Re: dns-fuzz script is not working with example usage command

[Daniel Miller <bonsaiviking () gmail com>]

On 02/10/2014 02:55 PM, John Bond wrote:
> There was a small bug when dealing with servers that time out.  I have
> added a fix and also enabled tcp support for the dns-nsec-enum and
> dns-client-subnet scripts

John,

Thanks for continuing to work on this. I see the utility of the fix to 
dns.lua and dns-nsec-enum. I'm not sure about the patch to 
dns-client-subnet-scan, though.

The script currently runs as a prerule and as a portrule script, 
requiring the dns-client-subnet-scan.domain argument for the domain name 
to perform a lookup on. For the portrule, your patch works. For the 
prerule case, it will fail because the port argument to the action 
function is nil. There should be a check for this in the script.

Additionally, the script should probably not run as a portrule when 
dns-client-subnet-scan.nameserver script-arg is given, otherwise it will 
continue to perform the same lookup against the same nameserver for 
every port 53 that is discovered.

Dan

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