Please tell me about the web policy in the firewall rule.

I am a beginner who started using SFVH (SFOS 17.0.6 MR-6) from last week.
Please tell me about the web policy in the firewall rule.

a) Behavior after login button click in DMM.com( https://www.dmm.com/ )
    If Web Policy is "None", clicking the LoginButton(ログイン) will result in an error.
    However, if the Web policy is set to "Allow All", no error will occur and you will proceed to the login screen.

b) Behavior at start of AzurLane( play.google.com/.../details )
    If web policy is "None", Reading does not end after server selection.
    However, if web policy is set to "Allow All", Server selection can not be reached.


Please tell me the difference between web policy "None" and "Allow All".
In order to solve a and b, what kind of information(e.g. log) should be investigated to find the problem and lead to solution?


I'm sorry if it's weird as it translates with google translation.