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Author: Admin | 2025-04-28
Until it matches a permit ACE and attempts to assign the IPsec security associated with the crypto map. Whenever the packet matches a deny ACE, the ASA ignores the remaining ACEs in the crypto map and resumes evaluation against the next crypto map, as determined by the sequence number assigned to it. So in the example, if Security Appliance A receives a packet from Host A.3, it matches the packet to a deny ACE in the first crypto map and resumes evaluation of the packet against the next crypto map. When it matches the packet to the permit ACE in that crypto map, it applies the associated IPsec security (strong encryption and frequent rekeying). To complete the ASA configuration in the example network, we assign mirror crypto maps to ASAs B and C. However, because ASAs ignore deny ACEs when evaluating inbound, encrypted traffic, we can omit the mirror equivalents of the deny A.3 B and deny A.3 C ACEs, and therefore omit the mirror equivalents of Crypto Map 2. So the configuration of cascading ACLs in ASAs B and C is unnecessary. The following table shows the ACLs assigned to the crypto maps configured for all three ASAs, A, B and C: Security Appliance A Security Appliance B Security Appliance C Crypto Map Sequence No. ACE Pattern Crypto Map Sequence No. ACE Pattern Crypto Map Sequence No. ACE Pattern 1 deny A.3 B 1 permit B A 1 permit C A deny A.3 C permit A B permit A
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