From owner-freebsd-questions Fri Jul 14 15:25: 6 2000 Delivered-To: freebsd-questions@freebsd.org Received: from emailnow.net (palmftp.net [209.95.72.170]) by hub.freebsd.org (Postfix) with ESMTP id D39AF37BF2E for ; Fri, 14 Jul 2000 15:25:01 -0700 (PDT) (envelope-from ben@emailnow.net) Received: from emailnow.net (ben@localhost.emailnow.net [127.0.0.1]) by emailnow.net (8.9.3/8.9.3) with ESMTP id WAA12588; Fri, 14 Jul 2000 22:30:26 GMT (envelope-from ben@emailnow.net) Message-Id: <200007142230.WAA12588@emailnow.net> X-Mailer: exmh version 2.1.1 10/15/1999 To: Carl Strickler Cc: "'freebsd-questions@freebsd.org'" Subject: Re: Who's knockin' on my firewall [OFF TOPIC] In-Reply-To: Message from Carl Strickler of "Fri, 14 Jul 2000 14:12:13 MST." <01BFED9D.8280F100.cstrickl@ifta.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Fri, 14 Jul 2000 22:30:26 +0000 From: Ben Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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 > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message