RE: how to modify the cache

2014-02-19 Thread houguanghua
Steven,
 
Your solution is very good. It can forward the queries to the specified name 
servers first.
 
But if the specified name server is enabled only when normal dns query process 
is down. How to configure the local DNS server?  The detailed scenario is 
descibed in below figure:
 

--
   |Root |  

   | nameServer |
 /  -
 ②/   
   /
 --      
-
| Client | __①\ |   Local | ___③_\ |  Authority|
  
| Resolver | / | DNS Server |   X   / | DNS Server  |
 --   
-
   \ 
\④
 \
  \  
|  Hidden  |
| DNS Server |
 
Normally,
  1) A internet user wants to access www.abc.com, a DNS request is sent to 
local DNS server
  2) Local DNS server queries the root name server, the .com name server to get 
the Authority Name Server of abc.com  
 3) local DNS server queries the Authority name server, and gets the IP
 
But when the Authority name server is down, the internet user won't get  the IP 
address.  My solution is as follows:
 a) A hidden name server with low performance is deployed. When authority 
name server can't be accessed, local dns server will access the hidden server.
 b)The hidden server is never used in normal situation. It act as a cold 
backup for authority name server.
 c) The zone file in the hidden server is the same as that configuration in 
the authority name server 
 d) The hidden name server doesn't appear in the NS records of  authority 
name server 
 
Btw, all above doesn't consider the cache in the local dns server.
 
 
 Best Regards,
Guanghua

 
 Date: Mon, 17 Feb 2014 09:09:13 +
 Subject: Re: how to modify the cache
 From: sjc...@gmail.com
 To: houguang...@hotmail.com
 CC: bind-users@lists.isc.org
 
 On 17 February 2014 01:17, houguanghua houguang...@hotmail.com wrote:
  I want to override the IP address of NS, for I want to use other authority
  DNS which isn't registered.
 
 For that you use forwarding. Create a zone statement for the zone in
 question and forward the queries to a different name server. You don't
 need to mess with the cache.
 
 https://mknowles.com.au/wordpress/2009/07/20/bind-forwarding-zone/
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Bind/PowerDNS interoperatiblity issue

2014-02-19 Thread Aki Tuomi
Hi!

We are investigating an interoperatibility issue with bind and powerdns. 

Scenario:

We have DNSSEC secured domain using NSEC, pasilehto.fi. 

This domain has two insecure delegations
 0.0.0.0.pasilehto.fi
and
 1.0.0.0.pasilehto.fi

We have A records
 5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi
and
 5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.0.0.0.0.pasilehto.fi


Now. If I ask DNSSEC validating BIND version 9.9.3-P2 or 9.9.4-P2 to 
resolve either of those A records, I get errors, while While google's 
8.8.8.8 and unbound accept these as valid. 

You can go ahead and test this live, these domains are publicly available for
now. 

There is also open issue in github for PowerDNS.

https://github.com/PowerDNS/pdns/issues/1289

The errors are here:

Feb 19 10:45:52 cmouse-virtual-machine named[15177]: client 80.64.8.203#57968 
(5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi): query: 
5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi IN A +E 
(80.64.8.203)
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: error (no valid RRSIG) 
resolving '0.pasilehto.fi/DS/IN': 194.100.90.53#53
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: error (no valid RRSIG) 
resolving '0.pasilehto.fi/DS/IN': 80.64.12.65#53
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: error (no valid RRSIG) 
resolving '0.pasilehto.fi/DS/IN': 2001:6e8:0:1::4:2#53
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: error (no valid RRSIG) 
resolving '0.pasilehto.fi/DS/IN': 2001:6e8:0:1::3:2#53
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: error (no valid RRSIG) 
resolving '0.pasilehto.fi/DS/IN': 2001:6e8:0:1::5:2#53
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: error (no valid RRSIG) 
resolving '0.pasilehto.fi/DS/IN': 62.236.49.41#53
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: error (no valid DS) 
resolving '5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi/A/IN': 
62.236.49.41#53
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: validating 
@0x7fa3406146e0: 5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi 
A: bad cache hit (0.pasilehto.fi/DS)
Feb 19 10:45:53 cmouse-virtual-machine named[15177]: error (broken trust chain) 
resolving '5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi/A/IN': 
194.100.90.53#53

Kind regards,
Aki Tuomi


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Re: intermittent resolving problem for some domains

2014-02-19 Thread Niall O'Reilly
At Wed, 19 Feb 2014 00:33:11 +0200,
Daniel Dawalibi wrote:
 
 Kindly note that the number of recursive clients is increasing during
 the problem : recursive clients: 3700/14900/15000

  I think it's likely that you have a connectivity problem.

  I'ld suggest checking whether your server which is giving these
  messages can reach any of the root servers or even any of the
  external Internet.

  Best regards,
  Niall O'Reilly
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Re: Bind/PowerDNS interoperatiblity issue

2014-02-19 Thread Tony Finch
Aki Tuomi cmo...@cmouse.fi wrote:

 We have A records
  5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi
 and
  5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.0.0.0.0.pasilehto.fi

 Now. If I ask DNSSEC validating BIND version 9.9.3-P2 or 9.9.4-P2 to
 resolve either of those A records, I get errors, while While google's
 8.8.8.8 and unbound accept these as valid.

I have tried this with BIND 9.9.5 and 9.10.0a2 and both resolve and
validate these domains successvully.

