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In cases like this, please quit the other unnecessary applications running in the background while you are play Warframe (especially torrent software). Most of the time, it could be your torrent client software, such as μTorrent, Tixati, and etc. If you were redirected here by this error, NAT-PMP in use by another program, most likely you have some other program doing NAT-PMP and it is squatting on the network port needed by Warframe. Please open the Gameplay tab and change “Network Ports ” to a set of free ports. (PC Only) To change the ports, open Warframe, press and open the Options. I have searched this up countless times and none of the things suggested to do have worked. Problem is, Ive let it through my router already and my Windows Firewall isnt blocking it. In order to resolve this issue, please either deactivate the program using these ports or change the ports used by Warframe (Port change only available on PC). Ever since the update on the 27th of Feb., Warframe nags at me about my firewalls ports blocking it. It seems like some other program running on your computer is currently using these ports and therefore blocking them for Warframe.
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Since Warframe is much more fun with friends we want to help you sort out your network troubles and get you back in the game! The Warframe network analysis tool detected a problem with your network this could be the root cause of contact list, matchmaking and even voice-communication issues.
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