Re: [squid-users] Does any cache in a proxy chain but the last one need to resolve URLs?

On 28/04/11 21:25, Jannis Kafkoulas wrote:
> Hi,
>
> We have a proxy chain of 3 squids (v2.7, RHEL5).
> In my opinion only the last one needs really to resolve the URLs name in order
> to
>
> send the request directly to the web servers ip address in the Internet.
>

Sort of, only the proxy going DIRECT *has* to resolve an IP.

For chains which end with the last peer being the origin web service IP
there is no DNS resolution at all.

> Would it also work if the first two proxies wouldn't resolve?
> And how can that be prevented?

* Configure cache_peer using IP address of the peer
* check that no ACL tests requires resolution
* check that extra component like loggign and adaptation doe not require
DNS. (avoid logging rDNS of the client or IP of the website for example)

That is all.

Amos

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