Strict NAT while playing games

Hi all,
I have a question and need your views on that.
What happens when your ISP gives you private ip to you and you enable upnp on router for LAN side?
Will it work the way it should or will it create problems?
 
If you see my status of teredo you would find out that upnp is properly active ( UPNP: Yes) and has shared an open NAT (Cone flavor) because my internal & external ports are same. If your router assigns different ports on internal & external, your NAT becomes Strict in the xbox networking.
I am on Win10 Pro version where I can control Group Policy by specifying port number, refresh intervals, server name, client type etc. In home version you do not have that option of group policy. But the below is default config where refresh is 34567 seconds. I do not understand why it takes so many seconds by default. It should be 20 seconds as I understand. the server points to an Indian server for teredo of Microsoft.

netsh interface teredo show state
Teredo Parameters
---------------------------------------------
Type : natawareclient
Server Name : win1910.ipv6.microsoft.com.
Client Refresh Interval : 34567 seconds
Client Port : 34567
State : qualified
Client Type : teredo host-specific relay
Network : unmanaged
NAT : cone
NAT Special Behaviour : UPNP: Yes, PortPreserving: Yes
Local Mapping : 192.168.XXX.5:34567
External NAT Mapping : 120.63.XXX.XXX:34567
View attachment 2753
Can you tell me please what's ISP I mean what broadband are you use like airtel jio siit allience which broadband you
 
Faced same problem, solved it, call customer support, tell them to change your public ip coz your NAT is strick. Using pmpl broadband fixed the problem by changing public ip
 


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