Larry Vaden wrote: > 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 > 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 > [redacted at catch22 etc]# > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >