Cache problem
Mark Andrews
Mark_Andrews at isc.org
Tue Jan 30 13:52:55 UTC 2007
> Dear List,
>
> I have a problem with my DNS cache which I cant 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 didnt 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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