User's Manual Part 2

Using SmartDefense
Chapter 9: Setting Your Security Policy 249
Table 50: Block Known Ports Fields
In this field… Do this…
Action Specify what action to take when the FTP server attempts to connect to a
well-known port, by selecting one of the following:
• Block. Block the connection.
• None. No action. This is the default.
Block Port Overflow
FTP clients send PORT commands when connecting to the FTP sever. A PORT
command consists of a series of numbers between 0 and 255, separated by
commas.
To enforce compliance to the FTP standard and prevent potential attacks against
the FTP server, you can block PORT commands that contain a number greater than
255.