Re: Rules in Snort 2 but not present in Snort 3

Those are probably bad examples Jason, as they are preprocessor alerts.

— 
Sent from my  iPad

> On May 24, 2022, at 19:38, Jason Hutchinson (jashutch) via Snort-sigs <[email protected]> wrote:
> 
> 
> Hello all,
> I am looking into reports that indicate “NON-CUSTOM” Snort rules that are present in Snort v2, but are not seen in Snort v3. 
>  
> It is understood that there are changes to include, but not limited to;
>  
> Simplified Rule Headers
> http* sticky buffers
> PCRE flag removal
> Matching sub-options
> Urilen rule drop
> Just to name a few …..
>  
> Additionally, there are features not supported in Snort 3 that were in Snort 2.
>  
> Safesearch
> YouTube EDU
> No TID incident or SI event on blocked event
> No TID incident for monitoring
> Along with others …
>  
>  
> So,  my specific question is, taking the example two rules below, they can be seen in Snort v2   but not SNORT v3:
> "HI_EO_SERVER_INVALID_CHUNK_SIZE"; sid:28; gid:120
> "STREAM5_DATA_ON_SYN"; sid:2; gid:129
>  
>  
> Is there some sort of reference that may indicate the reason a rule is no longer listed like the ones stated above?  Something that may indicate a rule is not seen because….
>  
> Changes that reduced the need to have multiple rules where one rule would apply to multiple scenarios
> Rule is no longer included due to features not supported on Snort v3
>  
>  
> I apologize if this has been covered somewhere.  The above information was included to show there was some effort to look for some sort of resource that would provide the answers…
>  
> Thanks everyone.
>  
> Jason M. Hutchinson
>  
>  
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