Rule States/Action - Snort Version 2 versus Snort Version 3
Snort 3 calls this rule Action.
Snort 2 calls this rule State
Snort 2 rule states:
- Generate Events
- Drop and Generate Events
- Disable

Snort 2 custom rules can also be created using the Pass action. To use Pass action, you need to set the state to Generate Events.
Snort 3 rule actions:
- Alert
- Block
- Drop
- Rewrite
- Pass
- Reject
