Cache problem
Wael Shahin
wael.shahin at gmail.com
Tue Jan 30 15:22:26 UTC 2007
Alright,
I think i should always trace the RRs this way so I know what is happening
Thank you Mark
----- Original Message -----
From: "Mark Andrews" <Mark_Andrews at isc.org>
To: "Wael Shahin" <wael.shahin at gmail.com>
Cc: <bind-users at isc.org>
Sent: Tuesday, January 30, 2007 4:52 PM
Subject: Re: Cache problem
>
>> Dear List,
>>
>> I have a problem with my DNS cache which I can’t know exactly what it is.
>>
>> Today a record could not be resolved and when I issued the command “rndc
>> flush” the server started resolving again
>>
>> Here is the record I was trying to resolve
>>
>> ; <<>> DiG 9.3.3rc2 <<>> bluepages.com.sa
>>
>> ;; global options: printcmd
>>
>> ;; Got answer:
>>
>> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 936
>>
>> ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
>>
>>
>>
>> ;; QUESTION SECTION:
>>
>> ;bluepages.com.sa. IN A
>>
>>
>>
>> ;; ANSWER SECTION:
>>
>> bluepages.com.sa. 85233 IN A 207.106.22.33
>>
>>
>>
>> ;; Query time: 1 msec
>>
>> ;; SERVER: 127.0.0.1#53(127.0.0.1)
>>
>> ;; WHEN: Tue Jan 30 12:42:37 2007
>>
>> ;; MSG SIZE rcvd: 50
>>
>>
>>
>> This is happening with my two servers and the two servers are described
>> below
>>
>>
>>
>> Master:
>>
>> OS: FC5
>>
>> BIND Version: 9.3.3rc2
>>
>> -------
>>
>> Named.conf
>>
>> -------------
>>
>> options {
>>
>> directory "/var/named";
>>
>> dump-file "/var/named/data/cache_dump.db";
>>
>> statistics-file "/var/named/data/named_stats.txt";
>>
>> version "Get Lost";
>>
>> allow-query { any; };
>>
>> allow-recursion { localhost; trusted; };
>>
>> minimal-responses yes;
>>
>> blackhole { badguys; };
>>
>> notify yes;
>>
>> max-ncache-ttl 1;
>>
>> allow-transfer { secondaries; };
>>
>> also-notify {192.168.1.101; 192.168.10.9;}; // all zones
>>
>> allow-notify { secondaries; };
>>
>> recursive-clients 30000;
>>
>> };
>>
>> ---------
>>
>> Slave:
>>
>> OS: RH AS 4
>>
>> BIND Version: 9.2.4
>>
>>
>>
>> Named.conf
>>
>> options {
>>
>> directory "/var/named"; // Working directory
>>
>> pid-file "named.pid" ;
>>
>> blackhole { bogusnets; };
>>
>> version "Get Lost";
>>
>> allow-query { any; };
>>
>> allow-recursion { our-nets; localhost; };
>>
>> minimal-responses yes;
>>
>> notify no;
>>
>> max-ncache-ttl 1;
>>
>> recursive-clients 300000;
>>
>> };
>>
>>
>>
>>
>>
>> I have posted something like this earlier and it was solved by setting
>> the
>> ncache to 1 now i think it is back again, however the named -4 didn’t
>> really
>> help doing anything
>>
>>
>>
>> I have bind V8 as well and it never faces this problem
>>
>>
>>
>> Do I need to send more information?
>>
>>
>>
>> Thank you
>
> ns1.egysol.com and ns2.egysol.com don't exist according to
> the servers for egysol.com. There are glue A records in the
> COM zone for them.
>
> Complain to the administrators of the egysol.com zone that
> there are missing records address records for ns1.egysol.com
> and ns2.egysol.com.
>
> Note when you do query using the glue records you get a
> different set of nameservers for bluepages.com.sa so the
> delegation for bluepages.com.sa also needs to be fixed.
>
> Until these issues are addressed you will continue to
> have problems resolving bluepages.com.sa.
