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How NAT Reflection works and why it is needed for Cisco Expressway Series solution.

In some deployment of Cisco Expressway series, the Expressway-C and Expressway-E built a Firewall Traversal Connection with Expressway-C pointing to the Public IP 41.1.1.21 of the Expressway-E.

Since the ASA-E is configured with a static NAT so that the Expressway-E is reachable for MRA feature, the problem is that the traffic initiated by the Expressway-C to Expressway-E will be routed to the outside and will never end up at the Expressway-E

This is why we need #NAT Reflection on ASA-C.

Published by:

Redouane MEDDANE

Redouane MEDDANE is Cisco Instructor CCSI #35458, 3xCCNP Collaboration, Security and Enterprise and he a published author of some of the most important OSPF Protocol, Security and Collaboration books in the world titled OSPF Demystified With RFC, Network Security All-in-one, and Dial Plan and Call Routing Demystified on CUCM. He is also a blogger at ipdemystify.com and writes articles about collaboration and security to demystify the most complex topics. His books are known for their technical depth and accuracy especially the OSPF Demystified With RFC book, which is considered as the best OSPF book in the world and named "One of the best OSPF ebooks of all time" by BookAuthority It gives you a hint at the ability to explain complex topics with remarkable ease. He worked as a Cisco Instructor and consultant indifferent Cisco Learning Partner and awarded twice as Cisco Distinguished Instructor Award and Cisco Security Instructor Excellence Award on 2018 and 2019, and Cisco Collaboration Instructor Excellence Award on 2020. The Distinguished Instructor Award recognizes the top 5% of Cisco's most influential CCSI's who provide the highest quality training experience and demonstrate the best overall instructor performance across multiple Cisco technologie and Instructor Excellence Award recognizes the top 25% of elite CCSIs being recognized for delivering top quality training and maintaining high customer satisfaction in their field of expertise.

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