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February 19, 2006, by Léon Krijnen

How to make a Mac invisible?   

invisible.jpgMy logs show that since I'm a happy Mac owner, the percentage of visitors using a Mac has risen. The average of Mac users in unique sessions is approximately 50 a day now. Must have something to do with search engines. Anyway; this might be the right place to ask the question: how do I make my Mac invisible?
On my previous old XP and Win 2K platforms, my machines passed the Shields Up test at Gibson Research with flying colors: totally stealth, totally invisible. The Norton Suite did the job wel, Firewall and anti-virus.
While I'm using Little Snitch and Virex I feel pretty safe, and all logs so far haven't showed anything that should worry me.

Having said that; I want to be invisible again. A quick search on the internet showed that I should check: Sharing/Firewall/Advanced/Stealth Mode.

Having done so, inviting Gibson again to touch me, see me, feel me, (and heal me!) the results were the same:

File sharing and common ports no problem, all closed. So far so good, but now in probing all service ports the machine fails:

Solicited TCP Packets: RECEIVED (FAILED) — As detailed in the port report below, one or more of your system's ports actively responded to our deliberate attempts to establish a connection.

Ping Reply: RECEIVED (FAILED) — Your system REPLIED to our Ping (ICMP Echo) requests, making it visible on the Internet.

Now I know there's an awful lot of information on the Gibson site, but some of the stuff is right above my head, and apart form that, I havent't got the time to seek it all out.

I kow too that my problems will probably be fixed by installing Norton Internet Security for the Mac, but there must be a quick fix.

Probably a simple terminal command wich results in denying a ping request, and another one doing the same for that port response.


> > > > > >

Going back to Gibson after Garrett's post:

Report created on UTC: 2006-02-20 at 06:33:30

Results from scan of ports: 0-1055
0 Ports Open
0 Ports Closed
1056 Ports Stealth
1056 Ports Tested
ALL PORTS tested were found to be: STEALTH.
TruStealth: PASSED - ALL tested ports were STEALTH,
- NO unsolicited packets were received,
- NO Ping reply (ICMP Echo) was received.

Thanks, Garret, and Little Snitch

Posted: February 19, 2006 11:48 AM (380 words).   

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