>
> Atleast ns1.rapidns.com and ns2.rapidns.com exist.
>
> Mark
>
> % dig9 +trace bluepages.com.sa
>
> ; <<>> DiG 9.5.0a1 <<>> +trace bluepages.com.sa
> ;; global options: printcmd
> . 319188 IN NS B.ROOT-SERVERS.NET.
> . 319188 IN NS K.ROOT-SERVERS.NET.
> . 319188 IN NS H.ROOT-SERVERS.NET.
> . 319188 IN NS A.ROOT-SERVERS.NET.
> . 319188 IN NS I.ROOT-SERVERS.NET.
> . 319188 IN NS M.ROOT-SERVERS.NET.
> . 319188 IN NS F.ROOT-SERVERS.NET.
> . 319188 IN NS G.ROOT-SERVERS.NET.
> . 319188 IN NS E.ROOT-SERVERS.NET.
> . 319188 IN NS L.ROOT-SERVERS.NET.
> . 319188 IN NS J.ROOT-SERVERS.NET.
> . 319188 IN NS D.ROOT-SERVERS.NET.
> . 319188 IN NS C.ROOT-SERVERS.NET.
> ;; Received 480 bytes from 127.0.0.1#53(127.0.0.1) in 13 ms
>
> sa. 172800 IN NS NS.NIXU.NET.
> sa. 172800 IN NS NS1.ISU.NET.sa.
> sa. 172800 IN NS NS1.NIC.NET.sa.
> sa. 172800 IN NS NS2.NIC.NET.sa.
> sa. 172800 IN NS RIP.PSG.COM.
> ;; Received 230 bytes from 2001:dc3::35#53(M.ROOT-SERVERS.NET) in 402 ms
>
> bluepages.com.sa. 172800 IN NS ns2.egysol.com.
> bluepages.com.sa. 172800 IN NS ns1.egysol.com.
> ;; Received 80 bytes from 147.28.0.39#53(RIP.PSG.COM) in 3955 ms
>
> dig9: couldn't get address for 'ns1.egysol.com': not found
> %
>
> % dig ns egysol.com @a.gtld-servers.net
>
> ; <<>> DiG 9.3.2-P2 <<>> ns egysol.com @a.gtld-servers.net
> ; (2 servers found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7774
> ;; flags: qr rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2
>
> ;; QUESTION SECTION:
> ;egysol.com. IN NS
>
> ;; ANSWER SECTION:
> egysol.com. 172800 IN NS ns1.egysol.net.
> egysol.com. 172800 IN NS ns2.egysol.net.
>
> ;; ADDITIONAL SECTION:
> ns1.egysol.net. 172800 IN A 216.246.41.231
> ns2.egysol.net. 172800 IN A 216.246.41.232
>
> ;; Query time: 461 msec
> ;; SERVER: 2001:503:a83e::2:30#53(2001:503:a83e::2:30)
> ;; WHEN: Wed Jan 31 00:29:39 2007
> ;; MSG SIZE rcvd: 106
>
> %
>
> % dig ns1.egysol.com @216.246.41.231
>
> ; <<>> DiG 9.3.2-P2 <<>> ns1.egysol.com @216.246.41.231
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 65104
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;ns1.egysol.com. IN A
>
> ;; AUTHORITY SECTION:
> egysol.com. 86400 IN SOA ns1.egysol.net.
> root.server.egysol.net. 2006082801 86400 7200 3600000 86400
>
> ;; Query time: 229 msec
> ;; SERVER: 216.246.41.231#53(216.246.41.231)
> ;; WHEN: Wed Jan 31 00:32:52 2007
> ;; MSG SIZE rcvd: 94
>
> % dig ns1.egysol.com @216.246.41.232
>
> ; <<>> DiG 9.3.2-P2 <<>> ns1.egysol.com @216.246.41.232
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 601
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;ns1.egysol.com. IN A
>
> ;; AUTHORITY SECTION:
> egysol.com. 86400 IN SOA ns1.egysol.net.
