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chaosminion

Member

Registered: 2011-03-27

Posts: 6

Unexplained network usage

The last few days I have been experiencing strange issues with my networking.  I shutdown all of my apps that I think could use the network, and I still see some usage.  As much as 60Kbps!?  My downloads, including pacman and youtube, stop randomly and I have to start over.  This happens in other web browsers as well.    I recently installed Dropbox and started noticing this about the next day.  Sometimes webpages fail to load for several minutes at a time.  How can I find out what is sending and receiving data?  Or, what the issue could be?

bangkok_manouel

Member

From: indicates a starting point

Registered: 2005-02-07

Posts: 1,556

Re: Unexplained network usage

something like wireshark should help

/edit: fight the drunkness

Last edited by bangkok_manouel (2011-03-27 14:56:14)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,804

Re: Unexplained network usage

Look at netstat

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Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
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How to Ask Questions the Smart Way

chaosminion

Member

Registered: 2011-03-27

Posts: 6

Re: Unexplained network usage

Thank for reminding me about wireshark and netstat!  I'm seeing a lot of 192.168.0.1 to 192.168.0.2 destination unreachable in wireshark.

netstat shows:

Active Internet connections (w/o servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        1      0 192.168.0.2:55106       128.242.186.25:www-http CLOSE_WAIT  
tcp        0      0 192.168.0.2:51128       iw-in-f18.1e100.n:https ESTABLISHED 
tcp        0      0 192.168.0.2:36504       www-13-02.snc4.fa:https ESTABLISHED 
tcp        0      0 192.168.0.2:42832       iw-in-f101.1e1:www-http ESTABLISHED 
tcp        0      0 192.168.0.2:43397       iw-in-f83.1e100.n:https ESTABLISHED 
tcp        0      0 192.168.0.2:55820       yx-in-f102.1e1:www-http ESTABLISHED 
tcp        0    363 192.168.0.2:58435       p3nlh056.shr.p:www-http ESTABLISHED 
tcp        0      0 192.168.0.2:44696       channel-196-202.0:https ESTABLISHED 
udp        0      0 192.168.0.2:58956       bindcat.fhsu.edu:ntp    ESTABLISHED 
udp        0      0 192.168.0.2:45664       ntp2.Rescomp.Berkel:ntp ESTABLISHED 
udp        0      0 192.168.0.2:45923       173-203-122-111.vds:ntp ESTABLISHED

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,804

Re: Unexplained network usage

Try netstat -p
It will identify the process number and program name that own  the nodes

If you want a lot of data, try adding -v

---

Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way

chaosminion

Member

Registered: 2011-03-27

Posts: 6

Re: Unexplained network usage

Thanks for the help.  Everything seems to be working fine again.  Perhaps this was an ISP issue.  Thanks for the useful information!