[gentoo-user] Bind Questions

[gentoo-user] Bind Questions

[Hiren Dave]

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 Hi,

I am learning Linux DNS server (named) and I found that the "host
<hostname>" command works
only if there is an entry in the corresponding domain zone file(i.e.
localhost.zone) and the "dig -x <ip>" command
works only if there is an entry in the corresponding reverse domain zone
file(i.e. 0.0.127.in-addr.arpa.zone). And it
is not necessary to enter hostname in hosts file. Also in the same network
there are many linux and windows
clients but the Linuz DNS server (named) is not giving any response to the
host or dig command by its own. Can any one tell me
how the Named/DNS server works? How it discovers neighboorhood(local LAN)
hosts? Also can we check/list all the hosts/ip addresses that are cached by
dns server? If yes, then HOW?

Any answers/suggestions will be appreciated. Hiren Dave

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Re: [gentoo-user] Bind Questions

[Alexander Kirillov]

> Also in the same 
> network there are many linux and windows
> clients but the Linuz DNS server (named) is not giving any response to 
> the host or dig command by its own. Can any one tell me
> how the Named/DNS server works? How it discovers neighboorhood(local 
> LAN) hosts?

I don't think it does. But you may get something similar
with dhcp and dynamic dns updates.

 > Also can we check/list all the hosts/ip addresses that are
> cached by dns server? If yes, then HOW?

# rndc dumpdb -cache

HTH

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gentoo-user@gentoo.org mailing list

Re: [gentoo-user] Bind Questions

[Hiren Dave]

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On 3/12/06, Alexander Kirillov <nevis2us@infoline.su> wrote:
>
> > Also in the same
> > network there are many linux and windows
> > clients but the Linuz DNS server (named) is not giving any response to
> > the host or dig command by its own. Can any one tell me
> > how the Named/DNS server works? How it discovers neighboorhood(local
> > LAN) hosts?
>
> I don't think it does. But you may get something similar
> with dhcp and dynamic dns updates.
>
> > Also can we check/list all the hosts/ip addresses that are
> > cached by dns server? If yes, then HOW?
>
> # rndc dumpdb -cache
>
> HTH
>
> --
> gentoo-user@gentoo.org mailing list
>
>
Hi,
Thanks for reply. Can you brief your answer about dhcp and dynamic dns
updates pls? Also after using the given command for dumpdb, how to check
this db file? Can we check it by simple cat command?

Hiren Dave

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[gentoo-user] Bind Questions...

[Hiren Dave]

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Hi All,

I am facing one problem. Here is a message log from server1(Master DNS) and
server2(Slave DNS) on domain guru.com

=================SERVER1.GURU.COM===============================

Mar 12 15:40:57 server1 kernel: Disabled Privacy Extensions on device
c0366c20(lo)

Mar 12 15:40:57 server1 network: Bringing up loopback interface: succeeded

Mar 12 15:40:57 server1 kernel: ip_tables: (C) 2000-2002 Netfilter core team

Mar 12 15:41:00 server1 network: Bringing up interface eth0: succeeded

Mar 12 15:41:57 server1 named[2760]: shutting down: flushing changes

Mar 12 15:41:57 server1 named[2760]: stopping command channel on
127.0.0.1#953

Mar 12 15:41:57 server1 named[2760]: no longer listening on 127.0.0.1#53

Mar 12 15:41:57 server1 named[2760]: no longer listening on 192.168.0.2#53

Mar 12 15:41:57 server1 named[2760]: exiting

Mar 12 15:41:57 server1 named: succeeded

Mar 12 15:41:59 server1 named[3042]: starting BIND 9.2.4 -u named -t
/var/named/chroot

Mar 12 15:41:59 server1 named[3042]: using 1 CPU

Mar 12 15:41:59 server1 named: named startup succeeded

Mar 12 15:41:59 server1 named[3042]: loading configuration from
'/etc/named.conf'

Mar 12 15:41:59 server1 named[3042]: listening on IPv4 interface lo,
127.0.0.1#53

Mar 12 15:41:59 server1 named[3042]: listening on IPv4 interface eth0,
192.168.0.2#53

Mar 12 15:41:59 server1 named[3042]: command channel listening on
127.0.0.1#953

Mar 12 15:41:59 server1 named[3042]: zone 0.0.127.in-addr.arpa/IN: loaded
serial 0

Mar 12 15:41:59 server1 named[3042]: zone 0.168.192.in-addr.arpa/IN: loaded
serial 0

Mar 12 15:41:59 server1 named[3042]: zone guru.com/IN: loaded serial 0

Mar 12 15:41:59 server1 named[3042]: zone localhost/IN: loaded serial 0

Mar 12 15:41:59 server1 named[3042]: running

Mar 12 15:47:08 server1 named[3042]: client 192.168.0.3#1027: transfer of '
0.168.192.in-addr.arpa/IN': AXFR started

Mar 12 15:47:09 server1 named[3042]: client 192.168.0.3#1028: transfer of '
guru.com/IN': AXFR started

Mar 12 15:47:56 server1 named[3042]: client 192.168.0.3#1029: transfer of '
0.168.192.in-addr.arpa/IN': AXFR started

Mar 12 15:48:08 server1 named[3042]: client 192.168.0.3#1030: transfer of '
guru.com/IN': AXFR started

Mar 12 15:49:53 server1 named[3042]: client 192.168.0.3#1031: transfer of '
guru.com/IN': AXFR started

Mar 12 15:49:55 server1 named[3042]: client 192.168.0.3#1032: transfer of '
0.168.192.in-addr.arpa/IN': AXFR started

Mar 12 15:53:00 server1 named[3042]: client 192.168.0.3#1033: transfer of '
guru.com/IN': AXFR started

