asked on

Dns not working

Am a newbie and am trying to configure a machine as a primary dns for the domain mail.articulateonline.com

i think the config is correct and i still dont know what is wrong. please help.

follows are the configuration files.

named.conf
-----------
options {
      directory "/var/named";
};
zone "." {
      type hint;
      file "named.ca";
};
zone "0.0.127.in-addr.arpa"{
      type master;
      file "named.local";
};

zone "articulateonline.com" {
      type master;
      file "/var/named/articulateonline.com.hosts";
      also-notify {
            202.187.120.252;
            };
      notify yes;
      };

zone "120.187.202.in-addr.arpa" {
      type master;
      file "/var/named/202.187.120.rev";
      also-notify {
            202.187.120.252;
            };
      notify yes;
      };

articulateonline.com.hosts
--------------------------
articulateonline.com.      IN      SOA      mail. root.articulateonline.com. (
                  945759165
                  10800
                  3600
                  432000
                  38400 )
articulateonline.com.      IN      NS      mail.
articulateonline.com.      IN      MX      10 articulateonline.com.
mail.articulateonline.com.      IN      CNAME      articulateonline.com.
articulateonline.com.      IN      A      202.187.120.249

202.187.120.rev
---------------
120.187.202.in-addr.arpa.      IN      SOA      mail.articulateonline.com root.articulateonline.com. (
                  945759189 ; Serial
                  10800 ; Refresh
                  1800 ; Retry
                  432000 ; Expire
                  21600 ) ; Minimum

       IN      NS      mail.articulateonline.com.
IN NS dns2.articulateonline.com.

@        IN PTR      mail.articulateonline.com.
248        IN PTR      hostname.ibidlive.com.
252 IN PTR      hostname.pos-premium.com.

resolv.conf
-----------
nameserver 202.187.120.249
nameserver 202.187.120.252

thanks in advance.

ASKER CERTIFIED SOLUTION

Timmermann

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noree97

ASKER

I tried to do an nslookup and the results are as follows. And am only able to do a successful nslookup on that domain with the server as localhost.

> server 202.187.120.249
Default Server: [202.187.120.249]
Address: 202.187.120.249

> mail.articulateonline.com
Server: [202.187.120.249]
Address: 202.187.120.249

*** [202.187.120.249] can't find mail.articulateonline.com: No response from ser
ver
>

noree97

ASKER

Am sorry....
that error was with the default resov.conf

nameserver 202.187.120.2
nameserver 202.185.200.2
nameserver 202.185.199.250

but if it is

nameserver 202.187.120.249
nameserver 202.187.120.252

I get the error message that there is no response from both of the server.

Timmermann

sorry, no idea...

can you take a log in
/var/log/messages for hints?

Can you enable a debugging on nslookup?

Is the TCP/IP Port to the Name-Server
ready for questions?

HTH anyhow...

Timmermann

noree97

ASKER

Adjusted points to 160

noree97

ASKER

how can i enable debugging on nslookup?

and how can i check if the TCP/IP Port to the Name-Server
ready for questions?

