Bases for writting snort rules

[Guy Martial Nkenne Tchassi <nkennetguy () gmail com>]

Hi everyone,

I am wondering, what are the bases on wich the rules we download from
snort's website are written. Specifically, i want to know if there is a
sort of list describing the content of suspicious paquets in the network or
a sort of database of detected intrusions wich is updated regulary.
To be clearer, i will take the example of antiviruses. Most of them(if not
all) have a viral database on wich they relay in order to determine threats
on the systems on wich  they are installed. Then for each treat, there is a
sort of predefined set of actions that can be undertaken to eliminate the
threats.
I dont know if i've been understood. Please help me with these worries i
have.

Thanks.

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