Mar 12 15:53:46 server1 named[3042]: client 192.168.0.3#1034: transfer of '
0.168.192.in-addr.arpa/IN': AXFR started
=========================END====================================

 =================SERVER2.GURU.COM===============================

Mar 12 15:38:06 server2 named[2881]: transfer of '0.168.192.in-addr.arpa/IN'
from 192.168.0.2#53: failed while receiving responses: permission denied

Mar 12 15:38:06 server2 named[2881]: transfer of '0.168.192.in-addr.arpa/IN'
from 192.168.0.2#53: end of transfer

Mar 12 15:38:07 server2 named[2881]: dumping master file: tmp-XXXX8In1Va:
open: permission denied

Mar 12 15:38:07 server2 named[2881]: transfer of 'guru.com/IN' from
192.168.0.2#53: failed while receiving responses: permission denied

Mar 12 15:38:07 server2 named[2881]: transfer of 'guru.com/IN' from
192.168.0.2#53: end of transfer

Mar 12 15:38:07 server2 kernel: audit(1142158087.021:0): avc: denied { write
} for pid=2882 exe=/usr/sbin/named name=named dev=dm-0 ino=622131
scontext=root:system_r:named_t tcontext=system_u:object_r:named_zone_t
tclass=dir

Mar 12 15:38:53 server2 named[2881]: dumping master file: tmp-XXXXU7SDSa:
open: permission denied

Mar 12 15:38:53 server2 named[2881]: transfer of '0.168.192.in-addr.arpa/IN'
from 192.168.0.2#53: failed while receiving responses: permission denied

Mar 12 15:38:53 server2 named[2881]: transfer of '0.168.192.in-addr.arpa/IN'
from 192.168.0.2#53: end of transfer

Mar 12 15:38:53 server2 kernel: audit(1142158133.521:0): avc: denied { write
} for pid=2882 exe=/usr/sbin/named name=named dev=dm-0 ino=622131
scontext=root:system_r:named_t tcontext=system_u:object_r:named_zone_t
tclass=dir

Mar 12 15:39:05 server2 named[2881]: dumping master file: tmp-XXXXHYCIDL:
open: permission denied

Mar 12 15:39:05 server2 named[2881]: transfer of 'guru.com/IN' from
192.168.0.2#53: failed while receiving responses: permission denied

Mar 12 15:39:05 server2 named[2881]: transfer of 'guru.com/IN' from
192.168.0.2#53: end of transfer

Mar 12 15:39:05 server2 kernel: audit(1142158145.520:0): avc: denied { write
} for pid=2882 exe=/usr/sbin/named name=named dev=dm-0 ino=622131
scontext=root:system_r:named_t tcontext=system_u:object_r:named_zone_t
tclass=dir

Mar 12 15:40:51 server2 named[2881]: dumping master file: tmp-XXXXYRYrFA:
open: permission denied

Mar 12 15:40:51 server2 named[2881]: transfer of 'guru.com/IN' from
192.168.0.2#53: failed while receiving responses: permission denied

Mar 12 15:40:51 server2 named[2881]: transfer of 'guru.com/IN' from
192.168.0.2#53: end of transfer

Mar 12 15:40:51 server2 kernel: audit(1142158251.528:0): avc: denied { write
} for pid=2882 exe=/usr/sbin/named name=named dev=dm-0 ino=622131
scontext=root:system_r:named_t tcontext=system_u:object_r:named_zone_t
tclass=dir

Mar 12 15:40:53 server2 named[2881]: dumping master file: tmp-XXXXjkjuJv:
open: permission denied

Mar 12 15:40:53 server2 named[2881]: transfer of '0.168.192.in-addr.arpa/IN'
from 192.168.0.2#53: failed while receiving responses: permission denied

Mar 12 15:40:53 server2 named[2881]: transfer of '0.168.192.in-addr.arpa/IN'
from 192.168.0.2#53: end of transfer

Mar 12 15:40:53 server2 kernel: audit(1142158253.519:0): avc: denied { write
} for pid=2882 exe=/usr/sbin/named name=named dev=dm-0 ino=622131
scontext=root:system_r:named_t tcontext=system_u:object_r:named_zone_t
tclass=dir

Mar 12 15:43:58 server2 named[2881]: dumping master file: tmp-XXXXilsgjw:
open: permission denied

Mar 12 15:43:58 server2 named[2881]: transfer of 'guru.com/IN' from
192.168.0.2#53: failed while receiving responses: permission denied

Mar 12 15:43:58 server2 named[2881]: transfer of 'guru.com/IN' from
192.168.0.2#53: end of transfer

Mar 12 15:43:58 server2 kernel: audit(1142158438.527:0): avc: denied { write
} for pid=2882 exe=/usr/sbin/named name=named dev=dm-0 ino=622131
scontext=root:system_r:named_t tcontext=system_u:object_r:named_zone_t
tclass=dir

Mar 12 15:44:44 server2 named[2881]: dumping master file: tmp-XXXXBCugxM:
open: permission denied

Mar 12 15:44:44 server2 named[2881]: transfer of '0.168.192.in-addr.arpa/IN'
from 192.168.0.2#53: failed while receiving responses: permission denied

Mar 12 15:44:44 server2 named[2881]: transfer of '0.168.192.in-addr.arpa/IN'
from 192.168.0.2#53: end of transfer

Mar 12 15:44:44 server2 kernel: audit(1142158484.528:0): avc: denied { write
} for pid=2882 exe=/usr/sbin/named name=named dev=dm-0 ino=622131
scontext=root:system_r:named_t tcontext=system_u:object_r:named_zone_t
tclass=dir
 =========================END====================================

Any help/suggestions will be appreciated
Hiren Dave

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