Forum OpenACS Q&A: determining IP blocks for domain?

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1: determining IP blocks for domain?
Posted by Jonathan Ellis on 09/09/02 08:16 PM
I have some undesirables who I'm trying to block from my site.  I was
sucessful at first blocking IP ranges but they've moved to accessing
via proxy servers.  Is there any way I can find out what IPs belong
to, say, marketscore.com so I don't have to rely on trial and error?
I'd imagine this is something dig could do, but I'm too much of a dns
newbie to understand the man page. :0
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2: Response to determining IP blocks for domain? (response to 1)
Posted by Dave Bauer on 09/09/02 08:22 PM
Try http://www.arin.net the American Registry for Internet Numbers. Just type in an IP address in their WHOIS search box.
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3: Response to determining IP blocks for domain? (response to 1)
Posted by russ m on 09/10/02 03:39 AM
Some proxies (including squid) include by default an
"X-Forwarded-For:" header containing the IP address of the client
machine using the proxy. If your "undesirables" are using a proxy
with this behaviour just use that address in your access controls.
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4: Response to determining IP blocks for domain? (response to 1)
Posted by Jonathan Ellis on 09/10/02 06:11 PM
good info.  thanks.