IP range setting is not correct

[chris-joys]

I do some test on this plugin. Using rabbitmq 3.8.8 with erlang 21.3

Following is my IP: IPv4 Address. . . . . . . . . . . : 10.196.33.53 Subnet Mask . . . . . . . . . . . : 255.255.254.0 Default Gateway . . . . . . . . . : 10.196.32.1

I set following content in the advanced.config: [ {rabbit, [ {tcp_listeners, [5672]}, {auth_backends, [ {rabbit_auth_backend_internal, [rabbit_auth_backend_internal, rabbit_auth_backend_ip_range] } ] } ]}, {rabbitmq_auth_backend_ip_range, [ {tag_masks, [{'ip-private', [<<"::FFFF:10.196.33.100/114">>]}]}, {default_masks, [<<"::0/0">>]} ]} ].

user is tester1 with the ip-private tag. I think i should not able to check the exchanges. but actrully i can check it in my computer.

then i change the line to [{'ip-private', [<<"::FFFF:10.196.33.100/220">>]}] I can't get the exchange information now.

I really don't know how the "::FFFF:10.196.33.100/220" works. Why 100/114 will not block my IP and 100/220 block it? I think all of them should block my IP.