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I'm using the component lg.cfc ("Coldfusion Ping, Traceroute, Dig, Whois Client") from www.maxnoc.com for DNS lookup. I think I found the component on the tag gallery. It seems reasonably fast but you'll have to test it and/or put a timeout on the CFINVOKE tag.
Here's what I ran to isolate the domain name:
<!--- Call lg.cfc for DNS lookup --->
<!--- parse out line we are interested in (just domain name) --->
<CFSET domain_name=REReplace(variables.fullresults, ".*name = (.*).<br>A.*", "\1")>
This sounds marvellous ... but you gave confused me ... what does maxnoc have to do with it? Which tag gallery - on "our" web site here? maxnoc is the author?
Assuming tag library is now called Exchange I did a global search for lg.cfc and came up blank. I definately do not see a tag lib at maxnoc.
is there a new and better way to do this in CF 8?