Tony.
-- 
f.anthony.n.finch  d...@dotat.at  http://dotat.at/
German Bight, Humber, Thames, Dover, Wight, Portland: West backing south, 4 or
5 increasing 6 or 7 later. Moderate. Rain at times. Moderate or good,
occasionally poor.
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Re: Bind/PowerDNS interoperatiblity issue

2014-02-19 Thread Aki Tuomi
On Wed, Feb 19, 2014 at 12:16:19PM +0200, Aki Tuomi wrote:
 Hi!
 
 We are investigating an interoperatibility issue with bind and powerdns. 

It would appear that PowerDNS is not adding non-terminals with NSEC zones.
This causes that 0.pasilehto.fi returns NXDOMAIN instead of NOERROR, 
causing this issue. 

When added non-terminals by hand, bind accepted the zone. Sorry for
the noise.

Aki Tuomi


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Re: how to modify the cache

2014-02-19 Thread Steven Carr
On 19 February 2014 09:51, houguanghua houguang...@hotmail.com wrote:
 But if the specified name server is enabled only when normal dns query
 process is down. How to configure the local DNS server?  The detailed
 scenario is descibed in below figure:

I'm not sure if that is possible, you either forward or you allow
normal resolution to take place. You may be able to use static-stub
in this instance but that's not something I've ever used before,
someone else might be able to shed some light...

Steve
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Re: Bind/PowerDNS interoperatiblity issue

2014-02-19 Thread Aki Tuomi
On Wed, Feb 19, 2014 at 11:50:24AM +, Tony Finch wrote:
 Aki Tuomi cmo...@cmouse.fi wrote:
 
  We have A records
   5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi
  and
   5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.0.0.0.0.pasilehto.fi
 
  Now. If I ask DNSSEC validating BIND version 9.9.3-P2 or 9.9.4-P2 to
  resolve either of those A records, I get errors, while While google's
  8.8.8.8 and unbound accept these as valid.
 
 I have tried this with BIND 9.9.5 and 9.10.0a2 and both resolve and
 validate these domains successvully.
 

Hi, can you try again? Just to be sure. 

 Tony.
 -- 
 f.anthony.n.finch  d...@dotat.at  http://dotat.at/
 German Bight, Humber, Thames, Dover, Wight, Portland: West backing south, 4 or
 5 increasing 6 or 7 later. Moderate. Rain at times. Moderate or good,
 occasionally poor.


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Re: Bind/PowerDNS interoperatiblity issue

2014-02-19 Thread Tony Finch
Aki Tuomi cmo...@cmouse.fi wrote:

 Hi, can you try again? Just to be sure.

This time it failed in the way you described earlier:

19-Feb-2014 12:23:27.043 queries: info: client ::1#32049 
(5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi): view rec: 
query: 5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi IN A +E 
(::1)
19-Feb-2014 12:23:27.162 lame-servers: info: error (no valid RRSIG) resolving 
'0.pasilehto.fi/DS/IN': 2001:6e8:0:1::3:2#53
19-Feb-2014 12:23:27.212 lame-servers: info: error (no valid RRSIG) resolving 
'0.pasilehto.fi/DS/IN': 80.64.12.65#53
19-Feb-2014 12:23:27.221 queries: info: client ::1#32777 (api.twitter.com): 
view rec: query: api.twitter.com IN A +E (::1)
19-Feb-2014 12:23:27.221 queries: info: client ::1#47673 (api.twitter.com): 
view rec: query: api.twitter.com IN  +E (::1)
19-Feb-2014 12:23:27.258 lame-servers: info: error (no valid RRSIG) resolving 
'0.pasilehto.fi/DS/IN': 62.236.49.41#53
19-Feb-2014 12:23:27.301 lame-servers: info: error (no valid RRSIG) resolving 
'0.pasilehto.fi/DS/IN': 194.100.90.53#53
19-Feb-2014 12:23:27.344 lame-servers: info: error (no valid RRSIG) resolving 
'0.pasilehto.fi/DS/IN': 2001:6e8:0:1::5:2#53
19-Feb-2014 12:23:27.384 lame-servers: info: error (no valid RRSIG) resolving 
'0.pasilehto.fi/DS/IN': 2001:6e8:0:1::4:2#53
19-Feb-2014 12:23:27.384 lame-servers: info: error (no valid DS) resolving 
'5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi/A/IN': 
194.100.90.53#53
19-Feb-2014 12:23:27.449 dnssec: info: validating @0x806dca500: 
5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi A: bad cache hit 
(0.pasilehto.fi/DS)
19-Feb-2014 12:23:27.449 lame-servers: info: error (broken trust chain) 
resolving '5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi/A/IN': 
80.64.12.65#53
19-Feb-2014 12:23:27.449 query-errors: info: client ::1#32049 
(5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi): view rec: query 
failed (SERVFAIL) for 
5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi/IN/A at 
query.c:7519

Tony.
-- 
f.anthony.n.finch  d...@dotat.at  http://dotat.at/
Malin, Hebrides: Southeast 5 to 7, occasionally gale 8, veering west or
southwest 5 or 6 later. Moderate or rough, becoming rough or very rough.
Showers then rain. Good, becoming moderate or poor.
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Re: Bind/PowerDNS interoperatiblity issue

2014-02-19 Thread Aki Tuomi
On Wed, Feb 19, 2014 at 12:27:05PM +, Tony Finch wrote:
 Aki Tuomi cmo...@cmouse.fi wrote:
 
  Hi, can you try again? Just to be sure.
 
