> Hi,
> We hare having a weird problems. A domain lookup for a particilar
> domain
> Produces different results dependant on whether or not the +trace flag
> is used.
>
> Any ideas?
>
> [root@monet1 etc]# named -v
> BIND 9.2.4


First thing I would do is upgrade, 9.2.4 is old and has
lots of bugs. If that fails then I would take a tcpdump
and see if ypu are getting replies to the queries named is
putting out.

The delegation appears to be fine.

The remote end doesn't appear to block packets from port 53.

I'm worried a bit about your NAT box. Some NAT's are known
to just start dropping replies. The tcpdump above should
tell you if that is the problem.

Mark

> See dig outputs below:
>
> ################################################## ###############
> # 1st dig run
> ################################################## ###############
> [root@monet1 etc]# rndc flush
> [root@monet1 etc]# dig @10.10.10.20 heartofphilosophy.com
>
> ; <<>> DiG 9.2.4 <<>> @10.10.10.20 heartofphilosophy.com
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 2935
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;heartofphilosophy.com. IN A
>
> ;; Query time: 358 msec
> ;; SERVER: 10.10.10.20#53(10.10.10.20)
> ;; WHEN: Thu Feb 8 10:42:47 2007
> ;; MSG SIZE rcvd: 39
>
> ################################################## ###############
> # 2nd dig run
> ################################################## ###############
> [root@monet1 etc]# rndc flush
> [root@monet1 etc]# dig +trace @10.10.10.20 heartofphilosophy.com
>
> ; <<>> DiG 9.2.4 <<>> +trace @10.10.10.20 heartofphilosophy.com
> ; (1 server found)
> ;; global options: printcmd
> . 518400 IN NS J.ROOT-SERVERS.NET.
> . 518400 IN NS K.ROOT-SERVERS.NET.
> . 518400 IN NS L.ROOT-SERVERS.NET.
> . 518400 IN NS M.ROOT-SERVERS.NET.
> . 518400 IN NS A.ROOT-SERVERS.NET.
> . 518400 IN NS B.ROOT-SERVERS.NET.
> . 518400 IN NS C.ROOT-SERVERS.NET.
> . 518400 IN NS D.ROOT-SERVERS.NET.
> . 518400 IN NS E.ROOT-SERVERS.NET.
> . 518400 IN NS F.ROOT-SERVERS.NET.
> . 518400 IN NS G.ROOT-SERVERS.NET.
> . 518400 IN NS H.ROOT-SERVERS.NET.
> . 518400 IN NS I.ROOT-SERVERS.NET.
> ;; Received 228 bytes from 10.10.10.20#53(10.10.10.20) in 1 ms
>
> com. 172800 IN NS A.GTLD-SERVERS.NET.
> com. 172800 IN NS G.GTLD-SERVERS.NET.
> com. 172800 IN NS H.GTLD-SERVERS.NET.
> com. 172800 IN NS C.GTLD-SERVERS.NET.
> com. 172800 IN NS I.GTLD-SERVERS.NET.
> com. 172800 IN NS B.GTLD-SERVERS.NET.
> com. 172800 IN NS D.GTLD-SERVERS.NET.
> com. 172800 IN NS L.GTLD-SERVERS.NET.
> com. 172800 IN NS F.GTLD-SERVERS.NET.
> com. 172800 IN NS J.GTLD-SERVERS.NET.
> com. 172800 IN NS K.GTLD-SERVERS.NET.
> com. 172800 IN NS E.GTLD-SERVERS.NET.
> com. 172800 IN NS M.GTLD-SERVERS.NET.
> ;; Received 511 bytes from 192.58.128.30#53(J.ROOT-SERVERS.NET) in 310
> ms
>
> heartofphilosophy.com. 172800 IN NS ns1.alexsrv30.com.
> heartofphilosophy.com. 172800 IN NS ns2.alexsrv30.com.
> ;; Received 117 bytes from 192.5.6.30#53(A.GTLD-SERVERS.NET) in 1004 ms
>
> heartofphilosophy.com. 14400 IN A 75.126.34.72
> heartofphilosophy.com. 86400 IN NS ns1.alexsrv30.com.
> heartofphilosophy.com. 86400 IN NS ns2.alexsrv30.com.
> ;; Received 133 bytes from 75.126.27.219#53(ns1.alexsrv30.com) in 201 ms
>
>
> Adam Clark
> Network Administrator
>
> National Gallery of Victoria
> 180 St Kilda Road Melbourne Vic 3004 Australia
> Telephone: +61 3 8620 2369
> Fax: +61 3 8620 2565
> www.ngv.vic.gov.au
>
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>

--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@isc.org