Free5GC and NAT

Q/A
#1

Does Free5GC support the following phases:

  1. No NAT boundary
    • Phase 1: ISAKMP UDP/500,
    • Phase 2: ESP IP/50 (optional: AH IP/51)
  2. NAT Boundary (NAT Traversal)
    • Phase 1: ISAKMP UDP/500 --> UDP/4500,
    • Phase 2: UDP/4500 (UDP encapsulation of ESP Packet)
#2

Hello, @sabdallah. free5gc supports both phases you mention above, please use the latest version(v1.2.0) of N3IWF.

#3

Thank you for your reply. To make sure that you understand my question, please confirm that Free5gc supports NAT Traversal.

Thank you in advance.

#4

I can point out where to listening UDP port 500&4500. It locate in here. Other informations like how to processing UDP/4500 packets, please search keyword “4500” under folder free5gc/NFs/n3iwf and trace code. Thanks.

#5