[CentOS] Apparent BIND problem doing RBL lookups for Postfix

Larry Vaden larry.vaden at gmail.com
Thu Apr 15 21:09:34 UTC 2010


On Thu, Apr 15, 2010 at 3:53 PM, Scott Silva <ssilva at sgvwater.com> wrote:
> on 4-15-2010 1:36 PM Larry Vaden spake the following:
>> On Thu, Apr 15, 2010 at 3:18 PM, Ned Slider <ned at unixmail.co.uk> wrote:
>>> Larry Vaden wrote:
>>>> On Thu, Apr 15, 2010 at 3:03 PM, Ned Slider <ned at unixmail.co.uk> wrote:
>>>>> Changing dns to public services such as google or OpenDNS is not going
>>>>> to help as DNSBLs like Spamhaus will have blocked access by these
>>>>> services. Otherwise it would be simple to avoid paying for (business)
>>>>> access to Spamhaus.
>>>>
>>>> Au contraire, there are benefits/economies of scale to spamhaus.org
>>>> from having an aggregator like opendns.
>>>>
>>>
>>> Indeed, but not if you are charging for high volume and/or commercial use.
>>
>> opendns resolves queries to zen.spamhaus.org and AFAIK all the major
>> DNSBLs.  Period.  End.
>>
>> kind regards/ldv

> Resolves them, or forwards them? Just curious...

Avoiding answering your question because of lack of expertise in the
difference of resolving vs. forwarding, but (IP taken from a recent
(Apr 15 16:01:25 CT) postfix NOQUEUE):

[redacted at catch22 etc]# host 251.54.51.173.zen.spamhaus.org 208.67.222.222
Using domain server:
Name: 208.67.222.222
Address: 208.67.222.222#53
Aliases:

251.54.51.173.zen.spamhaus.org has address 127.0.0.10
251.54.51.173.zen.spamhaus.org has address 127.0.0.4
[redacted at catch22 etc]#



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