Re: [squid-users] squid as reverse proxy for DNS ?

On Mon, 24 Aug 2009 21:52:13 +0200, Jakob Curdes <jc_at_info-systems.de>
wrote:
>> Hi,
>> I am in the market for a reverse proxy that does intelligent load
>> balancing for DNS. I've used Squid for proxy before but have not been
>> able to find any info on using it for DNS reverse proxy (or UDP, more
>> generally) -- I've searched the website and list archives but wasn't
>> able to find anything about this
>>
> Well, because this cannot work. Proxies are essentially protocol parsers
> with a cache. Squid is a HTTP(S) proxy which knows nothing about the DNS
> protocol.
> Moreover, it knows nothing about UDP as transport. There are dedicated
> DNS proxies and general DNS software with proxy capabilities but this is
> out of the scope of this mailing list.
>
> Hope this helps,
> Jakob

Close. Squid contains an internal DNS client that knows all about how to
query and _read_ DNS protocol and does cache it according to DNS standards.
But does not relay any of its info to external programs.

If we are to take a giant leap and assume he meant Squid caching IPs,
identifying dead HTTP servers and routing around them to the working ones.
Squid does do that.

Amos
Received on Mon Aug 24 2009 - 23:02:54 MDT