Problem resolving a domain on my cache server. (part II)

Hi list,

Some months ago I asked here about a domain I can=B4t resolve on my =
cache server because of a firewall on the dns that hosts this domain =
(they were blocking everyone doing queries using source udp port bellow =
53). Today I will ask again about one domain I can=B4t resolve on my =
cache server.=20

To make sure the problem is not firewall issue again I tested it using =
DIG and setting the source ip/port exactly to what named process is =
using to make queries. I receive answer without problems.

Actually I have problem to resolve just one hostname -> =
www.redecard.com.br. When I startup my cache server process and make one =
query to it I receive the answer from my server. But after some time =
running (and memory cache getting bigger) only this domain stops =
working. I=B4m not owner of domain redecard.com.br but the problem is =
some of my cache clients are complaining that they could not resolve =
this domain using my cache server. I couldn't understand why and how =
this is happening. I tried some things trying to fix it. Doing rndc =
flusname for some times I can resolve this domain but some times rndc =
flushname makes no difference.

Do someone have a clue on how to trace this kind of problem? Is the =
problem my cache or the problem is on a mistake at redecard.com.br dns =
servers?

Bellow I will paste my named configure line, version and named.conf. I =
would appreciate any help on this.=20

Thanks

Fabiano


Configure line:

../configure --enable-threads

Version:

/iG/named/sbin/named -v
BIND 9.3.1rc1

Named.conf

include "/etc/rndc.key";
controls {
inet 127.0.0.1 allow { localhost; } keys { rndc-key; };
};
options {
directory "/var/named";
pid-file "named.pid";
allow-transfer { none; } ;
statistics-file "named.stats";
dump-file "named.db";
listen-on { 127.0.0.1; };
auth-nxdomain no;
tcp-clients 1000;
recursive-clients 10000;
};

logging {
channel query_logging {
file "query.log"
versions 6 size 100M;
print-time yes;
};
channel my_log {
file "my.log"
versions 6 size 100M;
print-time yes;
};
category queries {
query_logging ;
};
category lame-servers {
null ;
};
category client {
my_log;
};
};

zone "." {
type hint;
file "named.cache";
};

zone "0.0.127.in-addr.arpa" {
type master;
file "localhost.rev";
notify no;
};

zone "localhost" {
type master;
file "localhost.zone";
};