> root.server.egysol.net. 2006082801 86400 7200 3600000 86400
>
> ;; Query time: 216 msec
> ;; SERVER: 216.246.41.232#53(216.246.41.232)
> ;; WHEN: Wed Jan 31 00:33:02 2007
> ;; MSG SIZE rcvd: 94
>
> % dig ns2.egysol.com @216.246.41.232
>
> ; <<>> DiG 9.3.2-P2 <<>> ns2.egysol.com @216.246.41.232
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 65101
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;ns2.egysol.com. IN A
>
> ;; AUTHORITY SECTION:
> egysol.com. 86400 IN SOA ns1.egysol.net.
> root.server.egysol.net. 2006082801 86400 7200 3600000 86400
>
> ;; Query time: 220 msec
> ;; SERVER: 216.246.41.232#53(216.246.41.232)
> ;; WHEN: Wed Jan 31 00:33:47 2007
> ;; MSG SIZE rcvd: 94
>
> % dig ns2.egysol.com @216.246.41.231
>
> ; <<>> DiG 9.3.2-P2 <<>> ns2.egysol.com @216.246.41.231
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 10420
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;ns2.egysol.com. IN A
>
> ;; AUTHORITY SECTION:
> egysol.com. 86400 IN SOA ns1.egysol.net.
> root.server.egysol.net. 2006082801 86400 7200 3600000 86400
>
> ;; Query time: 222 msec
> ;; SERVER: 216.246.41.231#53(216.246.41.231)
> ;; WHEN: Wed Jan 31 00:33:52 2007
> ;; MSG SIZE rcvd: 94
>
> %
>
> % dig +norec ns1.egysol.com @a.gtld-servers.net
>
> ; <<>> DiG 9.3.2-P2 <<>> +norec ns1.egysol.com @a.gtld-servers.net
> ; (2 servers found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35065
> ;; flags: qr; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
>
> ;; QUESTION SECTION:
> ;ns1.egysol.com. IN A
>
> ;; ANSWER SECTION:
> ns1.egysol.com. 172800 IN A 207.106.22.124
>
> ;; AUTHORITY SECTION:
> egysol.com. 172800 IN NS ns1.egysol.net.
> egysol.com. 172800 IN NS ns2.egysol.net.
>
> ;; ADDITIONAL SECTION:
> ns1.egysol.net. 172800 IN A 216.246.41.231
> ns2.egysol.net. 172800 IN A 216.246.41.232
>
> ;; Query time: 468 msec
> ;; SERVER: 2001:503:a83e::2:30#53(2001:503:a83e::2:30)
> ;; WHEN: Wed Jan 31 00:37:21 2007
> ;; MSG SIZE rcvd: 126
>
> %
>
> % dig bluepages.com.sa mx @207.106.22.124
>
> ; <<>> DiG 9.3.2-P2 <<>> bluepages.com.sa mx @207.106.22.124
> ; (1 server found)
> ;; global options: printcmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45813
> ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3
>
> ;; QUESTION SECTION:
> ;bluepages.com.sa. IN MX
>
> ;; ANSWER SECTION:
> bluepages.com.sa. 86400 IN MX 10 mail.bluepages.com.sa.
>
> ;; AUTHORITY SECTION:
> bluepages.com.sa. 86400 IN NS ns1.rapidns.com.
> bluepages.com.sa. 86400 IN NS ns2.rapidns.com.
>
> ;; ADDITIONAL SECTION:
> mail.bluepages.com.sa. 86400 IN A 207.106.22.33
> ns1.rapidns.com. 86400 IN A 207.106.22.124
> ns2.rapidns.com. 86400 IN A 66.7.149.52
>
> ;; Query time: 245 msec
> ;; SERVER: 207.106.22.124#53(207.106.22.124)
> ;; WHEN: Wed Jan 31 00:45:05 2007
> ;; MSG SIZE rcvd: 150
>
> %
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews at isc.org
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