i restart the ndc service and this is what i got from /var/log/messages

Feb 25 14:52:58 articulateonline named[30862]: starting. named 8.2.1 Fri Sep 24 14:52:24 EDT 1999 ^Iroot@porky.devel.redhat.com:/
usr/src/bs/BUILD/bind-8.2.1/src/bin/named
Feb 25 14:52:58 articulateonline named[30862]: hint zone "" (IN) loaded (serial 0)
Feb 25 14:52:58 articulateonline named[30862]: Zone "0.0.127.in-addr.arpa" (file named.local): No default TTL set using SOA minimu
m instead
Feb 25 14:52:58 articulateonline named[30862]: master zone "0.0.127.in-addr.arpa" (IN) loaded (serial 1997022700)
Feb 25 14:52:58 articulateonline named[30862]: Zone "articulateonline.com" (file /var/named/articulateonline.com.hosts): No defaul
t TTL set using SOA minimum instead
Feb 25 14:52:58 articulateonline named[30862]: /var/named/articulateonline.com.hosts: WARNING SOA expire value is less than 7 days
(432000)
Feb 25 14:52:58 articulateonline named[30862]: /var/named/articulateonline.com.hosts:13: IP Address error (202.187.120.xx)
Feb 25 14:52:58 articulateonline named[30862]: master zone "articulateonline.com" (IN) rejected due to errors (serial 945759165)
Feb 25 14:52:58 articulateonline named[30862]: Zone "120.187.202.in-addr.arpa" (file /var/named/202.187.120.rev): No default TTL s
et using SOA minimum instead
Feb 25 14:52:58 articulateonline named[30862]: /var/named/202.187.120.rev: WARNING SOA expire value is less than 7 days (432000)
Feb 25 14:52:58 articulateonline named[30862]: master zone "120.187.202.in-addr.arpa" (IN) loaded (serial 945759189)
Feb 25 14:52:58 articulateonline named[30862]: Zone "ibidlive.com" (file /var/named/ibidlive.com.hosts): No default TTL set using
SOA minimum instead
Feb 25 14:52:58 articulateonline named[30862]: /var/named/ibidlive.com.hosts: WARNING SOA expire value is less than 7 days (432000
)
Feb 25 14:52:58 articulateonline named[30862]: master zone "ibidlive.com" (IN) loaded (serial 945760195)
Feb 25 14:52:58 articulateonline named[30862]: Zone "pos-premium.com" (file /var/named/pos-premium.com.hosts): No default TTL set
using SOA minimum instead
Feb 25 14:52:58 articulateonline named[30862]: /var/named/pos-premium.com.hosts: WARNING SOA expire value is less than 7 days (432
000)
Feb 25 14:52:58 articulateonline named[30862]: master zone "pos-premium.com" (IN) loaded (serial 946544118)
Feb 25 14:52:58 articulateonline named[30862]: Zone "limborock.com" (file /var/named/limborock.com.hosts): No default TTL set usin
g SOA minimum instead
Feb 25 14:52:58 articulateonline named[30862]: /var/named/limborock.com.hosts: WARNING SOA expire value is less than 7 days (43200
0)
Feb 25 14:52:58 articulateonline named[30862]: master zone "limborock.com" (IN) loaded (serial 946546955)
Feb 25 14:52:58 articulateonline named[30862]: listening on [127.0.0.1].53 (lo)
Feb 25 14:52:58 articulateonline named[30862]: listening on [10.200.200.2].53 (eth0)
Feb 25 14:52:58 articulateonline named[30862]: Forwarding source address is [0.0.0.0].3511
Feb 25 14:52:58 articulateonline named[30863]: Ready to answer queries.
Feb 25 14:53:07 articulateonline named[30863]: sysquery: findns error (SERVFAIL) on dns2.articulateonline.com?
Feb 25 14:53:07 articulateonline named[30863]: Sent NOTIFY for "120.187.202.in-addr.arpa IN SOA" (120.187.202.in-addr.arpa); 2 NS,
2 A
Feb 25 14:53:08 articulateonline named[30863]: Sent NOTIFY for "ibidlive.com IN SOA" (ibidlive.com); 1 NS, 1 A
Feb 25 14:53:08 articulateonline named[30863]: Response from unexpected source ([10.200.200.4].53)
Feb 25 14:53:24 articulateonline named[30863]: Sent NOTIFY for "pos-premium.com IN SOA" (pos-premium.com); 1 NS, 1 A
Feb 25 14:53:25 articulateonline named[30863]: Sent NOTIFY for "limborock.com IN SOA" (limborock.com); 1 NS, 1 A

Timmermann

Debugging Nslookup..

look in manpage of nslookup:
----------
SEE ALSO
nstest(1M), resolver(3N), resolv.conf(4)

RFC 882, RFC 883
---------
so nstest may help and the RFCs

port open for nameserver? Test it
with a look in /etc/services ...

at 42 it schould be active

a portscan on your own machine might
help too.

-----

Lookout for Errors here:

Feb 25 14:52:58 articulateonline named[30862]: starting. named 8.2.1 Fri Sep 24 14:52:24 EDT 1999 ^Iroot@porky.devel.redhat.com:/
usr/src/bs/BUILD/bind-8.2.1/src/bin/named

anyhow.. better take the newest bind
for security reasons... esp. if you
set up primary DNS

Feb 25 14:52:58 articulateonline named[30862]: Zone "0.0.127.in-addr.arpa" (file named.local): No default TTL set using SOA minimum instead

UPS!

TTL is danger! Look in o reilys book
on BIND!

If you configure a high TTL and another
DNS recognize this, it wont be possible
to tell changes to the internet...

until TTL is elapsed! Danger!

/var/named/articulateonline.com.hosts:13: IP Address error (202.187.120.xx)
Feb 25 14:52:58 articulateonline named[30862]: master zone "articulateonline.com" (IN) rejected due to errors (serial 945759165)

Look! Rejected! so no answer!
look in manpage of named too!

Feb 25 14:52:58 articulateonline named[30862]: master zone "limborock.com" (IN) loaded (serial 946546955)

hoho!

Feb 25 14:52:58 articulateonline named[30862]: listening on [127.0.0.1].53 (lo)

on lo = local limborock should work

Feb 25 14:52:58 articulateonline named[30862]: listening on [10.200.200.2].53 (eth0)

on ethernet-card (ifconfig!)

Feb 25 14:52:58 articulateonline named[30863]: Ready to answer queries.

Feb 25 14:53:07 articulateonline named[30863]: sysquery: findns error (SERVFAIL) on dns2.articulateonline.com?

OHOH! where is dns2?

Feb 25 14:53:07 articulateonline named[30863]: Sent NOTIFY for "120.187.202.in-addr.arpa IN SOA" (120.187.202.in-addr.arpa); 2 NS,
2 A
Feb 25 14:53:08 articulateonline named[30863]: Sent NOTIFY for "ibidlive.com IN SOA" (ibidlive.com); 1 NS, 1 A
Feb 25 14:53:08 articulateonline named[30863]: Response from unexpected source ([10.200.200.4].53)

ups!

Feb 25 14:53:24 articulateonline named[30863]: Sent NOTIFY for "pos-premium.com IN SOA" (pos-premium.com); 1 NS, 1 A
Feb 25 14:53:25 articulateonline named[30863]: Sent NOTIFY for "limborock.com IN SOA" (limborock.com); 1 NS, 1 A

here the nameserver tries first publishing of his configuration to the
internet...

Hope it helps...

I advise the oReily book on dns + Bind