156-215.80 · Question #468
What is the purpose of a Clean-up Rule?
The correct answer is C. To drop any traffic that is not explicitly allowed. A Clean-up Rule is placed at the bottom of a security policy to explicitly drop and log all traffic that was not matched and permitted by any preceding rule.
Question
What is the purpose of a Clean-up Rule?
Options
- AClean-up Rules do not server any purpose
- BProvide a metric for determining unnecessary rules.
- CTo drop any traffic that is not explicitly allowed
- DUsed to better optimize a policy
How the community answered
(27 responses)- B7% (2)
- C89% (24)
- D4% (1)
Why each option
A Clean-up Rule is placed at the bottom of a security policy to explicitly drop and log all traffic that was not matched and permitted by any preceding rule.
The Clean-up Rule serves the critical purpose of explicitly dropping and logging all unmatched traffic - it is not without purpose.
Identifying unnecessary rules is accomplished through rule usage analysis or hit count features, not through the Clean-up Rule.
Check Point firewalls apply an implicit drop to all unmatched traffic, but a Clean-up Rule makes this behavior explicit and visible within the policy rulebase. Crucially, the explicit rule also enables logging of dropped connections, giving administrators full visibility into traffic that the implicit deny would silently discard - making it essential for both security posture and audit purposes.
The Clean-up Rule does not optimize policy performance or rule ordering - its sole function is to handle and log traffic that no other rule permits.
Concept tested: Firewall Clean-up Rule explicit deny with logging
Source: https://sc1.checkpoint.com/documents/R81.20/WebAdminGuides/EN/CP_R81.20_SecurityManagement_AdminGuide/Default.htm
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