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Requirements (cont.) REQ-7: A NAT/FW MUST support Hairpinning" behavior. REQ-7a: A NAT/FW Hairpinning NAT behavior MUST be "External source IP address and port". REQ-8: A NAT MUST have the capability to turn off individually all ALGs it supports, except for DNS and IPsec. REQ-8a: Any NAT ALG for SIP MUST be turned off by default. REQ-9: A NAT/firewall MUST have deterministic behavior. |