My Debian-server acts as a DNS server for the domain I own. Since my ISP also allocated me a sub-domain, my DNS server also has a few entries for that host. In other words, I have /etc/bind/db.domain-i-own.tld
with a few entries and /etc/bind/db.192
, also with a few entries. And my named.conf.local
has
zone "domain-i-own.tld" {
type master;
file "/etc/bind/db.domain-i-own.tld";
};
zone "<my-public-ip>.in-addr.arpa" {
type master;
notify no;
file "/etc/bind/db.192";
};
A couple of days ago, the following appeared in my logging:
client 137.xxx.xxx.xxx#xxxxx: bad zone transfer request: 'my-isp.tld/IN': non-authoritative zone (NOTAUTH)
I don't really understand what happened. Did somebody try to trick my DNS-server into believing it should become the root DNS-server for the whole domain of my ISP (so not only my subdomain)? Should I inform my ISP about that?