 This time it failed in the way you described earlier:
 
 19-Feb-2014 12:23:27.043 queries: info: client ::1#32049 
 (5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi): view rec: 
 query: 5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi IN A +E 
 (::1)
 19-Feb-2014 12:23:27.162 lame-servers: info: error (no valid RRSIG) resolving 
 '0.pasilehto.fi/DS/IN': 2001:6e8:0:1::3:2#53
 19-Feb-2014 12:23:27.212 lame-servers: info: error (no valid RRSIG) resolving 
 '0.pasilehto.fi/DS/IN': 80.64.12.65#53
 19-Feb-2014 12:23:27.221 queries: info: client ::1#32777 (api.twitter.com): 
 view rec: query: api.twitter.com IN A +E (::1)
 19-Feb-2014 12:23:27.221 queries: info: client ::1#47673 (api.twitter.com): 
 view rec: query: api.twitter.com IN  +E (::1)
 19-Feb-2014 12:23:27.258 lame-servers: info: error (no valid RRSIG) resolving 
 '0.pasilehto.fi/DS/IN': 62.236.49.41#53
 19-Feb-2014 12:23:27.301 lame-servers: info: error (no valid RRSIG) resolving 
 '0.pasilehto.fi/DS/IN': 194.100.90.53#53
 19-Feb-2014 12:23:27.344 lame-servers: info: error (no valid RRSIG) resolving 
 '0.pasilehto.fi/DS/IN': 2001:6e8:0:1::5:2#53
 19-Feb-2014 12:23:27.384 lame-servers: info: error (no valid RRSIG) resolving 
 '0.pasilehto.fi/DS/IN': 2001:6e8:0:1::4:2#53
 19-Feb-2014 12:23:27.384 lame-servers: info: error (no valid DS) resolving 
 '5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi/A/IN': 
 194.100.90.53#53
 19-Feb-2014 12:23:27.449 dnssec: info: validating @0x806dca500: 
 5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi A: bad cache hit 
 (0.pasilehto.fi/DS)
 19-Feb-2014 12:23:27.449 lame-servers: info: error (broken trust chain) 
 resolving 
 '5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi/A/IN': 
 80.64.12.65#53
 19-Feb-2014 12:23:27.449 query-errors: info: client ::1#32049 
 (5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi): view rec: 
 query failed (SERVFAIL) for 
 5.2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.1.0.0.0.1.0.0.0.pasilehto.fi/IN/A at 
 query.c:7519
 

Ok. Now I didn't have the empty non-terminals 

0.pasilehto.fi
0.0.pasilehto.fi
0.0.0.pasilehto.fi

thank you so much for confirming this. 

 Tony.
 -- 
 f.anthony.n.finch  d...@dotat.at  http://dotat.at/
 Malin, Hebrides: Southeast 5 to 7, occasionally gale 8, veering west or
 southwest 5 or 6 later. Moderate or rough, becoming rough or very rough.
 Showers then rain. Good, becoming moderate or poor.


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Re: bind-users Digest, Vol 1766, Issue 2

2014-02-19 Thread Barry S. Finkel

markus weber bumpemacve...@googlemail.com wrote:


Hey Guys,

I am new to administer a Bind server and after a few problems i ran into i
need to monitor the zonefile transfers of my slave server.
I have searched on google and nagios plugin sites but could not find
anything that fits my needs entirely.

Here is the Setup:
- MS ActiveDirectory as primary Nameservers (not under my control)
- 2 Bind server as slave for various zones (behind a loadbalancer)

The problem i ran into, was that the zone transfer didn't work for some
reason and the zone we hold expired causing our mailgateway to stop
relaying mails :/

As i sayed i googled around and as i could not find anything i hacked a
nagios plugin myself ( you can find the code here
https://github.com/seppovic/Nagios-plugins/blob/master/libexec/check_dns_zonetransfer.pl).
But i am curious if i took the right route. These are my assumptions and
a first approach:

- read named.conf and get master servers
- query soa of slave and get serial
- query first master and get serial
- if serial match:
 get zonefile modification time (not sure if this is significant)
and compare it with localtime and soa-expiretime
 + warn or crit on threshold
 (stat($zoneFile)[9] + $SOA_S-expire) - time
- if master serial  slave serial
 create tempfile and check for how long it stays lower then masters
serial
 + warn or crit on threshold
- else
 test next master
 on last master exit with error ( this should not become true ever,
right?)


A few problems i discovered:
- sometimes have a higher serial then all masters have, is this normal on
an AD DNS? or am I doing something wrong i thought this could not happen.
- Some Zones nearly always reach expireation time. and i get a lot of
critical messages and a few hours/minutes before expireation it does the
update.

i hope you can guide me a bit and tell me if this is what i want xD

many thanks in advance
seppovic


When I had BIND slaves of zones mastered on Windows Domain Controller
DNS Servers, the problem I had was that Microsoft in the EventLog only
logged successful zone transfers.  I told MS (in a conversation with one
of the DNS developers) that I needed failed zone transfers to be logged
along with the reason for the refused transfer.  The response from the
developer was that MS did not want all of the failed zone transfers
filling up the EventLog.  In my case, there were lots of unnecessary
successful zone transfers, but if one failed, I had no way of knowing
why.  There might have been information in the Windows dns.log file
(where I had complete logging), but when that file got to its max size,
MS would clear the file and start again, losing all of the information.

--Barry Finkel

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Re: Re: Monitoring Zonefiletransfer

2014-02-19 Thread Barry S. Finkel



A few problems i discovered:
- sometimes have a higher serial then all masters have, is this normal on
an AD DNS? or am I doing something wrong i thought this could not happen.



Only transfer from one AD master.  Microsoft AD doesn't maintain
consistent serials across the servers.  The serials should be
monotonically increasing from a individual server.



