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Old 08-19-2010, 01:42 AM   #1
linuxlover.chaitanya
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Registered: Apr 2008
Location: Gurgaon, India
Distribution: Cent OS 6/7
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Network broadcast detection.


Hello all,

There is a server running CentOS5.5 Final acting as a squid proxy for internet sharing. Internet is provided through an adsl modem router from ISP with static IP and is 750kbps line.
Suddenly there was browsing speed lag and ISP said they tried to ping and there was a big latency. I am not an expert in network administration.
I need some software that can help me figure out which system in the network is broadcasting and mugging the bandwidth.
Tried MRTG and is not much help.
 
Old 08-20-2010, 11:00 AM   #2
suprstar
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You can look at the network traffic and see who's using all the bandwidth. tcpdump is a simple command line utility. wireshark is a more developed gui packet sniffer I use all the time - it can capture all network traffic, then you can analyze it a bunch of different ways. If you can get a capture while this lag is happening, you'll see it plain as day.

That's assuming it's a network flood causing the lag. There's a lot of other things that can slow down a network.... Sniffing the traffic will prove if it is or isn't massive traffic causing your lag.
 
Old 08-23-2010, 12:43 AM   #3
linuxlover.chaitanya
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I thought on tcpdump as well but I want something that would keep running for sometime as a daemon and capture the data and have it analyzed it later. But this could take a lot of resources and that is what I am afraid of.
 
  


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