Retro Gamer on Twitter: "For everyone interested in testing the new PS4 Admin. Go to your network settings in your PS4 and set Primary DNS to next IP: 139.99.172.148. Then go to
2021 PS4 and PS5 Best and Fastest DNS Settings Guide | Increase Broadband Speed
裏技】PS4/PS5の回線速度と安定性を上げるDMZ設定とDNS設定の解説 : 魔王の引き出し
GROO on Twitter: "Hey guys, issues with Eir are related to their DNS servers being down or failing. If you change them in the modem settings, it'll start working. Here's a list