- Firewall : filter incoming & outgiing traffic by using Security Policy to allow or deny traffic
- Firewall Policy Process:
1. Check which Incoming & Outgoing Interface to filter
2. Check which Source & Destination IP address to filter
3. Check what Service to filter
4. Check When the policy to run
5. Check Action to allow or deny
Note : - Incoming Interface : is the interface that receive packet from ( ពីក្រៅមកក្នុង )
- Outgoing Interface : is the interface that forward packet to ( ពីក្នុងទៅក្រៅ )
Default Policy
- Allow all network /Service + NAT
- Deny all Network /Service
- It search policy list from top to down for matching policy -> First match will apply first
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