Network Gear that "helps" with DNS

Ketil Froyn isc_bind at
Fri Mar 4 15:33:22 UTC 2005

On Fri, 2005-03-04 at 07:26 -0800, Al Sparks wrote:
> I've noticed some unpredictable behavior when doing queries from
> inside our network.
> This includes the following:
>   dig
> returns an INTERNAL address.
> When I access a host from outside our internal network and do the same
> thing, I get the expected address.
> This leads me to believe that within the internal network, some piece
> of network gear is intercepting my query and providing an answer it
> thinks should be provided.
> We have mostly cisco gear, including pix firewalls.  Does anyone know
> of network gear that would do that?  If it's a pix, where can one find
> the settings for this?

Sounds like it might be DNS doctoring in your PIX:

Ketil Froyn
ketil at

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