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Thread: Re: network tools




Re: network tools
user name
2005-09-03 14:45:13
Chris wrote:
> Why don't the numbers support the experience? We have
1Mb/s download and 
> 128K upload (telewest cable). In theory even between us
we weren't using 
> all the bandwidth.
> 
> If I put a FreeBSD NAT/router box between the cable
modem and the LAN 
> what console based tools should I put on it to examine
what's happening?

You want:

snort for packet sniffing and analysis
nmap for scanning your network to see if someone is running
wierd apps.

You may want to configure your firewall with pf and queuing
so limewire 
etc doesn't eat it all up. With pf, you can also monitor the
state 
table, and you can also log suspicious traffic or traffic
that causes 
problems. You need to use tcpdump to read the logfile.

IIRC, ethereal is a server/client program where the server
runs on the 
trusted host where you want to monitor the traffic. It is
good for 
getting the big picture of what is going on. Also, take a
look at 
nagios. I have to say that I haven't used ethereal or nagios
at all.

Cheers, Erik
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