qmail issue

[András DORN]

Mark Andrews wrote:
>>>>A "deferral: CNAME_lookup_failed_temporarily._(#4.4.3)" log entry has
>>>>been created, when the sender
>>>>is using qmail to send us an email.
>>>>
>>>>Here is some interesting link found by google:
>>>>http://www.faqts.com/knowledge_base/view.phtml/aid/28942
>>>>http://www.cyber-sentry.com/index.php?id=58
>>>>        
>>>>
>>>I think this problem is a qmail problem.  I am not a qmail guy... sorry...
>>>      
>>>
>>Yes, it is a qmail "feature", but if could decrease my repsonses less 
>>than 500 byte this "feature" will not be problem anymore.
>>
>>Best wishes,
>>Andras
>>
>>    
>>
>>>dave...
>>>
>>>      
>>>
>
>	Do you have a firewall sitting in front of the nameserver
>	that is performing statefull inspection of DNS queries?
>  
>
How could I test the UDP responses by myself? Should I capture and 
analyze the all traffic or could I find
a special tool? How could I make the "ANY" query (if "any" means a 
special type of query)?
Any FAQ or doc are welcome.:)

>	The reason I ask this is that the server is not responding
>	to DNS/UDP ANY queries for the two domains but does respond
>	to DNS/TCP ANY queries and there are firewalls that are
>	known to examine DNS/UDP but not examine DNS/TCP.
>
>	Note neither response to the ANY queries would exceed 512 bytes.
>
>	Mark
>--
>Mark Andrews, ISC
>1 Seymour St., Dundas Valley, NSW 2117, Australia
>PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews at isc.org
>
>
>
>  
>


-- 
DORN András -- dorn at ktk.bme.hu
Budapesti Mu"szaki és Gazdaságtudományi Egyetem 
--
András DORN -- dorn at ktk.bme.hu
Budapest University of Technology and Economics
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