Posted by Michael on 11/16/83 11:33

"Malcolm Dew-Jones" <yf110@vtn1.victoria.tc.ca> wrote in message
news:438fb659$1@news.victoria.tc.ca...
> Michael (INERFAZE@aol.com) wrote:
> : "Malcolm Dew-Jones" <yf110@vtn1.victoria.tc.ca> wrote in message
> : news:438f5738$1@news.victoria.tc.ca...
> : > Michael (INERFAZE@aol.com) wrote:
> : >
> : > : I just tried a fixed IP of Microsoft
> : > $domain=GetHostByAddr("207.46.20.30");
> : > : and that didn't work either.
> : >
> : > But it did work! It just didn't do what you wanted it to do. It
> returned
> : > the information that was made visible to the host that ran the
> command -
> : > in other words, no information.
> : >
> : > That is exactly why someone originally said this was "fraught" with
> : > problems.
> : >
> : > You can only get the reverse lookup if an appropriate name server
> makes
> : > that information available to you, and they commonly don't do that.
> Even
> : > if the information is available to _some_ people on one network, _you_
> : > will not be able to get it unless that name server is visible to you.
> : > For example I have my own resolver setup at home, and I can assign
> names
> : > to my machines, but my name server setup is not visible to you and so
> you
> : > cannot get that information. Lots of machines have names that are
> only
> : > visible to some internal network, even if the ip address of that
> machine
> : > can access the world.
> : >
>
> : I am not real savvy with all that, but are you telling me that I could
> see
> : the IP address of one of your (own resolver handled) machines but not
> the
> : dns name?
>
> Yes.
>
What is the IP address, I will give it a try.

[Back to original message]