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Implicit Behavioral Differences
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Implicit Behavioral Differences
The following table lists the implicit behavioral differences between FWSM and ASA.
| Implicit Behavior | Behavior in FWSM | Behavior in ASA |
|---|---|---|
| Implicit Deny | By default, implicit deny for all IP traffic between interfaces, regardless of security level. | Implicit permit from high security to low security interfaces. |
| ICMP to-the-box deny | Implicit ICMP deny to the interface. | Implicit permit. |
| NAT matching for statistics | Static NAT and static PAT (regular and policy static command) -- Best Match. In the case of overlapping address in the static statements, a warning is displayed, but they are supported. The order of static commands does not matter; the static statement that best matches the real address is used. | Static NAT and static PAT (regular and policy static command) -- In order until the first match. |
