Nmap Development: Re: [NSE] ASN made more robust and documented - much more to do.

[jah <jah () zadkiel plus com>]

On 30/08/2008 06:43, David Fifield wrote:
> On Sat, Aug 30, 2008 at 06:35:01AM +0100, jah wrote:
>   
> > On 30/08/2008 02:02, David Fifield wrote:
> >     
> > > I can verify through --script-trace that a response from the DNS server
> > > comes back. Is there anything I can do to help debug? I want to make
> > > this script use dns.get_servers instead of requiring a script arg.
> > >       
> > I've been working on an update to ASN which uses the dns library
> > (including get_servers) which I've attached.  I haven't looked at why
> > that version you tried has failed.
> >     
> No worries, this version works. If I don't give the dns script arg it
> times out after about 20 seconds.
>
> David Fifield
Hi David,

I can't reproduce this at all.
I think that the time out may be two connection attempts to a single dns
server (for each of two TXT queries) via dns.send_packets().
If this is the case then it would point to some issue either with
dns.query() which assumes udp:53 or with nmap.get_dns_servers() possibly
returning duff (but legal) dns servers.
Does any of that sound plausible?  Do you get a line: "mass_rdns: Using
DNS server <host>" with debigging?

Regards,

jah

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