[Q]unapproved AXFR from XXXX .... (not zone top)

[Keejin Mo]

What is the log below?

     Apr 19 13:50:43 intns named[13501]: unapproved AXFR from [165.243.17.15].48079
     for "digital.lge.co.kr" (not zone top)

I have three chained DNS Server.
One is above log producing server (Let it A) which is the slave server
for lge.co.kr domain.

Another is the server has SOA for lge.co.kr domain and gives a delegation for
digital.lge.co.kr sub-domain. (Let it B)

The last one is the server delegated for digital.lge.co.kr sub-domain. (Let it C)

I can look the host "www.digital.lge.co.kr" up to IP Address correctly but couldn't
find SOA for digital.lge.co.kr correctly.

> www.digital.lge.co.kr
Server:  intns.lg.co.kr
Address:  165.243.17.15

Non-authoritative answer:
Name:    www.digital.lge.co.kr
Address:  211.219.90.202

>

> digital.lge.co.kr
Server:  intns.lg.co.kr
Address:  165.243.17.15

Authoritative answers can be found from:
lge.co.kr
        origin = prmns.lg.co.kr
        mail addr = root.prmns.lg.co.kr
        serial = 2001041701
        refresh = 86400 (1D)
        retry   = 3600 (1H)
        expire  = 604800 (1W)
        minimum ttl = 3600 (1H)
>

Why it said the SOA server is not digital.lge.co.kr (C) but prmns.lg.co.kr ?
prmns.lg.co.kr is the forwarder server for the server "A"

Please help me.