net / bandwidth / analysis

nadir

Ok baiscally this is such a grey area, and I get the feeling I may be tasked at work to develop some type of net analysis system. Baiscally what I want to learn is how to monitor bandwith usage over time, im sure you guys know the type of software in talking about, command line scripts or such that will show bandwidth usage/ whose using it, what ip's are requesting the most etc. Ive googled and looked at some forums, apart from vague hints at iptables logging I'm at a loss, I cant find much conclusive info, flamegrill , I'm guessing this is your area of expertise, if I could get some pointers , online guides or such. that would be awesome. ty.

shakenbake

Have you checked out the Freshmeat site?

There are hoards of applications there that will do exactly what your looking for.
I'd recommend checking out Ntop first, its excellent.

Chad ghostal

used ntop in the place i used to work,
Im sure it did what your looking for; very handy.

nadir

ok, cool thks guys, thats exactly what im looking for, can't believe I never saw taht one before, although it does sound familiar. I must be losing it. :rolleyes:

im checking out nagios and zabbix now too

flamegrill

You can use cacti go get an overall view of snmp enabled switchs, traffic going over each port etc.

Ntop is a very usefull tool for monitoring all sorts of traffic and handy for pulling reports on people who use the most bandwidth etc.

Paul

nadir

nice flame, Ill have a look at cacti tomorrow, I had a good read up on ntop earlier today at work, looks like it will do the job. Has a built in web interface too which should come in handy.

vinks

nagios is pretty nifty, but it doesnt monitor bandwidth/network stuff too much, we use it in work to monitor the status of services / machines on the network, and when something breaks it emails us. you can write plugins for nagios to monitor the network, but it wont really display stuff too well graphically, try ganglia for that type of stuff before going to nagios.