ebtables

http://ebtables.sourceforge.net/

 

 

example source routing using source ips

Occansion in Linux when running a VPN you want to generate traffic from the VPN server node. By default Linux uses the IP of the interface used to route a package. The might often complicated the routing tables required at client networks.

A solution to fix this issue is to use Linux source/policy routing. For example, for node with IP 192.168.10.1 and VPN server IP 172.29.148.1, route to subnet 192.168.9.0/24 out 172.29.148.1 via 172.29.148.2 with src (source) IP 192.168.10.1:

http://wiki.georgweiss.de/Linux/source_routing

 

ip route add 10.60.10.0/24 dev eth0 src 10.60.10.145
ip route add 10.60.10.0/24 dev eth0 src 10.60.10.145 table T1
ip route add default via 10.60.10.254 table T1

ip route add 10.30.82.0/24 dev eth1 src 10.30.82.35
ip route add 10.30.82.0/24 dev eth1 src 10.30.82.35 table T2
ip route add default via 10.30.82.254 table T2

ip route add default via 10.60.10.254

ip rule add from 10.60.10.145 table T1
ip rule add from 10.30.82.35 table T2

ip route add 10.30.82.0/24 dev eth1 table T1
ip route add 10.60.10.0/24 dev eth0 table T2
ip route add 127.0.0.0/8 dev lo table T1

tcp and udp traffic statics

netstat -su
netstat -st
netstat -ua

Bandwidth Monitoring Tools for Ubuntu Users

Bandwidth in computer networking refers to the data rate supported by a
network connection or interface. One most commonly expresses bandwidth
in terms of bits per second (bps). The term comes from the field of
electrical engineering, where bandwidth represents the total distance or
range between the highest and lowest signals on the communication
channel (band).

Bandwidth represents the capacity of the
connection. The greater the capacity, the more likely that greater
performance will follow, though overall performance also depends on
other factors, such as latency.

Bandwidth Limiting HOWTO

Tomasz Chmielewski

tch@metalab.unc.edu

Revision History
Revision 0.9	2001-11-20	Revised by: tc

This document describes how to set up your Linux server
to limit download bandwidth or incoming traffic and how to use
your internet link more efficiently.