And when I had BIND slaves for AD masters, when patches were being
applied to the Domain Controllers (i.e., the ONE DC that I had
selected as a master), a zone serial number would decrease.  In most
(but not all) cases, after the DC patching was finished, the zone
serial number would go back to normal.  I was not allowed to open a
trouble ticket with Microsoft.  Every morning at 7AM I ran a cron to
capture the zone serial numbers on all of the 44+ AD zones on all my
BIND DNS servers.

(I just realized that in my post about a half-hour ago on this
subject, I had forgotten to change the Subject: line from the
digest).

--Barry Finkel
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Re: Monitoring Zonefiletransfer

2014-02-19 Thread Barry S. Finkel

Only transfer from one AD master.  Microsoft AD doesn't maintain
consistent serials across the servers.  The serials should be
monotonically increasing from a individual server.



Oh, i didn't know that. Thats weird behavior isn't it? I will give it
definitely a try, I just added 3 of those servers to Masters option
because i thought it would increase the reliability in case of an error.



See MS KB article 282826, where MS documents the handling of zone
serial numbers in an AD environment.

--Barry Finkel

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RE: intermittent resolving problem for some domains

2014-02-19 Thread Daniel Dawalibi
Hello

I am able to reach the root servers and I can resolve other domains.



;  DiG 9.8.0  . ns
;; global options: +cmd
;; Got answer:
;; -HEADER- opcode: QUERY, status: NOERROR, id: 32217
;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.  IN  NS

;; ANSWER SECTION:
.   518187  IN  NS  i.root-servers.net.
.   518187  IN  NS  d.root-servers.net.
.   518187  IN  NS  g.root-servers.net.
.   518187  IN  NS  f.root-servers.net.
.   518187  IN  NS  m.root-servers.net.
.   518187  IN  NS  h.root-servers.net.
.   518187  IN  NS  j.root-servers.net.
.   518187  IN  NS  c.root-servers.net.
.   518187  IN  NS  b.root-servers.net.
.   518187  IN  NS  l.root-servers.net.
.   518187  IN  NS  e.root-servers.net.
.   518187  IN  NS  a.root-servers.net.
.   518187  IN  NS  k.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net. 604587  IN  A   198.41.0.4
a.root-servers.net. 604603  IN  2001:503:ba3e::2:30
b.root-servers.net. 604587  IN  A   192.228.79.201
c.root-servers.net. 604587  IN  A   192.33.4.12
d.root-servers.net. 604767  IN  A   199.7.91.13
d.root-servers.net. 604767  IN  2001:500:2d::d
e.root-servers.net. 604587  IN  A   192.203.230.10
f.root-servers.net. 604587  IN  A   192.5.5.241
f.root-servers.net. 604587  IN  2001:500:2f::f
g.root-servers.net. 604587  IN  A   192.112.36.4
h.root-servers.net. 604587  IN  A   128.63.2.53
h.root-servers.net. 604587  IN  2001:500:1::803f:235
i.root-servers.net. 604765  IN  A   192.36.148.17
i.root-servers.net. 604765  IN  2001:7fe::53

;; Query time: 2 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Feb 19 16:38:34 2014
;; MSG SIZE  rcvd: 512



Best Regards,
Daniel Dawalibi
-Original Message-
From: Niall O'Reilly [mailto:niall.orei...@ucd.ie] 
Sent: Wednesday, February 19, 2014 1:22 PM
To: Daniel Dawalibi
Cc: bind-users@lists.isc.org
Subject: Re: intermittent resolving problem for some domains

At Wed, 19 Feb 2014 00:33:11 +0200,
Daniel Dawalibi wrote:
 
 Kindly note that the number of recursive clients is increasing during 
 the problem : recursive clients: 3700/14900/15000

  I think it's likely that you have a connectivity problem.

  I'ld suggest checking whether your server which is giving these
  messages can reach any of the root servers or even any of the
  external Internet.

  Best regards,
  Niall O'Reilly

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Re: Monitoring Zonefiletransfer

2014-02-19 Thread Warren Kumari
On Tue, Feb 18, 2014 at 10:34 PM, /dev/rob0 r...@gmx.co.uk wrote:
 On Tue, Feb 18, 2014 at 11:44:15PM +0100, markus weber wrote:
 I am new to administer a Bind server and after a few problems i ran
 into i need to monitor the zonefile transfers of my slave server.

 I think the terminology you use shows a part of the confusion. Zone
 *data* is transferred to slave servers, not zone *files.*

Well, yes and no...

Yes, the zone data is transferred, not the zone file -- but, isn't
this kindaof sorta true of any copy operation?

If I copy (or transfer) a file from one machine to another, it's not
that I'm actually transferring the file, I'm creating a new file on
the destination and copying the contents into it. And if the hard
drive architecture of the destination machine is different to the
source (or perhaps if the architectures are different endianness) the
destination blob of magnetic bits is subtly different. The files still
*mean* the same thing, but the encoding is altered...

Same thing if I placed a color photo on a black and white photocopier
-- I would be able to quite happily say that I transferred the image
to a new piece of paper (actually I'd just say that I copied it...),
but I didn't really -- I transferred a close enough approximation of
the image.

So, yes, a zone file itself isn't copied, the contents are -- and the
files themselves probably won't be binary identical[0] (especially in
the case of bind raw vs text formats!), but semantically will, and
that's the important bit.

But yes, I know what you means, I'm just feeling a bit pedantic this morning

W



 I have searched on google and nagios plugin sites but could not
 find anything that fits my needs entirely.

