Re: don't interrupt traffic when snort inline crashes

[Jaime Nebrera <jnebrera () gmail com>]

   Hi Guillaume

> We decided to use snort inline as an IPS.
>
> We will deploy snort inline on network and we have one question about what will happen when machine or snort will 
> crash.
>
> - If our machine crashes, we have a fail open card so traffic will be forward. (of course without IPS but we think 
> it's better to not interrupt network traffic)
> - My question is if snort crashes, the bridge between our interface will be broken but the system will be up so fail 
> open card will not work as a bridge and we will lost every packets.
>
> How could we resolve this issue to not interrupt traffic after snort crashes ?

   You need to control the state of the snort process either by an 
external process or by the stats produced by it with a watchdog

   In case you detect something is wrong, you can enable the bypass 
functionality of the card or divert the traffic to go directly through 
the bridge without entering snort.

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