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The Service Details button.
This is an example of the Service
Details page.
Here you will see the Service
Name / the custom name you
gave a rule.
It lists Protocol (
TCP, UDP, or both)
It also lists the Global Port Range
you want to have opened.
So for the pre-defined rules they
use the common ports used for
those services. But your own
needs may call for different ones.
So just be sure to see what is
being used.
NOTE – there are pre-defined
services for IPSec – IKE as well as
for PPTP which can be helpful for
VPN usage.
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