Re: How do I perform a reverse DNS lookup?

[Gary Guthrie <GaryGuthrie@xxxxxxxx>]

Hi Paul,

The April 1999 issue of NEWS/400 magazine published my article, "Who's
Visiting Your Web Server?". This article contains a utility that
performs the function you desire.

You can download the code from the NEWS/400 web site.

HTH,

Gary Guthrie
NEWS/400 Technical Editor
REAL Solutions Technical Support



> Paul Jackson wrote:
> 
> Hi there folks,
> 
> is it possible to do a reverse DNS lookup from any of the exit
> programs that receives a dotted decimal IP address?
> 
> We would like to store authorized FTP sites by domain name rather than
> by IP address, as that is what our users will be implementing in their
> FTP client programs. Obviously the AS/400 is able to lookup the IP
> address from the remote DNS (we do not use local DNS), and pass it to
> the exit program.
> Is it possible to take the IP address and look the other way?
> I presume this will take some sockets api calling (gulp!) from RPG IV,
> if so can anyone give me some examples?
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