name: NIMSFW
full_form: Non-IMS Aware Firewall
context: the MN to the CN are carried as IP packets destined to the CN. If RFC 3024 mechanism is used, the packets destined to the CN are tunnelled to the FA using RFC 2003 datagrams. So, if there is NIMSFW present in the Trusted non-3GPP IP access network while using RFC3344 or RFC 3024 based mechanism, the IMS traffic from the UE could be blocked by the NIMSFW thus making it not possible to run IMS services. Similarly, NIMSFW could also block IMS traffic while using PMIPv6 based on RFC 5213. NOTE: 3GPP TS 23.402 [13] has many different architecture scenarios for both roaming and non-roaming scenarios where presence of the NIMSFW could block the IMS traffic. See 3GPP TS 23.402 clause 4.2 (Architecture Reference Model) to get more information on these possible architectures.
description: A Non-IMS Aware Firewall (NIMSFW) is a network component that may block IMS traffic, impacting the delivery of IMS services in various architecture scenarios, including roaming and non-roaming situations.
explanation: The text describes NIMSFW as a network component that can influence communication flows by potentially blocking IMS traffic. This aligns with the definition of a network function, which is a software or hardware element responsible for processing or managing data within a network.
section_title: 5.2.2	Trusted non-3GPP access
biotag_Context: O,B-Network Function,O,O,B-Network,O,O,O,B-Protocol,O,O,O,O,O,O,B-Specification,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,B-Service,O,B-Specification,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,B-Specification,O,O,O,O,B-Network,O,O,O,B-Device,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,B-Network,O,O,B-Network Function,O,O,O,B-Network,O,O,O,B-Protocol,O,O,B-Specification,O,O,B-Specification,I-Specification,I-Specification,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,B-Network,O,O,B-Specification,I-Specification,I-Specification,O,O,O,O,O,O,O,O,O,O,O,O,O
biotag_Description: O,B-Network Function,I-Network Function,I-Network Function,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,O,B-Network,O,O,O,O,O,O,O,O,O,O