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rules take precedent over Deny rules, so you can create broad
blocking rules then just allow the specific traffic you want.
Port Filter
The Port Filter will block or allow all traffic to a particular port. This is typically
used to block specific applications, like file sharing, IM chat, etc.
Source and destination IPs IP Addresses can be entered in X.X.X.X/N format where N is
the netmask in bits. For example, you can enter values like
192.168.1.0/24 or 192.168.1.254/32. To specify "all" you can
enter "0.0.0.0/0".
Start Port
Enter the Start Port number. Port numbers can be in the range
0 to 65535. The drop down menu gives some sample rules for
typically unwanted subscriber applications. There is no
guarantee that these rules will work partially or completely on
your system, as applications may change ports.
End Port
Enter the End Port Number. Port numbers can be in the range
0 to 65535. This field can be left blank to block a single port as
specified in the Start Port.
Permission
Set the mode of the filter. Deny blocks packets that match the
filter. Allow permits all packets that match the filter. Allow
rules take precedent over Deny rules, so you can create broad
blocking rules then just allow the specific traffic you want.
Note: All Port Filter rules take precedence over all Protocol Filter Rules.
