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NAT type FAILED on 2 PlayStations

First Timer

Wvmeve had 2 PlayStations for years with no issues. A few days ago we've lost ability to chat in game and join parties. Ps4 is showing NAT type FAILED. Talktalk said there checks are fine. Any help appreciated? Using the new sagecom fibre WiFi box. 

Community Star

If this has happened suddenly, have previously set up some port forwarding and this has somehow got deleted. If you did set this up in the past though, did you reserve their IP addresses on the router? If not these could have changed, stopping the port forwarding from working.

I am not employed by TalkTalk, I'm just a customer. If my post has fixed the issue, please mark it as the Best Answer.
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