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10.4: How to disable Bonjour
Authored by: snoop on Jul 18, '05 09:16:17PM

Bonjour does NOT give out user names, and it gives out the Computer Name so that you can recognize your computer in a list. The Computer Name is fully customizable and doesn't need to contain your real name. If an attacker really wants to enumerate the running services, they can do this even if the dumb "stealth mode" feature is on. Your machine will always send an "ack" for a TCP request to a certain port, because if it doesn't, then networking wouldn't work at all. So leaving Bonjour on does not make it easier for an attacker. Lastly, Bonjour is not chatty when compared to all the other networking activity on the computer. If you actually looked at a packet trace, you would realize that.

I would not recommend turning off Bonjour. You will not be saving much in CPU usage since mDNSResponder averages less than .01% CPU. Also, many things that you might not realize (like printing and AirTunes, etc.) rely on Bonjour and will break if you turn it off.



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10.4: How to disable Bonjour
Authored by: jonasyorg on Dec 06, '05 10:00:43PM

you can find a person's user name depending on how they have their computer name set or what applications they might be running (webserver for instance)

Jonas



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