En mi configuración, un servidor Bind9 local reenvía solicitudes de DNS a Cloudflare (1.1.1.1) con DNSSEC activado. Mi syslog muestra muchas entradas de tiempo de espera para nombres de dominio conocidos (como adobe.com):
Apr 28 19:39:01 myserver named[756]: timed out resolving 'adobeid-na1.services.adobe.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:39:03 myserver named[756]: timed out resolving 'adobelogin.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:39:04 myserver named[756]: timed out resolving 'www.adobe.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:39:04 myserver named[756]: timed out resolving 'ims-na1.adobelogin.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:39:04 myserver named[756]: timed out resolving 'sstats.adobe.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:39:04 myserver named[756]: timed out resolving 'auth.services.adobe.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:39:04 myserver named[756]: timed out resolving 'geo2.adobe.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:39:05 myserver named[756]: timed out resolving 'images-tv.adobe.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:42:46 myserver named[756]: timed out resolving 'adobeid-na1.services.adobe.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:42:46 myserver named[756]: timed out resolving 'ims-na1.adobelogin.com/HTTPS/IN': 1.1.1.1#53
Apr 28 19:42:46 myserver named[756]: timed out resolving 'auth.services.adobe.com/HTTPS/IN': 1.1.1.1#53
pero los nombres de dominio se resuelven correctamente con nslookup. ¿Que está sucediendo aquí?
Gracias, enero