Hello
How can I prevent these connections and this flood on the dns server :
For example :
**Unmatched Entries**
connection refused resolving 'software.virtualmin.com/AAAA/IN': 208.113.149.117#53: 23 Time(s)
network unreachable resolving '158.195.174.88.in-addr.arpa/PTR/IN': 2001:610:240:0:53::193#53: 1 Time(s)
network unreachable resolving '171.144.89.143.in-addr.arpa/PTR/IN': 2001:7fd::1#53: 1 Time(s)
network unreachable resolving '179.212.127.82.in-addr.arpa/PTR/IN': 2001:500:2f::f#53: 1 Time(s)
network unreachable resolving '179.212.127.82.in-addr.arpa/PTR/IN': 2001:610:240:0:53::3#53: 1 Time(s)
network unreachable resolving '179.212.127.82.in-addr.arpa/PTR/IN': 2001:660:3006:1::1:1#53: 1 Time(s)
network unreachable resolving '179.212.127.82.in-addr.arpa/PTR/IN': 2001:dc0:1:0:4777::140#53: 1 Time(s)
network unreachable resolving '202.189.251.213.zen.spamhaus.org/A/IN': 2001:7b8:3:1f:0:2:53:2#53: 1 Time(s)
network unreachable resolving '209.220.85.209.in-addr.arpa/PTR/IN': 2001:dc3::35#53: 1 Time(s)
network unreachable resolving '23.60.129.61.in-addr.arpa/PTR/IN': 2001:500:1::803f:235#53: 1 Time(s)
network unreachable resolving '23.60.129.61.in-addr.arpa/PTR/IN': 2001:dc0:1:0:4777::131#53: 1 Time(s)
network unreachable resolving '23.60.129.61.in-addr.arpa/PTR/IN': 2001:dc0:2001:0:4608::25#53: 1 Time(s)
network unreachable resolving '23.60.129.61.in-addr.arpa/PTR/IN': 2001:dc0:4001:1:0:1836:0:140#53: 1 Time(s)
network unreachable resolving '42.189.251.213.iadb.isipp.com/A/IN': 2001:470:1:41:a800:ff:fe50:3143#53: 1 Time(s)
network unreachable resolving '42.189.251.213.in-addr.arpa/PTR/IN': 2001:dc0:2001:a:4608::59#53: 1 Time(s)
network unreachable resolving '42.mail-out.ovh.net/A/IN': 2001:41d0:1:4a86::1#53: 1 Time(s)
network unreachable resolving '42.mail-out.ovh.net/TXT/IN': 2001:41d0:1:1986::1#53: 1 Time(s)
network unreachable resolving 'NS3.cuhk.edu.hk/A/IN': 2001:503:ba3e::2:30#53: 1 Time(s)
network unreachable resolving 'NS3.cuhk.edu.hk/A/IN': 2001:503:c27::2:30#53: 1 Time(s)
network unreachable resolving 'NS3.cuhk.edu.hk/AAAA/IN': 2001:503:ba3e::2:30#53: 1 Time(s)
network unreachable resolving 'NS3.cuhk.edu.hk/AAAA/IN': 2001:503:c27::2:30#53: 1 Time(s)
network unreachable resolving 'SUNIC.SUNET.SE/A/IN': 2001:6b0:7::2#53: 1 Time(s)
Suggestions are welcome Thank G.F.
If your server isn't allowing queries to be performed by anyone on the Net (ie, port 53 UDP isn't externally visible, or recursive queries are disabled) -- I'm not really sure I'd worry too much about those if things are otherwise working for you.
However, in digging around on the Net a bit, some folks suggest launching BIND with the -4 parameter to force use of IPv4, which can apparently reduce some of those messages. -Eric