 Here is the Setup:
 - MS ActiveDirectory as primary Nameservers (not under my control)
 - 2 Bind server as slave for various zones (behind a loadbalancer)

 The problem i ran into, was that the zone transfer didn't work for
 some reason and the zone we hold expired causing our mailgateway to
 stop relaying mails :/

 As i sayed i googled around and as i could not find anything i
 hacked a nagios plugin myself ( you can find the code here
 https://github.com/seppovic/Nagios-plugins/blob/master/libexec/check_dns_zonetransfer.pl).
 But i am curious if i took the right route. These are my
 assumptions and a first approach:

 - read named.conf and get master servers
 - query soa of slave and get serial

 If query is something like dig +short zone.example. soa @slave,
 right.

 - query first master and get serial

 Likewise here, s/slave/master/

 - if serial match:
get zonefile modification time (not sure if this is significant)

 It is not. Zone data is kept in memory and is written to the journal.
 At 15-minute intervals, the zone file is written if it differs from
 actual zone data.

 and compare it with localtime and soa-expiretime
 + warn or crit on threshold
 (stat($zoneFile)[9] + $SOA_S-expire) - time
 - if master serial  slave serial
 create tempfile and check for how long it stays lower
 then masters serial
 + warn or crit on threshold
 - else
 test next master
 on last master exit with error ( this should not become
 true ever, right?)


 A few problems i discovered:
 - sometimes have a higher serial then all masters have, is this
 normal on an AD DNS? or am I doing something wrong i thought this
 could not happen.
 - Some Zones nearly always reach expireation time. and i get a lot
 of critical messages and a few hours/minutes before expireation it
 does the update.

 Not enough here to know what's going on.

 i hope you can guide me a bit and tell me if this is what i want xD
 --
   http://rob0.nodns4.us/
   Offlist GMX mail is seen only if /dev/rob0 is in the Subject:
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Re: Monitoring Zonefiletransfer

2014-02-19 Thread Dave Warren

On 2014-02-19 16:06, Barry S. Finkel wrote:


See MS KB article 282826, where MS documents the handling of zone
serial numbers in an AD environment.



My experience is that it tends to work pretty well if BIND only points 
to one particular MS DNS server at a time, with a failover script that 
detects when that DNS server goes down and flips to another master (if 
you're worried about such things)


That being said, even without that script and with multiple MS DNS 
masters configured in BIND at once, any issues generally work themselves 
out within 15 minutes or so, once the Active Directory serial number 
update propagates through the MS DNS infrastructure. As described in the 
article, the servers self-increment properly when a slave is detected, 
and occasionally sync up the serial numbers between MS DNS servers 
(again, only moving update).


The only inconsistencies are in those recently added/modified records, 
so if you just plan for 15 minute update times for non-MS secondaries to 
sync up and ignore the periodic serial is lower than expected 
warnings, multi-mastering works fine in practice.


--
Dave Warren
http://www.hireahit.com/
http://ca.linkedin.com/in/davejwarren


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Re: how to modify the cache

2014-02-19 Thread Kevin Darcy
Not a good solution. Even under normal circumstances, there will be 
temporary bottlenecks, dropped packets, etc.. that will trigger failover 
and users will get different answers at different times. Not good for 
support, maintainability, user experience/satisfaction, etc.


If all you want is resilience, and you own/control the domain in 
question, why not just slave it (stealth slave, i.e. you don't need to 
publish it in the NS records)?


If you *don't* own/control the domain in question, what business do you 
have standing up a fake version of it in your own infrastructure? Not 
a best practice.


- Kevin
On 2/19/2014 4:51 AM, houguanghua wrote:

Steven,

Your solution is very good. It can forward the queries to 
the specified name servers first.


But if the specified name server is enabled only when normal dns query 
process is down. How to configure the local DNS server? The detailed 
scenario is descibed in below figure:



--
   |Root |
   | nameServer |
 /  -
 (2)/
   /
 --    -
| Client | __(1)\ |   Local | ___(3)_\ | 
Authority|
| Resolver | / | DNS Server |   X   / | DNS 
Server  |

 -- -
   \
\(4)
 \
  \  
|  Hidden  |
| DNS Server |
 
Normally,
  1) A internet user wants to access www.abc.com http://www.abc.com, 
a DNS request is sent to local DNS server
  2) Local DNS server queries the root name server, the .com name 
server to get the Authority Name Server of abc.com

 3) local DNS server queries the Authority name server, and gets the IP

But when the Authority name server is down, the internet user won't 
get  the IP address.  My solution is as follows:
 a) A hidden name server with low performance is deployed. When 
authority name server can't be accessed, local dns server will access 
the hidden server.
 b)The hidden server is never used in normal situation. It act as 
a cold backup for authority name server.
 c) The zone file in the hidden server is the same as that 
configuration in the authority name server
 d) The hidden name server doesn't appear in the NS records 
of  authority name server


Btw, all above doesn't consider the cache in the local dns server.


 Best Regards,
Guanghua


 Date: Mon, 17 Feb 2014 09:09:13 +
 Subject: Re: how to modify the cache
 From: sjc...@gmail.com
 To: houguang...@hotmail.com
 CC: bind-users@lists.isc.org

 On 17 February 2014 01:17, houguanghua houguang...@hotmail.com wrote:
  I want to override the IP address of NS, for I want to use other 
authority

  DNS which isn't registered.

 For that you use forwarding. Create a zone statement for the zone in
 question and forward the queries to a different name server. You don't
 need to mess with the cache.

 https://mknowles.com.au/wordpress/2009/07/20/bind-forwarding-zone/


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Difference between BIND 9.8 and 9.9

2014-02-19 Thread BONNET, Frank
Hello

is there a link to a documentation that lists the main differences between
BIND 9.8 and 9.9 ?

