> How would I go about to set for example a timeout setting for how long
> the script should wait for a response, and is it possible to do more
> than one DNS query at the time? Any suggestions and/or ideas would be
> very much appriciated.
A couple thoughts:
1- are there other nameservers that you can query instead of the slow one?
You might consider even using a non-authoritative server if it is faster. Of
course, it may still have to query the slow server so this might actually
make it slower still. However, if the non-auth server has the info cached
then it may be faster in the long run.
2- Are many of the requests coming from the same domain? If so, you could do
a complete lookup of that domain and cache that info instead of looking them
up one at a time. That can be done two ways:
A- with an 'ls -d' nslookup function (this is often blocked by the
server, though), or
B- 'set type=any' and then 'domain.com' - you'll need to parse out
the A records.
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