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 HSA300 User Manual
116
able to access FTP Internet sites (and any others that use
destination port numbers other than 80).
Example 2. Blocking Telnet accesses to HSA300:
1. Add a new rule for packets incoming on the ppp-0 interface.
2. Specify that the packet must contain the TCP protocol, and
must be destined for port 23, the well-known port number
used for the Telnet protocol.
3. Enable the rule by clicking the radio button at the top of the
page.
4. Click
to create the rule, and commit your
changes.
Figure 57 shows how this rule could be configured:
Figure 57. IP Filter Rule Example 2