Go to the "Symmetric NAT Test" page (https://tomchen.github.io/symmetric-nat-test/) and see if you are behind a Symmetric NAT or Normal NAT (Full-cone NAT or other non-symmetric)
Go to the "Symmetric NAT Test" page (https://tomchen.github.io/symmetric-nat-test/) and see if you are behind a Symmetric NAT or Normal NAT (Full-cone NAT or other non-symmetric)