156-215.80 · Question #297
Which NAT rules are prioritized first?
The correct answer is B. Manual/Pre-Automatic NAT. In Check Point NAT, Manual/Pre-Automatic NAT rules are evaluated first before any Automatic NAT rules are applied.
Question
Which NAT rules are prioritized first?
Options
- APost-Automatic/Manual NAT rules
- BManual/Pre-Automatic NAT
- CAutomatic Hide NAT
- DAutomatic Static NAT
How the community answered
(36 responses)- A3% (1)
- B94% (34)
- C3% (1)
Why each option
In Check Point NAT, Manual/Pre-Automatic NAT rules are evaluated first before any Automatic NAT rules are applied.
Post-Automatic/Manual NAT rules have the lowest priority in the NAT processing order and are evaluated last, not first.
Check Point processes NAT rules in a strict priority order: Manual (Pre-Automatic) NAT rules are evaluated first, followed by Automatic Static NAT, then Automatic Hide NAT, and finally Post-Automatic Manual NAT rules. This ordering ensures that administrator-defined manual rules take precedence over system-generated automatic rules, giving administrators explicit control over NAT behavior for specific traffic flows.
Automatic Hide NAT rules are processed third in priority, after both Manual/Pre-Automatic NAT and Automatic Static NAT rules.
Automatic Static NAT rules are processed second in priority, after Manual/Pre-Automatic NAT rules but before Automatic Hide NAT.
Concept tested: Check Point NAT rule processing priority order
Source: https://sc1.checkpoint.com/documents/R81/WebAdminGuides/EN/CP_R81_Firewall_AdminGuide/Topics-FWG/Network-Address-Translation-NAT.htm
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