How can I fake a part of domain?

Warren Kumari warren at kumari.net
Wed Jun 23 22:38:35 UTC 2010


On Jun 23, 2010, at 11:06 PM, Peter Macko wrote:

> How can I "fake" a part of domain?
>
> Explanation of what I mean:
>
> - There is example.com domain somewhere on internet (not under my  
> control) that contains:
> 	www.example.com .... IP: 1.2.3.4
> 	www2.example.com ...	IP: 11.22.33.44
>
> - I have local DNS; and for my local network I fake to have  
> example.com domain.
>
> - I would like to configure my local DNS (BIND) to:
> 	1. return real IP (1.2.3.4) of www.example.com
> 	2. return fake IP (11.11.11.11) of www2.example.com
> 	3. return IP (99.99.99.99) of www3.example.com that do not really  
> exists
>
> No 1. have to forward the request to the real example.com DNS,
> but No 2. and 3. should fake the result.

Erm, are you *sure* that you want to do this?

Really really sure?
It's probably a bad idea, but....


Step 1: Make yourself authoritative for www2, www3 -- in named.conf:
zone "www2.example.com" {
        type master;
        file "/etc/namedb/www2.example.com";
};

zone "www3.example.com" {
        type master;
        file "/etc/namedb/www3.example.com";
};


Step 2: Make zone files www2.example.com (and obviously, www3):
$TTL 1h
www2.example.com. IN SOA localhost  (
					hostmaster.localhost
					2010062700
					1h
					15m
					4w
					1h )

	NS	localhost.
	A	11.11.11.11

Step 3: Repeat "This was a bad idea and I feel dirty..."

W


>
> Thank you.
>
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