie.net - the domain's nameservers may be malfunctioning
looking on google for the exact same error i found this thread :
Acme: error: 400 :: urn:ietf:params:acme:error:dns :: DNS problem: SERVF .
According the answer provided there, it seems to be the case that
the DNSSEC was broken, in above example.
As i don't have DNSSEC, what are the exact DNS requirements of acme for ones
DNS configuration ? a Special TXT for the acme server ?
Here are my dns and website details :