La bufera di attacchi al DNS è iniziata ?

[Sam9999]

Negli ultimi due riavvi ho notato avvisi di questo tipo.... non bloccanti del serverino ma....

Codice: Seleziona tutto

Feb 22 23:51:50 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:51 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:52 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:53 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:54 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:54 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:54 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:54 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:54 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:55 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:55 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:55 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:55 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:56 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:56 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:57 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:51:57 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:08 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:15 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:21 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:21 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:21 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:22 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:22 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:22 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:22 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:23 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:24 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:34 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:35 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:35 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:35 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:35 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:35 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:36 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:36 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:36 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:37 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:37 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:37 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:38 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:38 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:38 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:38 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:38 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:38 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:38 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:40 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:41 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:42 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:44 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:44 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:46 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:47 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:47 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:50 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U
Feb 22 23:52:50 locale-c systemd-resolved[15186]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level U

[Stealth]

Ogni tanto ne leggo anche io qualche riga nei miei log, ma 2 o 3 non frequentemente e mai così tante
ciao

[Pike]

Il server DNS di quel server è contattabile dall'esterno?
Se sì, è necessario che lo sia?

[Sam9999]

Quel server non ha un server DNS.... come DNS uso quelli di altri provider (di solito del fornitore dominio) e creo le zone sul server ip.