Re: help with BIND SRV

[Nate Duehr]

Fraser Campbell wrote:
On Thursday 07 October 2004 22:23, Nate Duehr wrote:
 

- They don't understand that there might be multiple DNS servers between
their top-level and the machine they're servicing (3X and 4X TTL)
   

Let's say that I have my local (desktop if you prefer) resolver (which I'll 
call A is pointed to a caching nameserver B.

Caching nameserver B forwards all of it's DNS requests to their ISP's larger 
caching server C.

Caching server C makes queries to the appropriate authoritative server D.
So the DNS query goes:
 A->B->C->D
D replies to C with a record having TTL of 3600.  C forwards request to B, B 
gives answer to A ... TTL 3600.

 

You're talking about forwarding... like using the "forwarders" statement 
in Bind. 

I was talking about sites that have "done it wrong" (my opinion, and 
probably yours too - it's just not right...) so to speak, and are 
forcing port 53 traffic to different places than it was intended to go 
originally.

"Proxying" would be the best phrase I could call it.  Some commercial 
active firewall implementations do something similar.

Nate
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