Si vous examine the list of outbound rules, vous allez find that the large
majority dun were créé by application, probably at the time
that they were installé. The reason is to assure connectivity for that
app, whatever other rules exist (unless some rule explicitly blocks,
as Block has the precedence over Allow).
This behavior might ont été inspired by Microsoft articles such as
Checklist: Creating Outbound Firewall Rules:
Important: By par défaut, outbound filtering is désactivé. Parce que all outbound réseau traffic is permitted, outbound rules are typically used to block traffic that n'est pas wanted sur le réseau. Cependant, it is a best practice for an administrator to créer outbound allow rules for those applications that are approved for use sur le organization’s réseau. Si vous do this, ensuite you have the option to définissez le par défaut outbound behavior to block, preventing any réseau traffic that n'est pas specifically authorized by the rules you créer.
This seems to say that app-specific outbound rules are good, parce que
they can ensure that this application will continue on fonctionnel
when otherwise it pourrait être blocked by some general filtering.
