Network Monitoring

Introduction

tcpdump ' tcp[13] & 7 != 0 and dst 192.168.255.20 ' > /tmp/out7

http://www.opennms.org/
http://netsaint.sourceforge.net
BTW: you try loriot from http://www.llecointe.com/ , it is free
but work in windows .
FreeBSD + dummynet
Linux 2.4
Linux + NistNet http://snad.ncsl.nist.gov/itg/nistnet/
Linux 2.2 CBQ : It's new in 2.2 and does all that shaper does and much more. The only problem with CBQ is documentation, or rather, the lack thereof. But it isn't that hard... Linux's CBQ can do more then routers and more then a lot of traffic shapping devices. It will handle the kinds of loads you are talking about with ease (I use 21264 systems to do fair queue and priorit on multiple 100Mb's streams)..
Linux Router Project http://www.xtdnet.nl/linux-router/
Packeteer http://reseaux-telecom.net/iop99/npqo003.htm Prix: environ 45 000 F TTC pour PacketShaper 1000; Environ 91 000 F TTC pour PacketShaper 2000; Environ 181 000 F TTC pour PacketShaper 4000.
Allot Communication
Linux/FreeBSD + ET/BWMGR - Bandwidth Manager
http://www.etinc.com
ALTQ: Alternate Queueing for BSD UNIX
http://slashdot.org/askslashdot/99/07/06/1433234.shtml
Bandwidth Management: Whose Job Is It?
http://www.bcr.com/access/2000/03/p20.asp