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Activités suspectes dans un serveur dédié (Attaques SYN TCP?)


fritz2cat
03/07/2016, 16h29
Quelle est ta config DNS ? Que contient ton resolv.conf ?

$ host 192.42.93.30
30.93.42.192.in-addr.arpa domain name pointer g.gtld-servers.net.

$ host 208.78.71.27
27.71.78.208.in-addr.arpa domain name pointer ns3.p27.dynect.net.

buddy
03/07/2016, 12h32
un seul sujet c'est mieux .. https://forum.ovh.com/showthread.php...r-infra-ovh%29

Kr118218
03/07/2016, 11h53
Bonjour,

depuis quelques jours j'ai énormément d'erreurs dans mon syslog:

Code:
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 204.13.250.27#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 208.78.71.27#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 208.78.71.27#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 204.13.251.27#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 204.13.251.27#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.5.6.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.5.6.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.33.14.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.33.14.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.26.92.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.26.92.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.31.80.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.31.80.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.12.94.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.12.94.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.35.51.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.35.51.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.42.93.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.42.93.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.54.112.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.54.112.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.43.172.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.43.172.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.48.79.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.48.79.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.52.178.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.52.178.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.41.162.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.41.162.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.55.83.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.55.83.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 2001:503:a83e::2:30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 2001:503:a83e::2:30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 2001:503:231d::2:30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 2001:503:231d::2:30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.5.6.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.5.6.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.33.14.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.33.14.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.26.92.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.26.92.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.31.80.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.31.80.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.12.94.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.12.94.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.35.51.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.35.51.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.42.93.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.42.93.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.54.112.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.54.112.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.43.172.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.43.172.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.48.79.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.48.79.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.52.178.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.52.178.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.41.162.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.41.162.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.55.83.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.55.83.30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 2001:503:a83e::2:30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 2001:503:a83e::2:30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 2001:503:231d::2:30#53
Jul  3 11:43:49 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 2001:503:231d::2:30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 208.78.70.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 208.78.70.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 204.13.250.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 204.13.250.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 208.78.71.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 208.78.71.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 204.13.251.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 204.13.251.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 208.78.70.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 208.78.70.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 204.13.250.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 204.13.250.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 208.78.71.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 208.78.71.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/A/IN': 204.13.251.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com/AAAA/IN': 204.13.251.27#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.5.6.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.5.6.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.33.14.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.33.14.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.26.92.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.26.92.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.31.80.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.31.80.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.12.94.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.12.94.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.35.51.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.35.51.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.42.93.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.42.93.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.54.112.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.54.112.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.43.172.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.43.172.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.48.79.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.48.79.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.52.178.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.52.178.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.41.162.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.41.162.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.55.83.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.55.83.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 2001:503:a83e::2:30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 2001:503:a83e::2:30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 2001:503:231d::2:30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 2001:503:231d::2:30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.5.6.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.5.6.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.33.14.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.33.14.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.26.92.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.26.92.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.31.80.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.31.80.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.12.94.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.12.94.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.35.51.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.35.51.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.42.93.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.42.93.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.54.112.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.54.112.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.43.172.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.43.172.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.48.79.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.48.79.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.52.178.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.52.178.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.41.162.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.41.162.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 192.55.83.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 192.55.83.30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 2001:503:a83e::2:30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 2001:503:a83e::2:30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/AAAA/IN': 2001:503:231d::2:30#53
Jul  3 11:43:50 ns3268116 named[4260]: error (host unreachable) resolving 'daisy.ubuntu.com.ovh.net/A/IN': 2001:503:231d::2:30#53

ou

Code:
Jul  3 11:42:20 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=10722 DF PROTO=TCP SPT=32704 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:21 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=10723 DF PROTO=TCP SPT=32704 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:23 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=10724 DF PROTO=TCP SPT=32704 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:27 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=10725 DF PROTO=TCP SPT=32704 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:33 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36778 DF PROTO=TCP SPT=28321 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:34 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36779 DF PROTO=TCP SPT=28321 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:35 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=10726 DF PROTO=TCP SPT=32704 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:36 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36780 DF PROTO=TCP SPT=28321 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:40 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36781 DF PROTO=TCP SPT=28321 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:44 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36032 DF PROTO=TCP SPT=52096 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul  3 11:42:45 ns3268116 kernel: [UFW BLOCK] IN=eth0 OUT= MAC=4c:72:b9:42:f7:f9:1c:e6:c7:52:af:80:08:00 SRC=77.154.202.176 DST=37.59.10.99 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=36033 DF PROTO=TCP SPT=52096 DPT=5222 WINDOW=65535 RES=0x00 SYN URGP=0
ou encore

Code:
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:500:2d::d#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:500:2d::d#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.5.5.241#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 192.5.5.241#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:500:1::803f:235#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:500:1::803f:235#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.36.148.17#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 192.36.148.17#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:503:ba3e::2:30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:503:ba3e::2:30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 193.0.14.129#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 193.0.14.129#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.112.36.4#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 192.112.36.4#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:503:c27::2:30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:503:c27::2:30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 199.7.83.42#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 199.7.83.42#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:dc3::35#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 192.228.79.201#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:dc3::35#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 192.33.4.12#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.228.79.201#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 192.203.230.10#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.33.4.12#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 199.7.91.13#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.203.230.10#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:500:2f::f#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 199.7.91.13#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 128.63.2.53#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:7fe::53#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:500:2f::f#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 198.41.0.4#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 128.63.2.53#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:7fd::1#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:7fe::53#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 192.58.128.30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 198.41.0.4#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 2001:500:3::42#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:7fd::1#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving './NS/IN': 202.12.27.33#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.58.128.30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:500:3::42#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 202.12.27.33#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:500:2d::d#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.5.5.241#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:500:1::803f:235#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.36.148.17#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:503:ba3e::2:30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 193.0.14.129#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.112.36.4#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:503:c27::2:30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 199.7.83.42#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:dc3::35#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.228.79.201#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.33.4.12#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.203.230.10#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 199.7.91.13#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:500:2f::f#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 128.63.2.53#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:7fe::53#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 198.41.0.4#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:7fd::1#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 192.58.128.30#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 2001:500:3::42#53
Jul  3 11:42:05 ns3268116 named[4260]: error (host unreachable) resolving '179.141.155.188.in-addr.arpa/PTR/IN': 202.12.27.33#53
Ça signifie quoi? J'ai bloqué tout le trafic sortant avec UFW pour éviter le problème, mais ça ne suffit pas à calmer la chose.

J'ai installé la dernière version rkhunter, puis fait un contrôle général. J'ai ensuite supprimé tous les fichiers qu'il trouvait suspect, mais rien n'a changé.

Depuis que j'ai remarqué le problème, j'ai désactivé (déconnexion de la base de données) tous les vieux sites web qui pouvaient poser des problèmes de sécurité, mais là encore ça n'a rien changé. Est-ce que le fait de les désactiver peut résoudre le problème? Ou il faut carrément les supprimer complètement? Est-ce que ça peut suffire de les compresser avec TAR?

Est-ce que vous avez des suggestions pour résoudre le problème?

Cordiales salutations,

merci