I would like to read it before swiching from 9.8

thank you
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Converting an inline-signed zone to unsigned

2014-02-19 Thread Chris Thompson

What is the right way ... or maybe I should be asking IS there a right
way ... to change a zone that has been signed by inline signing (i.e. with
inline-signing yes; auto-dnssec maintain; in it zone statement) to unsigned?

When I change the zone statement to remove the inline signing part, and
update the SOA serial in the zone file for good measure, and then do
either rndc reload or rndc reconfig, I get messages like

named[22954]: general: error: zone playground.test/IN:
  journal rollforward failed: journal out of sync with zone
named[22954]: general: error: zone playground.test/IN:
  not loaded due to errors.

and the zone goes into SERVFAIL state.

The only way I found out of this was to remove the [zone-file].signed
and [zone-file].signed.jnl files manually, and *then* do rndc reconfig.
Surely there must be something better than that?

--
Chris Thompson
Email: c...@cam.ac.uk
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Re: Difference between BIND 9.8 and 9.9

2014-02-19 Thread Mike Hoskins (michoski)
From:  BONNET, Frank frank.bon...@esiee.fr
Date:  Wednesday, February 19, 2014 at 12:41 PM
To:  bind-users@lists.isc.org bind-users@lists.isc.org
Subject:  Difference between BIND 9.8 and 9.9

Hello

is there a link to a documentation that lists the main differences
between BIND 9.8 and 9.9 ?

I would like to read it before swiching from 9.8

thank you


I generally browse the release notes.

https://kb.isc.org/category/81/0/10/Software-Products/BIND9/Release-Notes/

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Re: Difference between BIND 9.8 and 9.9

2014-02-19 Thread /dev/rob0
On Wed, Feb 19, 2014 at 06:00:42PM +, Mike Hoskins (michoski) wrote:
 From:  BONNET, Frank frank.bon...@esiee.fr
 is there a link to a documentation that lists the main differences
 between BIND 9.8 and 9.9 ?
 
 I would like to read it before swiching from 9.8
 
 I generally browse the release notes.
 
 https://kb.isc.org/category/81/0/10/Software-Products/BIND9/Release-Notes/

Note as well that 9.9 is the current Extended Support Version. BIND9 
version 9.10 is presently in alpha, probably soon to be beta, so 
depending on your needs that could be another branch to consider.
-- 
  http://rob0.nodns4.us/
  Offlist GMX mail is seen only if /dev/rob0 is in the Subject:
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Re: intermittent resolving problem for some domains

2014-02-19 Thread Alan Clegg
On 2/19/14, 1:33 AM, Daniel Dawalibi wrote:

 Kindly note that the number of recursive clients is increasing during
 the problem : recursive clients: 3700/14900/15000

rndc recursing and look to see what is plugging up your pipes.

AlanC



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Re: Converting an inline-signed zone to unsigned

2014-02-19 Thread Alan Clegg
On 2/19/14, 8:59 PM, Chris Thompson wrote:
 What is the right way ... or maybe I should be asking IS there a right
 way ... to change a zone that has been signed by inline signing (i.e. with
 inline-signing yes; auto-dnssec maintain; in it zone statement) to
 unsigned?
 
 When I change the zone statement to remove the inline signing part, and
 update the SOA serial in the zone file for good measure, and then do
 either rndc reload or rndc reconfig, I get messages like
 
 named[22954]: general: error: zone playground.test/IN:
   journal rollforward failed: journal out of sync with zone
 named[22954]: general: error: zone playground.test/IN:
   not loaded due to errors.
 
 and the zone goes into SERVFAIL state.
 
 The only way I found out of this was to remove the [zone-file].signed
 and [zone-file].signed.jnl files manually, and *then* do rndc reconfig.
 Surely there must be something better than that?
 

Have you tried setting dnssec-secure-to-insecure then setting all of
the keys to deleted?

AlanC



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Re: Monitoring Zonefiletransfer

2014-02-19 Thread Barry S. Finkel

On 2014-02-19 16:06, Barry S. Finkel wrote:


See MS KB article 282826, where MS documents the handling of zone
serial numbers in an AD environment.


And Dave Warren replied:


My experience is that it tends to work pretty well if BIND only points
to one particular MS DNS server at a time, with a failover script that
detects when that DNS server goes down and flips to another master (if
you're worried about such things)

That being said, even without that script and with multiple MS DNS
masters configured in BIND at once, any issues generally work themselves
out within 15 minutes or so, once the Active Directory serial number
update propagates through the MS DNS infrastructure. As described in the
article, the servers self-increment properly when a slave is detected,
and occasionally sync up the serial numbers between MS DNS servers
(again, only moving update).

The only inconsistencies are in those recently added/modified records,
so if you just plan for 15 minute update times for non-MS secondaries to
sync up and ignore the periodic serial is lower than expected
warnings, multi-mastering works fine in practice.

-- Dave Warren



That MS KB article states that if a Domain Controller DNS Server is
not used as a master for a slave server, then the zone serial number
is irrelevant.  But if the Server is used as a master, then the serial
number is relevant.  Assume one zone that is mastered on two DCs, and
the two serial numbers match (and the serial is N).  A dynamic update
for the zone is sent to DC1, and the serial number there is increased to
N+1.  At the same time a different dynamic update for the zone is sent
to DC2, and DC2 then has serial number N+1.  The two copies of the zone
are different, but they both have the same serial number.  When Active
Directory synchronizes the zone, what serial number can it use for the
synched zone?  It can't use N+1, because that serial has been used, and
the zone might have already been transferred to the slave server.
It can't be N+2, because, in the meantime, another dynamic update may
have come to DC1 or DC2, so serial N+2 might have already been used.

