Want to have cache server for small ISP

Per Buer perbu at varnish-software.com
Wed Mar 19 21:55:51 CET 2014

To supplement Bjørns answer a bit.

Forward caching was never the intended use for Varnish so Varnish as a
forward proxy is completely untested. Without knowing too much about the
Squid codebase I expect quite a bit of it are workarounds for various
bugs/quirks that IE6, Flash 9 and other weird clients have. In additions
I'm certain there are optimisations for use cases we simply don't care

A simple thing such as cookies, which are more or less omnipresent, will
completely disable Varnish, which is probably not something you want in a
forward proxy.

On paper, with a non-caching proxy to serve as a backend, it might work.
But then again, there are pieces of software out there that are built
specifically for this that will certainly provide a better solution. I
think Squid is still seeing active development and it has a lot of relevant
features (support for anti-malware plugins, native SSL support...). I think
ATS is also meant to work as a forward proxy, but I'm not 100% sure.


On Wed, Mar 19, 2014 at 6:50 PM, Stephen Wood <smwood4 at gmail.com> wrote:

> Can we clarify exactly why? My understanding is that varnish is a web
> accelerator for a *website*, and in practice it will only cache for a
> single domain. It can't be setup to cache for all domains.
> I can imagine you can get around this by using a varnish + squid pair, but
> the performance would be unacceptable for an ISP. Not to mention that fact
> that making varnish highly available and distributed is a lot of work on
> its own.
> Can anyone on this list recommend a better solution to the original
> question?
> On Wed, Mar 19, 2014 at 1:42 AM, Per Buer <perbu at varnish-software.com>wrote:
>> On Wed, Mar 19, 2014 at 7:41 AM, Darshak Modi <darshak.modi at elitecore.com
>> > wrote:
>>> Hello,
>>> I want to deploy a cache server for small ISP.
>>> From documents , I understand Varnish can be used for reverse-proxy only.
>>> I have to cache all world HTTP traffic, video traffic, updates for end
>>> client who are using ISP internet.
>>> Cache server to be deployed at ISP router end.  I gone through Squid and
>>> I think it can work.
>>> But I can not understand if Varnish can be used for the same purpose.?
>> No.
>> Varnish isn't built for this.
>> --
>>  <http://www.varnish-software.com/> *Per Buer*
>> CTO | Varnish Software
>> Phone: +47 958 39 117 | Skype: per.buer
>> We Make Websites Fly!
>> Winner of the Red Herring Top 100 Global Award 2013
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> --
> Stephen Wood
> www.heystephenwood.com

 <http://www.varnish-software.com/> *Per Buer*
CTO | Varnish Software
Phone: +47 958 39 117 | Skype: per.buer
We Make Websites Fly!

Winner of the Red Herring Top 100 Global Award 2013
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