I have tried to restrict IPv4 access with GAE firewall rules but have been unable to restrict access. I tried to restrict access with IPv6 instead of IPv4, and that was successful. In the Creating App Engine firewall rules , IPv4 is listed, but how should I configure it?

CodePudding user response：

Thanks everyone! It seems that the problem was that I was communicating via IPv6 due to my internet connection settings. I was able to block it by changing it to communicate over IPv4!