24 Port Fast Ethernet Web Management Switch User Manual
4.6.2.
TCP/UDP filter
Figure 4-26
This function is also a basic security defense measure
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Function enable: select enable or disable. It is the first step before using TCP/UDP filter
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Port filtering rule: the outgoing packet with selected protocol will be either forwarded or
dropped at secure WAN port as the figure shown below. Negative means the selected
protocol will be dropped and other protocols will be forwarded. Positive means the
selected protocol will be forwarded and other protocol will be dropped.
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Protocol: The protocol item supplies several protocols, including FTP, TELNET, HTTPS,
HTTP etc. Of course you can define protocols yourself
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Secure WAN port: select one or more protocol to drop or forward for selected port. The
port means the port connected between router and switch
E.g
. The router is in port 1 of the switch, and it forbid all PCs’ FTP and TELNET application
that connected to it, the other applications are allowed
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Enable security—TCP/UDP filter
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Select negative in the port filtering rule or use the default value directly
¾
Select FTP and TELNET in the protocol
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Select port 1 in the secure WAN port and click update
Note
: user-defined template will be configured in QOS option
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