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Summary of changes from -00 Old REQ-11 It is RECOMMENDED that a NAT support ICMP Destination Unreachable. a) The ICMP timeout SHOULD be greater than 2 seconds. New REQ-11 Receipt of any sort of ICMP message MUST NOT destroy the NAT mapping. a) The NAT's default configuration SHOULD NOT filter ICMP messages based on their source IP address. b) It is RECOMMENDED that a NAT support ICMP Destination Unreachable messages. |