On Sat, 17 Jul 2010 00:07:00 +1000 Basil Chupin <blchu...@iinet.net.au> wrote:
> If a router doesn't respond to an ICMP ping then it does not exist. > Right? Or is this wrong? From the headers of your mail: > Received: from unknown (HELO [192.168.1.3]) ([124.171.111.123]) > by outbound.icp-qv1-irony-out6.iinet.net.au with > ESMTP/TLS/DHE-RSA-AES256-SHA; 16 Jul 2010 22:06:55 +0800 So, your IP does indeed exist, regardless of pings, and indeed if someone read the headers they would also know the LAN address of your machine (192.168.1.3). If I wanted to know more I could point nmap at your IP and scan to see if anything was listening. (I won't, and neither I hope will other list members). The fact that you can or cannot be "pinged" is completely irrelevant. Also, it's worth remarking that disallowing icmp is actually against the "RFC" rules (Requests For Comments). So, good Netizens don't block pings ;) grc.com deals in scare-mongering. The "Shields Up" facility is useful, but the insistence on so-called "stealth" is nonsense. Peter
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