Larry Vaden wrote:
On Thu, Apr 15, 2010 at 3:53 PM, Scott Silva ssilva@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@unixmail.co.uk wrote:
Larry Vaden wrote:
On Thu, Apr 15, 2010 at 3:03 PM, Ned Slider ned@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@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
Well adding the -a option to host shows that the answer is not authoritative, so the query is being forwarded.
host -a 251.54.51.173.zen.spamhaus.org 208.67.222.222
Trying "251.54.51.173.zen.spamhaus.org"
Using domain server:
Name: 208.67.222.222
Address: 208.67.222.222#53
Aliases:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23703
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;251.54.51.173.zen.spamhaus.org. IN ANY ;; ANSWER SECTION: 251.54.51.173.zen.spamhaus.org. 893 IN A 127.0.0.10 251.54.51.173.zen.spamhaus.org. 893 IN A 127.0.0.4
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