Another thing that I hinted in an earlier reply - With AD zones, the
serial number can increase unnecessarily.   In the past, when a
dynamic DNS update was sent to a DC, and that update was already in DNS
(e.g., a re-lease of a DHCP address), the Windows DNS Server code
treated the update as a no-op, except for updating an internal timestamp
in the zone.  But sometime later, MS changed the code, so that the
dynamic DNS update is no longer treated as a no-op.  This causes

1) the DNS update to be initially refused because it does not have
   TSIG authorization, and the client (or DHCP Server) has to re-send
   the update.

2) the zone serial number is updated, even when there is no update to
   the zone; this causes unnecessary zone transfers.

--Barry Finkel
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whois expiration limit?

2014-02-19 Thread Lightner, Jeff
Hi,  I know this is the BIND list but I’m thinking folks who deal with DNS 
probably may be able to answer this question about whois.

We recently transferred and renewed a domain by 2 years which pushed its 
expiration to 01/25/2025.   The order confirmation shows that expiration and 
looking at the domain at the Registrar’s web site under our account it shows 
that expiration as well.   However, when running whois both here and at the 
Registrar’s site it shows expiration 01/25/2024.  It makes me wonder if there 
is a 10 year limit in whois since 2024 would be within 10 years but 2025 would 
be outside of it.

I didn’t see anything in RFC 3912 describing whois that even suggests a limit 
for expirations dates.

Not a big deal as I may be dead by then either way – just wondering if anyone 
knows of a reason this would occur.

Please don’t suggest I contact the Registrar.  I already did and they seemed as 
clueless as I am.










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Re: whois expiration limit?

2014-02-19 Thread bind

On Wed, 19 Feb 2014, Lightner, Jeff wrote:

Hi, I know this is the BIND list but I???m thinking folks who deal with 
DNS probably may be able to answer this question about whois.


We recently transferred and renewed a domain by 2 years which pushed its 
expiration to 01/25/2025.  The order confirmation shows that expiration 
and looking at the domain at the Registrar???s web site under our 
account it shows that expiration as well.  However, when running whois 
both here and at the Registrar???s site it shows expiration 01/25/2024. 
It makes me wonder if there is a 10 year limit in whois since 2024 would 
be within 10 years but 2025 would be outside of it.


I didn???t see anything in RFC 3912 describing whois that even suggests 
a limit for expirations dates.


Not a big deal as I may be dead by then either way ??? just wondering if 
anyone knows of a reason this would occur.


Please don???t suggest I contact the Registrar.  I already did and they 
seemed as clueless as I am.


Just anecdotally, but I have seen a 10 year limit on registration/renewal, 
before.  I believe CIRA only allows that, generally.


Not sure of a more appropriate list, either, so figured I'd respond here.___
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Re: whois expiration limit?

2014-02-19 Thread Dave Warren

On 2014-02-19 20:44, Lightner, Jeff wrote:


Hi,  I know this is the BIND list but I’m thinking folks who deal with 
DNS probably may be able to answer this question about whois.


We recently transferred and renewed a domain by 2 years which pushed 
its expiration to 01/25/2025. The order confirmation shows that 
expiration and looking at the domain at the Registrar’s web site under 
our account it shows that expiration as well.   However, when running 
whois both here and at the Registrar’s site it shows expiration 
01/25/2024.  It makes me wonder if there is a 10 year limit in whois 
since 2024 would be within 10 years but 2025 would be outside of it.


I didn’t see anything in RFC 3912 describing whois that even suggests 
a limit for expirations dates.


Not a big deal as I may be dead by then either way – just wondering if 
anyone knows of a reason this would occur.


Please don’t suggest I contact the Registrar.  I already did and they 
seemed as clueless as I am.




http://www.icann.org/en/resources/compliance/faqs#7

Each registrar has the flexibility to offer initial and renewal 
registrations in one-year increments, provided that the maximum 
remaining unexpired term shall not exceed ten years.


In reality, they'll probably issue the renewal automagically once you're 
under the 9-year mark and the domain is renewal-eligible.


--
Dave Warren
http://www.hireahit.com/
http://ca.linkedin.com/in/davejwarren

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RE: whois expiration limit?

2014-02-19 Thread Lightner, Jeff
Thanks.  My thinking was the limit was on the whois database since the 
Registrar was telling me it was registered for more than 10 years.

It appears based on this Registration FAQ regarding “compliance” that the 
registrar may simply be showing it as 2024 because they can’t really report 
2025 and be in compliance.

I was just having a hard time finding anything that mentioned the 10 year limit 
even though it seemed likely that was the issue.

Hopefully you’re correct that the Registrar will automatically adjust it before 
2024.   I’ll set myself a reminder for next year and prompt them if they don’t 
automatically update it themselves so we don’t have to remember in 2024 that we 
already paid for another year.






From: bind-users-bounces+jlightner=water@lists.isc.org 
[mailto:bind-users-bounces+jlightner=water@lists.isc.org] On Behalf Of Dave 
Warren
Sent: Wednesday, February 19, 2014 4:17 PM
To: bind-users@lists.isc.org
Subject: Re: whois expiration limit?

On 2014-02-19 20:44, Lightner, Jeff wrote:
Hi,  I know this is the BIND list but I’m thinking folks who deal with DNS 
probably may be able to answer this question about whois.

We recently transferred and renewed a domain by 2 years which pushed its 
expiration to 01/25/2025.   The order confirmation shows that expiration and 
looking at the domain at the Registrar’s web site under our account it shows 
that expiration as well.   However, when running whois both here and at the 
Registrar’s site it shows expiration 01/25/2024.  It makes me wonder if there 
is a 10 year limit in whois since 2024 would be within 10 years but 2025 would 
be outside of it.

