SMC Networks SMC7004VBR V.2 - Manual (Page 28)

Navigating the Web-based Administration
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[Single IP]
You can only remotely managed the Barricade™
from this IP address on the WAN side.
[IP Range]
You can remotely manage the Barricade™ from
any IP address in this range.
3. Set the Remote Management Port to the port through
which you want to remotely access the Barricade™.
Note: Do not set this for a port that is already in use.
For example, if you are running a web server on
port 80, you can't set the remote admin port to 80.