Sample setup

apt-get install bridge-utils

The basic setup of a bridge is done like:

 # ifconfig eth0 0.0.0.0
 # ifconfig eth1 0.0.0.0
 # brctl addbr mybridge
 # brctl addif mybridge eth0
 # brctl addif mybridge eth1 
 # ifconfig mybridge up

This will set the host up as a pure bridge, it will not have an IP address for itself, so it can not be remotely accessed (or hacked) via TCP/IP.

Optionally you can configure the virtual interface mybridge to take part in your network. It behaves like one interface (like a normal network card). Exactly that way you configure it, replacing the previous command with something like:

 # ifconfig mybridge 192.168.100.5 netmask 255.255.255.0

If you want your bridge to automatically get its IP address from the ADSL modem via DHCP (or a similar configuration), do this:

 # ifconfig eth0 0.0.0.0
 # ifconfig eth1 0.0.0.0
 # brctl addbr mybridge
 # brctl addif mybridge eth0
 # brctl addif mybridge eth1 
 # dhclient mybridge

apt-get install ntop

ntop -u root -w 3000

http://server:3000



===============================================
/etc/network/interface
auto eth0 
iface eth0 inet static 
        address 0.0.0.0 
        netmask 255.255.255.255 

auto eth1 
iface eth1 inet static 
        address 0.0.0.0 
        netmask 255.255.255.255 

auto mybridge 
iface mybridge inet static 
        address 192.168.0.49 
        netmask 255.255.255.0 
        bridge_ports eth0 eth1
========================================================= 
/etc/init.d/ntop
start-stop-daemon --start --quiet --name $NAME --exec $DAEMON -- \ 
  -d -L -u $USER -P $HOMEDIR --skip-version-check \ 
  -a $LOGDIR/access.log -i "$INTERFACES" \ 
  -w 3000 \ 
  -p /etc/ntop/protocol.list \ 
  -t -l -j -O /NTOPDUMP 


========================================================= 
/etc/ntop/protocol.list
FTP=ftp|ftp-data 
PROXY=3128|8080 
HTTP=http|www|https 
DNS=name|domain 
Telnet=telnet|login 
NBios-IP=netbios-ns|netbios-dgm|netbios-ssn 
Mail=pop-2|pop-3|kpop|smtp|imap|imap2 
SNMP=snmp|snmp-trap 
NEWS=nntp 
NFS=mount|pcnfs|bwnfs|nfs|nfsd-status 
SSH=22 
Messenger=1863|5000|5001|5190-5193 
Lotus=1352 
RDP=3389 
SSL=10443 
Shell(syslog)=514 
VMware=902|904 
ms-ds=445 
NTOP=3000 
AV=13000|8530 
VNC=5900|5901|5902|5903|5904|5905|5800 
FSAE=8002