Ricevo molti di questi messaggi su /var/log/syslog sulla mia nuova installazione di Ubuntu 18.04 su una virtualbox su un host Windows 10. Li stavo ricevendo sulla mia precedente installazione di Ubuntu sulla stessa macchina e ho provato tutti i tipi di soluzioni che ho trovato su Internet (come la sostituzione risolta con bind9) senza fortuna, ad es. bind9 ha avuto problemi a risolvere gli host. Ciò rende la navigazione e qualsiasi altro software che utilizza Internet lento.
Nota che il problema si verifica con 8.8.8.8 e con un server DNS interno su 10.255.255.0.
Sto usando l'ultima scatola virtuale per eseguire il mio ultimo Ubuntu 18.04. Qualche soluzione per questo? Finora ho provato:
- sostituzione di systemd-resolved con bind9 (bind9 ha riscontrato problemi di risoluzione e la risoluzione DNS era lenta)
- rimuovere il collegamento simbolico /etc/resolved.conf ei valori di hardcoding in quel file
-
impostare la risoluzione DNS per utilizzare 8.8.8.8 (stesso problema)
Sep 20 11:23:21 kkpc systemd-resolved[553]: Using degraded feature set (UDP) for DNS server 10.255.255.0. Sep 20 11:23:26 kkpc systemd-resolved[553]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP. Sep 20 11:23:30 kkpc systemd-resolved[553]: Using degraded feature set (TCP) for DNS server 10.255.255.0. Sep 20 11:23:35 kkpc systemd-resolved[553]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP. Sep 20 11:23:40 kkpc systemd-resolved[553]: Using degraded feature set (UDP) for DNS server 10.255.255.0. Sep 20 11:23:40 kkpc systemd-resolved[553]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP. Sep 20 11:23:48 kkpc systemd-resolved[553]: message repeated 3 times: [ Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.] Sep 20 11:23:51 kkpc systemd-resolved[553]: Using degraded feature set (TCP) for DNS server 10.255.255.0. Sep 20 11:23:55 kkpc systemd-resolved[553]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP. Sep 20 11:24:02 kkpc systemd-resolved[553]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP. Sep 20 11:24:05 kkpc systemd-resolved[553]: Using degraded feature set (UDP) for DNS server 10.255.255.0. Sep 20 11:24:05 kkpc systemd-resolved[553]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP. Sep 20 11:24:15 kkpc systemd-resolved[553]: message repeated 2 times: [ Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.] Sep 20 11:24:21 kkpc systemd-resolved[553]: Using degraded feature set (TCP) for DNS server 10.255.255.0. Sep 20 11:24:25 kkpc systemd-resolved[553]: Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP. Sep 20 11:24:56 kkpc systemd-resolved[553]: message repeated 6 times: [ Server returned error NXDOMAIN, mitigating potential DNS violation DVE-2018-0001, retrying transaction with reduced feature level UDP.]