[CentOS-de] Wer od. was außer einem Mailserver macht DNS-Requests z. z.B. dnsbl.sorbs.net

[Walter H.]

Hallo,

jeden Tag habe ich in meinem Caching-DNS (Resolver) folgendes im
Logwatch-Mail
(mehr oder weniger solcher Einträge)

error (unexpected RCODE REFUSED) resolving
'12.134.59.64.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'137.165.71.96.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'138.136.59.64.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'142.14.188.209.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'155.60.236.81.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'169.215.85.209.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'174.44.70.70.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 2 Time(s)
error (unexpected RCODE REFUSED) resolving
'187.199.179.77.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'2.181.132.209.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 9 Time(s)
error (unexpected RCODE REFUSED) resolving
'200.59.165.142.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'210.151.1.194.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'223.143.194.185.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 12 Time(s)
error (unexpected RCODE REFUSED) resolving
'232.145.249.72.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'25.141.235.209.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'26.15.123.68.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'3.11.211.140.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'64.216.149.109.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE REFUSED) resolving
'9.134.59.64.dnsbl.sorbs.net/A/IN': 87.106.246.125#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'12.134.59.64.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'13.134.59.64.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'137.165.71.96.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'156.93.37.173.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'174.200.9.192.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'174.44.70.70.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'175.31.37.50.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'187.199.179.77.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'2.181.132.209.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 7 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'210.151.1.194.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'223.143.194.185.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 10 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'236.80.84.135.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'3.92.72.195.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'36.200.9.192.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'53.79.148.198.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 2 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'64.216.149.109.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving
'80.86.37.173.dnsbl.sorbs.net/A/IN': 174.36.198.232#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'primary.lp.se/A/IN':
192.36.115.53#53: 2 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'primary.lp.se/A/IN':
2001:470:df3c::53#53: 2 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'primary.lp.se/A/IN':
2a00:16d8:2:300:216:3cff:fea1:8ed5#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'primary.lp.se/A/IN':
91.123.201.115#53: 3 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'primary.lp.se/AAAA/IN':
2a00:16d8:2:300:216:3cff:fea1:8ed5#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'secondary.lp.se/A/IN':
192.36.115.53#53: 2 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'secondary.lp.se/A/IN':
2001:470:df3c::53#53: 3 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'secondary.lp.se/A/IN':
2a00:16d8:2:300:216:3cff:fea1:8ed5#53: 2 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'secondary.lp.se/A/IN':
91.123.201.115#53: 3 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'secondary.lp.se/AAAA/IN':
192.36.115.53#53: 1 Time(s)
error (unexpected RCODE SERVFAIL) resolving 'secondary.lp.se/AAAA/IN':
2a00:16d8:2:300:216:3cff:fea1:8ed5#53: 1 Time(s)

meine VMs mit Linux (CentOS) haben zwar einen postfix laufen, aber keiner
bewußt eine DNS blacklist configuriert;
macht das der Mailclient, oder gar der Browser, wer verursacht diese
Abfragen, welche anscheinend aus welchen Gründen auch immer scheitern?

Danke,
Walter