--On Tuesday, July 15, 2014 10:00 PM +0000 Jeremy McSpadden
<jer...@fluxlabs.net> wrote:
Run a DNS server on your rack space servers. If your using rack space DNS
your rbl queries are more than likely going to cause quite a few FPs.
Never good to use ISP or hosting DNS servers.
As I said... I *already* run my own DNS in rackspace. I *already* run my
own caching nameserver too on my MTAs. That has ZERO to do with lookups
against domains I don't host directly.
I.e., *any* DNS request that goes through my DNS servers that then must go
OUTBOUND hits the appliance on the rackspace network. 10.110.0.108 is *my*
DNS server:
For example, internal lookup (does not require going outbound):
[quanah@mbs01 ~]$ time nslookup www.zimbra.com
Server: 10.110.0.108
Address: 10.110.0.108#53
Non-authoritative answer:
www.zimbra.com canonical name = lb-www.zimbra.com.
Name: lb-www.zimbra.com
Address: 10.80.1.88
real 0m0.011s
user 0m0.002s
sys 0m0.009s
External lookup (requires going outbound) 1st time:
[quanah@mbs01 ~]$ time nslookup www.alltheweb.com
;; connection timed out; trying next origin
Server: 10.110.0.108
Address: 10.110.0.108#53
** server can't find www.alltheweb.com: NXDOMAIN
real 0m18.008s
user 0m0.001s
sys 0m0.004s
External lookup (requires going outbound) 2nd time:
[quanah@mbs01 ~]$ time nslookup www.alltheweb.com
Server: 10.110.0.108
Address: 10.110.0.108#53
Non-authoritative answer:
www.alltheweb.com canonical name = rc.yahoo.com.
rc.yahoo.com canonical name = src.g03.yahoodns.net.
src.g03.yahoodns.net canonical name = any-src.a03.yahoodns.net.
Name: any-src.a03.yahoodns.net
Address: 74.6.50.150
real 0m5.619s
user 0m0.004s
sys 0m0.007s
External lookup (requires going outbound) 3rd time:
[quanah@mbs01 ~]$ time nslookup www.alltheweb.com
Server: 10.110.0.108
Address: 10.110.0.108#53
Non-authoritative answer:
www.alltheweb.com canonical name = rc.yahoo.com.
rc.yahoo.com canonical name = src.g03.yahoodns.net.
src.g03.yahoodns.net canonical name = any-src.a03.yahoodns.net.
Name: any-src.a03.yahoodns.net
Address: 74.6.50.150
real 0m0.011s
user 0m0.005s
sys 0m0.005s
--Quanah
--
Quanah Gibson-Mount
Server Architect
Zimbra, Inc.
--------------------
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