[tor-dev] Tor and DNS

[Ondrej Mikle]

On 02/09/2012 12:24 AM, Jacob Appelbaum wrote:
> On 02/08/2012 11:47 PM, Ondrej Mikle wrote:
>> On 02/08/2012 02:59 AM, Nick Mathewson wrote:
>>> On Tue, Feb 7, 2012 at 7:33 PM, Ondrej Mikle <ondrej.mikle at gmail.com> wrote:
>>>
>>> I think if we want an extra field in the future, we want to put it
>>> after the end of the response (that is, after total_len), rather than
>>> having it be optionally in every cell.
>>
>> OK.
>>
>>>> That also means AXFR/IXFR would be off limits (I'm OK with that).
>>>
>>> Me too.
>>
>> Without AXFR/IXFR we could limit total_len to 2 octets.
> 
> I'd really like to be able to AXFR. I think it's important to have Tor's
> DNSPort able to do some of the most basic and common DNS stuff.

What about making a specialized tool for AXFR/IXFR (like tor-resolve)? Its
interface could be listening for DNS packets and returning DNS-stream with
AXFR/IXFR data. Since practically every DNS server open to AXFR/IXRF must listen
on TCP, this can be much easier implemented using the already existing TCP
tunneling in Tor.

I think this solution would make the rest of design simpler.

Ondrej