*Question:* When the Cisco ASA firewall is placed in between two IPsec routers as shown in the exhibit, which protocol/port number must be allowed on the ASA access list?
*Correct Answer:* UDP port 4500 What about udp/500 ? Isn't it required as well ? It starts on udp/500 and then floats to udp/4500 as per my understanding -- Bruno Fagioli Cisco Security Professional
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