STOP
mDNSResponder
from running on your Mac!

Important update for:
Snow LEOpard (10.6.X)
and
iPhone/iTouch (3.x.x)
users

If you TURN OFF MDNS, as seen at the bottom of this page, your DNS will stop working !!!!!
Do not panic, you can still ssh into the device.

ONLY FOR OS-X 10.6.x and 3.x iPhone/iTouch and above do:

To fix, see Apples NOTICE or do:
sudo nano /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

If it is in BINARY file that you can not read, do:
sudo plutil -convert xml1 /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist BEFORE: <key>ProgramArguments</key> <array> <string>/usr/sbin/mDNSResponder</string> <string>-launchd</string> </array> AFTER: <key>ProgramArguments</key> <array> <string>/usr/sbin/mDNSResponder</string> <string>-launchd</string> <string>-NoMulticastAdvertisements</string> </array>

BEFORE: Hello AFTER: Hello

Click HERE to get mDNS Watch by FEASS for your iPhone/iTouch for FREE .
Click HERE to get BonjourBrowser (1.5.6) for your Mac.

Only for OS-X 10.5.x and lower and iPhone/iTouch 2.x.x and lower, do:

TURN OFF:
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

TURN ON:
sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

NOTES:
  1. Both the above WILL survive a re-boot.

  2. This trick will NOT work on your jailbroken iPod Touch or iPhone if you are running 3.X.X of the OS
    - You still can ssh to your device, but all other DNS functions will be down....
    - If you use the Snow LEOpard trick above on your iPhone/iTouch,
    Apps like "Mover" will not see others devices.

Drive your network admin NUTS, do:

- Make belive you are running a web server (on port 80), do:
/usr/bin/dns-sd -R "MyWebServer" _http._tcp . 80 path=/path-to-funny-web-page.html

- Make belive you have a printer (LPR service on port 515), do:
/usr/bin/dns-sd -R "MyPrinter" _printer._tcp. . 515 pdl=application/postscript
(LPD = 515, IPP (cUps) = 631, JetDirect (socket) = 9100)

You get the idea, right !
8-)

To see what items are "on sale":

/usr/bin/dns-sd -B _http._tcp
or
/usr/bin/dns-sd -B _x-mover3._tcp
or
/usr/bin/mdns -B _x-mover3._tcp
or
/usr/bin/mdns -B _smb._tcp
  • You DO NOT WANT OTHERS to see YOUR stuff,
    /usr/bin/dns-sd -B _ssh._tcp

    Browsing for _ssh._tcp
    DNSService call failed -65563     Above is an example of what you SHOULD see on your system, if mDNS broadcasting is DISabled.

    Still not sure if it is off ? Do:
    /usr/bin/sudo /usr/sbin/tcpdump -i en1 -n port 5353

    en0 = Hardline Ethernet
    en1 = Wireless Ethernet
  • www.dns-sd.org and www.multicastdns.org and zeroconf.org and avahi.org
    back

    © Gary Sullivan Maintainer of this page.
    The URL of this page is:
    http://www.hackerskitchen.com/mac-old/mDNS.html
    Constructive Comments, Suggestions and Requests are welcome.

    Hello

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