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Date:      Fri, 14 Jul 2000 22:30:26 +0000
From:      Ben <ben@emailnow.net>
To:        Carl Strickler <cstrickl@ifta.net>
Cc:        "'freebsd-questions@freebsd.org'" <freebsd-questions@freebsd.org>
Subject:   Re: Who's knockin' on my firewall [OFF TOPIC] 
Message-ID:  <200007142230.WAA12588@emailnow.net>
In-Reply-To: Message from Carl Strickler <cstrickl@ifta.net>  of "Fri, 14 Jul 2000 14:12:13 MST." <01BFED9D.8280F100.cstrickl@ifta.net> 

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Carl,
	If I'm curious enough about an IP that doesn't seem to resolve I'll do 
a traceroute to it to see where it's coming from. Then depending on why I 
noticed the IP in the first place I may dig further and find a technical or 
administrative contact to send mail to.


-- 
--
Ben Williams
Systems Administration

> This is a bit off topic, but I was hoping someone could at least point me in the right 
> direction.  
> 
> I regularly check my security logs to see who's been trying to get in and I'll do an 
> nslookup on any IP address that occurs over 3 times.  Now once in a while this 
> will actually be useful and I come up with actual useful information.  But most of 
> the time I end up with what I started with, an IP address.  Is there a way to find out
> who owns what block of addresses?  
> 
> Also is there a way to find out the real IP address if someone is spoofing (quite often
> we are probed by someone with a 10.x.x.x address)? 
> 
> Finally, is there any kind of SOP when dealing with unauthorized attempts from foreign 
> countries (we seem to get probed quite a bit from SE Asia)?  
> 
> Any information would be helpful.
> 
> 
> TIA,
> Carl
> 
> 
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