Verizon transparent web caching issue? WASRe: Data Center QoS equipment breaking http 1.1?
up at 3.am
up at 3.am
Sat Aug 1 01:06:03 UTC 2009
Again, turned out to be my own stupidity. It was just DNS on a secondary
DNS server, which was pointing to the old IP, which was redirecting to the
new IP, but at that point, the headers are lost.
I would have thought that on MacOSX (my client; the server is FreeBSD
7.2-STABLE), if I tell the /etc/resolv.conf to look at the primary name
server only, which has the correct info, plus doing a dnscacheutil
-flushcache, that this wouldn't be an issue.
Apparently, I was wrong, or perhaps it doesn't override what Verizon does
with my browser's queries, despite what nslookup shows in a terminal
window.
On Fri, 31 Jul 2009, up at 3.am wrote:
>
> Disregard my disregard. The problem resurfaced with no changes on my part.
> I purged browser caches and tried them from 3 browsers and each time:
>
> http://www.countytheater.org
>
> redirected to: http://webmail.ns3.pil.net/ which is another NameVhost on
> that server sharing that IP. This is incorrect. However, I then switch from
> a Verizon connection to an ATT 3g connection on the IPhone and the problem
> goes away.
>
> Has anyone heard of upstream transparent caching issues causing this kind of
> problem? Does anyone else here get the redirect instead of the correct page?
>
> TIA
>
> On Fri, 31 Jul 2009, up at 3.am wrote:
>
>>
>> Please disregard this idiocy of mine...it appears that the Apache
>> UseCanonicalName directive selectively breaks some NameVirtualHosts, while
>> leaving others unscathed, but turning it off fixed it anyway.
>>
>> On Fri, 31 Jul 2009, up at 3.am wrote:
>>
>>>
>>> Sorry if this is a little OT, but we're seeing a serious problem and was
>>> wondering if it is what I think it is.
>>>
>>> In short: I have been moving services off of our servers in a data center
>>> onto a server at eSecuredata, who rents dedicated servers. The idea is to
>>> lower costs and eliminate having to deal with hardware.
>>>
>>> The advertise "unmetered bandwidth", but mention QoS measure to control
>>> "bandwidth hogs".
>>>
>>> One of my customers, whose site I just moved from a unique IP virtual host
>>> on my old server onto an Apache NameVirtualHost on the new one, worked
>>> fine at first. Then today, they started complaining about getting one of
>>> our home pages. I figured DNS or web caching issues, until I started
>>> seeing it for myself. It was no caching issue, it was NameVirtualHost
>>> breaking.
>>>
>>> I poured over my configs (I've done this config countless times), and saw
>>> this in the apache docs:
>>>
>>> http://httpd.apache.org/docs/2.2/vhosts/name-based.html
>>>
>>> " Some operating systems and network equipment implement bandwidth
>>> management techniques that cannot differentiate between hosts unless they
>>> are on separate IP addresses."
>>>
>>> So, I installed lynx on the server, and sure enough, it worked perfectly
>>> fine there, just not from anywhere outside eSecuredata's network that I
>>> could see.
>>>
>>> Can anyone shed any light on this particular practice, of this company in
>>> particular?
>>>
>>> thanks
>>>
>>> James Smallacombe PlantageNet, Inc. CEO and Janitor
>>> up at 3.am http://3.am
>>> =========================================================================
>>>
>>
>> James Smallacombe PlantageNet, Inc. CEO and Janitor
>> up at 3.am
>> http://3.am
>> =========================================================================
>>
>>
>
> James Smallacombe PlantageNet, Inc. CEO and Janitor
> up at 3.am http://3.am
> =========================================================================
>
James Smallacombe PlantageNet, Inc. CEO and Janitor
up at 3.am http://3.am
=========================================================================
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