Question about "Bogus LOOPBACK" message
Kevin Darcy
kcd at daimlerchrysler.com
Thu Dec 6 22:40:33 UTC 2001
My guess is that some nameserver gave you a referral to a nameserver that
resolves to 127.0.0.1. This is obviously bogus. Since you have obscured the
actual domain names involved, it's impossible to tell why you may have received
such a referral, or what you might be able to do about it.
- Kevin
Takahiro Sato wrote:
> Hello,
>
> I am in trouble with DNS log message(syslog) of internal DNS,
>
> "sysquery : query(SOME-DOMAIN-NAME) Bogus LOOPBACK A RR (localhost:127.0.0.1)
> learn (A=localhost:NS=A.B.C.D)"
>
> (*) A.B.C.D is External DNS server address.
>
> If anyone have any idea, please teach me about this.
>
> Thanks!
>
> This illustrates my DNS server environment.
>
> THE INTERNET
> / \
> / \
> / \
> |---------------| forward |---------------|
> | Internal DNS |------------>| External DNS |
> | (foo.prv) | root NS | (bar.xyz) |
> | |------------>| |
> |---------------| |---------------|
> |
> | private network
> |
> ---------
> |Client |
> ---------
>
> Internal DNS
> Multi-homed DNS(it is connected to private network
> and INTERNET). It is authority of foo.prv that is
> private network zone. Query of the name other than
> "foo.prv" is forwarded to external DNS. If its
> forwarded (recursive) query is not answered, then
> internal DNS sends (non-recursive) query to external
> DNS(as root nameserver).
>
> External DNS
> This nameserver is authority of "bar.xyz.". It's
> connected to INTERNET.
>
> Internal DNS configuration like this,
>
> options {
> forwarders {
> A.B.C.D; // it's External DNS's IP Address;
> };
> };
>
> zone "foo.bar" in {
> type master;
> file "db.foo.bar"; // private network
> };
>
> zone "10.in-addr.arpa" in {
> type master;
> file "db.10";
> };
>
> zone "." in {
> type hint;
> file "root.cache"; // In "root.cache", External DNS
> // is specified as ROOT nameserver.
> };
>
> ---
> E-mail : t_sato at rbec.co.jp
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