[Snort-sigs] multiple interfaces

Javier Fernandez-Sanguino jfernandez at ...2106...
Fri May 21 02:47:52 EDT 2004

Matthew Watchinski wrote:

> bonding works just fine for smashing multiple interfaces together.  But 
> use with caution depending exactly what you want to do.  If you want to 

Oh good. I just took a wild shot :-)

> monitor multiple interfaces with different policies ie different 
> snort.confs or variables it's bested to use multiple instances of 
> snort.  

Absolutely (even if it's worst on system resources)

> If you just want to smash everything together then bonding is 
> the way to go.  You can also uses taps or spans/mirror ports to 
> accomplish the same goals.

Not _exactly_ the same, since you won't be able to retaliate (inject 
again traffic to, for example, send RST to connections) if you are 
using a tap or a spam/mirror. They are, after all, a "one way" 
connection. As an advantage, the IDS would not be as exposed if using 
tags vs bonding (since even if it's compromised it cannot reinject 
data to the network).



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