[plug] Network analysis info required

[Derek Fountain]

I need some help in figuring out what a certain application is doing to my 
network. I figured there's plenty of people on this list with that sort of 
knowledge. :o)

My firewall is a SuSE Linux box connected to an ADSL modem. NATed behind it 
are a couple of Linux boxen and a Windows box. The Windows box runs a file 
sharing program call eMule. eMule is causing major problems with the internet 
connection - when it's running my other downloads from the Windows box and 
the Linux boxen slow to a crawl. Stop eMule and the problem vanishes 
immediately.

"eMule is swamping the downlink" you say. Well, yeah, only it isn't. Over a 10 
minute period, ifconfig on the firewall external interface shows that only 
about 4MB were actually downloaded from the 'net. eMule's stats page agrees 
with that. Yet during that period all other downloads came in like they were 
on a slow dialup link.

Something else, something more subtle, is going on. If anyone knows what it 
might be I'd be pleased to hear about it. But, more importantly, what tools 
and procedures would people recommend for tracking down a problem like this? 
URLs on what to read would be as welcome as specific suggestions.

-- 
> eatapple
core dump