# DNS problem : NXDOMAIN looking up TXT **URL:** \ **Category:** Aide (en français)\ **Created:** [January 12, 2022, 8:46am UTC](https://community.letsencrypt.org/t/dns-problem-nxdomain-looking-up-txt/169545 "2022-01-12T08:46:34Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![franckA](https://avatars.discourse-cdn.com/v4/letter/f/b5e925/32.png) [@franckA](https://community.letsencrypt.org/u/franckA)\ **Post date:** [January 12, 2022, 8:46am UTC](https://community.letsencrypt.org/t/dns-problem-nxdomain-looking-up-txt/169545/1 "2022-01-12T08:46:34Z")
Bonjour, je n'arrive plus a récuperer mes certificats. je suis sur un nas asustore avec Docker et Swag. l'erreur quand je lance swag est 🙂 duckdns validation is selected the resulting certificate will only cover the subdomains due to a limitation of duckdns, so it is advised to set the root location to use [www.subdomain.duckdns.org](http://www.subdomain.duckdns.org) Generating new certificate Saving debug log to /var/log/letsencrypt/letsencrypt.log Requesting a certificate for \*.duckdns.org Hook '--manual-auth-hook' for [duckdns.org](http://duckdns.org) ran with output: KOsleeping 60 Hook '--manual-auth-hook' for [duckdns.org](http://duckdns.org) ran with error output: % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0 100 2 0 2 0 0 5 0 --:--:-- --:--:-- --:--:-- 5 Certbot failed to authenticate some domains (authenticator: manual). The Certificate Authority reported these problems: Domain: [duckdns.org](http://duckdns.org) Type: dns Detail: DNS problem: NXDOMAIN looking up TXT for \_acme-challenge.duckdns.org - check that a DNS record exists for this domain Hint: The Certificate Authority failed to verify the DNS TXT records created by the --manual-auth-hook. Ensure that this hook is functioning correctly and that it waits a sufficient duration of time for DNS propagation. Refer to "certbot --help manual" and the Certbot User Guide. Some challenges have failed. Ask for help or search for solutions at [https://community.letsencrypt.org](https://community.letsencrypt.org). See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details. ERROR: Cert does not exist! Please see the validation error above. Make sure your DUCKDNSTOKEN is correct. Je peux lire des réponses en Anglais : oui Mon nom de domaine est : [famiardnas.duckdns.org](http://famiardnas.duckdns.org) J’ai exécuté cette commande : Elle a produit cette sortie : Mon serveur Web est (inclure la version) : Le système d’exploitation sur lequel mon serveur Web s’exécute est (version incluse) : Mon hébergeur, le cas échéant, est : Je peux me connecter à un shell root sur ma machine (oui ou non, ou je ne sais pas) : oui J’utilise un panneau de configuration pour gérer mon site (non, ou fournit le nom et la version du panneau de configuration) : non En vous remerciant pour votre aide. Cordialement FranckA ---
**Author:** ![rg305](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/rg305/32/91314_2.png) [@rg305](https://community.letsencrypt.org/u/rg305)\ **Post date:** [January 12, 2022, 7:13pm UTC](https://community.letsencrypt.org/t/dns-problem-nxdomain-looking-up-txt/169545/2 "2022-01-12T19:13:22Z")
> [@franckA](#): > > Requesting a certificate for \*.duckdns.org Unless you actually own the domain "`duckdns.org`", such a requested cert will surely fail. ---
**Author:** ![franckA](https://avatars.discourse-cdn.com/v4/letter/f/b5e925/32.png) [@franckA](https://community.letsencrypt.org/u/franckA)\ **Post date:** [January 13, 2022, 8:30am UTC](https://community.letsencrypt.org/t/dns-problem-nxdomain-looking-up-txt/169545/3 "2022-01-13T08:30:57Z")
Thank you for your answer. I must replace \* with my domain "famiardnas" in the conf file. Do you know which file? cordially Franck