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3. Port Filtering
Port filtering allows you to block or allow TCP/UDP ports to/from specific IP or mac
address. This feature helps you protect sensitive devices and servers from external attacks.
For example, you can block incoming connections to device with IP 192.168.31.122 or with
MAC f8:b5:68:aa:bb:cc. It is also possible to include a range of source and destination ports.
In the following example, all access to FTP, Telnet, SSH and SMTP has been blocked using a
range.
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