「Norton ConnectSafe」はサービス終了済み、代替はOpenDNSが …
Norton ConnectSafe DNS is shutting down — This is what you Aug 15, 2018 Norton ConnectSafe DNS Servers for Safer Internet Method 1 – Using Windows Control Panel Open Control Panel. Click Network and Internet, then Network and Sharing Center. Then click on Manage network In the next window, select your Local Area Connection or Wireless Network Connection, right-click on it and select In the Connection Properties, Remove Norton ConnectSafe from your computer's network Nov 19, 2019 Norton ConnectSafe Discontinued – Scotia Systems Computer
This is not a problem between the G1100 and ConnectSafe. You easily discounted that when you mentioned Google and OpenDNS works correctly. This is actually something that's been known to happen with Norton ConnectSafe and here's a report right here (very first result):
Norton DNS by Symantec - Should I Remove It? Norton ConnectSafe secures your network against unsafe or undesirable Web sites. No additional software is required. There are thousands of infected and fraudulent Web sites on the Internet, with new ones popping up every day. ノートン コネクトセーフ - Wikipedia ノートン コネクトセーフ（英: Norton ConnectSafe ）は、過去に無料で公開されていたDNSサーバーである。 シマンテックの基本的なセキュリティ機能が含まれており、高速で、信頼性の高いWebブラウジングを提供することができると主張している
Google DNS vs OpenDNS vs Comodo DNS vs Norton DNS - Which
Norton ConnectSafe Discontinued : How to Switch DNS Oct 25, 2018 DNS Servers That Offer Privacy and Filtering | Daniel Miessler Feb 06, 2019 Best free and public DNS servers of 2020 Jan 31, 2020 Upgrade Norton ConnectSafe with CleanBrowsing