I didn’t see anything in RFC 3912 describing whois that even suggests a limit 
for expirations dates.

Not a big deal as I may be dead by then either way – just wondering if anyone 
knows of a reason this would occur.

Please don’t suggest I contact the Registrar.  I already did and they seemed as 
clueless as I am.

http://www.icann.org/en/resources/compliance/faqs#7

Each registrar has the flexibility to offer initial and renewal registrations 
in one-year increments, provided that the maximum remaining unexpired term 
shall not exceed ten years.

In reality, they'll probably issue the renewal automagically once you're under 
the 9-year mark and the domain is renewal-eligible.



--

Dave Warren

http://www.hireahit.com/

http://ca.linkedin.com/in/davejwarren







Athena®, Created for the Cause™

Making a Difference in the Fight Against Breast Cancer





How and Why I Should Support Bottled Water!
Do not relinquish your right to choose bottled water as a healthy alternative 
to beverages that contain sugar, calories, etc. Your support of bottled water 
will make a difference! Your signatures count! Go to 
http://www.bottledwatermatters.org/luv-bottledwater-iframe/dswaters and sign a 
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Re: how to hidden the salve

2014-02-19 Thread houguanghua



Stealth slave doesn't fully meet the requirement.  It's just part of the 
requirement  to not publish the slave name server in the NS records. Further 
more, the 'stealth' slave is quired by local DNS server only when all name 
servers in the NS records are out of service ( maybe in case of ddos attack). 
Guanghua  --
On 2/19/2014 11:54  AM,  Kevin wrote: 
Date: Wed, 19 Feb 2014 11:54:44 -0500
From: Kevin Darcy k...@chrysler.com
To: bind-users@lists.isc.org
Subject: Re: how to modify the cache
Message-ID: 5304e1d4.5000...@chrysler.com

Not a good solution. Even under normal circumstances, there will be 
temporary bottlenecks, dropped packets, etc.. that will trigger failover 
and users will get different answers at different times. Not good for 
support, maintainability, user experience/satisfaction, etc.
 
If all you want is resilience, and you own/control the domain in 
question, why not just slave it (stealth slave, i.e. you don't need to 
publish it in the NS records)?
 
If you *don't* own/control the domain in question, what business do you 
have standing up a fake version of it in your own infrastructure? Not 
a best practice.
 
 - Kevin
On 2/19/2014 4:51 AM, houguanghua wrote:
 Steven,

 Your solution is very good. It can forward the queries to 
 the specified name servers first.

 But if the specified name server is enabled only when normal dns query 
 process is down. How to configure the local DNS server? The detailed 
 scenario is descibed in below figure:



  --
  |Root 
   |  

| nameServer |

/  -

   ②/   

   /
   --  ---  
-
 | Client | __①\ |   Local  | 
___③_\ |  Authority  |  
 | Resolver |/ | DNS Server |X  
   / | DNS Server  |
   --   
  -

   \ 

 \④

   \

 \   

 |  Hidden   |

 | DNS Server |

 
 Normally,
   1) A internet user wants to access www.abc.com http://www.abc.com, 
 a DNS request is sent to local DNS server
   2) Local DNS server queries the root name server, the .com name 
 server to get the Authority Name Server of abc.com
  3) local DNS server queries the Authority name server, and gets the IP

 But when the Authority name server is down, the internet user won't 
 get  the IP address.  My solution is as follows:
  a) A hidden name server with low performance is deployed. When 
 authority name server can't be accessed, local dns server will access 
 the hidden server.
  b)The hidden server is never used in normal situation. It act as 
 a cold backup for authority name server.
  c) The zone file in the hidden server is the same as that 
 configuration in the authority name server
  d) The hidden name server doesn't appear in the NS records 
 of  authority name server

 Btw, all above doesn't consider the cache in the local dns server.


  Best Regards,
 Guanghua


  Date: Mon, 17 Feb 2014 09:09:13 +
  Subject: Re: how to modify the cache
  From: sjc...@gmail.com
  To: houguang...@hotmail.com
  CC: bind-users@lists.isc.org
 
  On 17 February 2014 01:17, houguanghua houguang...@hotmail.com wrote:
   I want to override the IP address of NS, for I want to use other 
 authority
   DNS which isn't registered.
 
  For that you use forwarding. Create a zone statement for the zone in
  question and forward the queries to a different 

Re: whois expiration limit?

2014-02-19 Thread Dave Warren

On 2014-02-19 23:29, Lightner, Jeff wrote:


Thanks.  My thinking was the limit was on the whois database since the 
Registrar was telling me it was registered for more than 10 years.


It appears based on this Registration FAQ regarding “compliance” that 
the registrar may simply be showing it as 2024 because they can’t 
really report 2025 and be in compliance.





Just to be clear, it's not about showing something different for 
compliance, the domain is only registered for 9.something years, full stop.


ICANN/Internic is the ultimate authority within their gTLD roots, 
everyone else is just a reseller, so at this point you've been sold 
something they're unable to deliver -- But since they can deliver it 
over time, it should work itself out.


In other words, what you have is a domain for 9 years, and the promise 
of one more. That's fair, most service contacts are based on one party 
or the other doing something and the other promising to do something later.


Luckily registrars don't have much of an incentive to jerk people 
around, saving themselves $9 isn't worth the lawsuit and potential loss 
of accreditation.




--
Dave Warren
http://www.hireahit.com/
http://ca.linkedin.com/in/davejwarren

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