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Forums › Mac OS › OS X using bandwidth when it should be idle
sleepeyNZ

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#47382 11-Nov-2009 11:49
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Hey all


A little mystery.. I am using a XT mobile broadband (MF636) on OS X 10.6.1, and Telecom Connection Manager is telling me that I am continuously sending/receiving precious KB's when I have no obvious programs running.


I initially thought mobile me was the culprit as I spotted aosnotify.me.com using lsof, so turned off auto-sync, and it is still happening.
SurplusMeter agrees with TCM.. so what is doing it?


it is sending roughly the rate of 1KB/s and rx at 0.5KB/s.. which doesnt sound like much but I only have so much to play with a month and it adds up!



WAL-Es-iMac:~ waynelaker$ lsof -r -i TCP -i UDP
COMMAND   PID       USER   FD   TYPE     DEVICE SIZE/OFF NODE NAME
SystemUIS 192 waynelaker    7u  IPv4 0x07ecb8ec      0t0  UDP *:*
SystemUIS 192 waynelaker   11u  IPv4 0x07ecb810      0t0  UDP *:*




any ideas?



cheers
Wayne

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wellygary
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  #271993 11-Nov-2009 11:58
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Grab a trial of little snitch and have a look at what it trying to connect to the 'net

http://www.obdev.at/products/littlesnitch/index.html



sleepeyNZ

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  #272000 11-Nov-2009 12:13
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thanks

it's mDNSResponder, responding to dnsc1/2.xtra.co.nz.. why would that be going hard out continuously?

wellygary
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  #272008 11-Nov-2009 12:31
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http://developer.apple.com/networking/bonjour/faq.html


2. What is mDNSResponder?

mDNSResponder is a Bonjour system service that implements Multicast DNS Service Discovery for discovery of services on the local network, and Unicast DNS Service Discovery for discovery of services anywhere in the world. mDNSResponder is built into Mac OS X and can be downloaded as part of Bonjour for Windows. Applications like iTunes, iPhoto, iChat and Safari use mDNSResponder to implement zero-configuration network music sharing, photo sharing, chatting and file sharing, and discovery of remote user interfaces for hardware devices like printers and web cameras. mDNSResponder is also used to discover and print to Bonjour printers and USB printers connected to the AirPort Extreme and Express base stations. mDNSResponder is open source, and hardware device manufacturers are encouraged to embed the mDNSResponder source code directly into their products to benefit from zero-configuration networking.



sleepeyNZ

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  #272013 11-Nov-2009 12:41
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Yes I saw that, but surely it shouldn't be using that much bandwidth.. If I left my connection running it would be using 170 MB/day or roughly 5GB/mo!

and I only have 3 GB/mo data allowance!

Jarno
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  #272078 11-Nov-2009 16:20
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Automatic updates maybe? There was a security update recently, and 10.6.2 came out a few days ago.

wellygary
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  #272082 11-Nov-2009 16:24
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Jarno: Automatic updates maybe? There was a security update recently, and 10.6.2 came out a few days ago.


Nah, OSX waits for the user to initiate a software update,

TO the original OP, why dont you crank up the firewall settings and stop it getting out.

 
 
 
 

Move to New Zealand's best fibre broadband service (affiliate link). Free setup code: R587125ERQ6VE. Note that to use Quic Broadband you must be comfortable with configuring your own router.
josephhinvest
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  #272086 11-Nov-2009 16:30
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OSX waits for the user to initiate a software update.



Not necessarily, Mac OS 10.5 and 10.6 can "Download Updates Automatically" you can enable or disable in System Preferences > Software Update > Scheduled Check.
The downloads occur invisibly in the background, Software Update will then prompt that Updates have been downloaded and are ready to install.


Software Update used my old mans entire 1 GB vodafone cap, in the background. He couldn't understand why he had been using so much data! The 10.5.8 combo update is like 750 MB.


Cheers,
Joseph


 

sleepeyNZ

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  #272088 11-Nov-2009 16:31
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I did that and I could not resolve dns, so it would seem somewhat important

sleepeyNZ

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  #272090 11-Nov-2009 16:33
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Download Updates Automatically is not enabled, plus when I disabled the mDNSresponder the traffic stopped.. although perhaps whatever was causing traffic couldnt resolve dns anymore


I need a drink!

wellygary
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  #272095 11-Nov-2009 16:48
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According to this, mDNSresponder handles the DHCP renewal, perhaps this was set to constantly renew the DHCP lease. - have a look in your internet settings and see if their is anything obvious

http://osxdaily.com/2009/09/15/disable-bonjour-by-turning-off-mdnsresponder/

Ashka
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  #272288 12-Nov-2009 09:31
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I queried the constant bandwidth use with Telecom and was told it was used to keep the USB modem connection going.

Little Snitch & iStat Menus ~ mDNSResponder 1KB per second up most of the time.

Telecom Connection manager is also writing over 4000 messages to Console each hour
There are also the Stealth mode connection attempts every couple of seconds from numbers I have been told are telecoms 202.27.158.40:53 & 202.27.156.72:53


The modem software is also very poor and will not configure the modem in System Prefs network at all although it will work after a fashion.




MacBook Pro ~ OSX 10.7. Lion ~ XT 3G iPad 2 ~ XT 
Vodafone & CDMA mobile phones.


















 
 
 
 

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wellygary
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  #272290 12-Nov-2009 09:36
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Ashka: I queried the constant bandwidth use with Telecom and was told it was used to keep the USB modem connection going.


Did you ask them if it is zero rated, or are you paying for this "service" with your datacap?

Ashka
139 posts

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  #272291 12-Nov-2009 09:38
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No I didn't, should have.
Surplus meter says I'm paying for it and more.
S.




MacBook Pro ~ OSX 10.7. Lion ~ XT 3G iPad 2 ~ XT 
Vodafone & CDMA mobile phones.


















Ashka
139 posts

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  #272321 12-Nov-2009 10:41
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Quick note:
The XT Stick modem software update direct download links in the Telecom forum are for Windows only..




MacBook Pro ~ OSX 10.7. Lion ~ XT 3G iPad 2 ~ XT 
Vodafone & CDMA mobile phones.


















sleepeyNZ

18 posts

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  #272323 12-Nov-2009 10:43
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Thanks for the help guys

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