TDM-E400 / TDM-C400 ADSL2+ Ethernet Modem Router User’s Manual
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Example 2. Blocking Telnet accesses to the Ethernet Modem
Router :
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.
Viewing
IP Filter Statistics
For each rule, you can view statistics on how many packets were
accepted or denied. Display the IP Filter Configuration page, and
then click
in the row corresponding to the rule. The IP
Filter Rule – Statistics page displays:
Figure 61. IP Filter Rule – Statistics Page
You can click
to reset the count to zero and
to display newly accumulated data.
Managing Current IP Filter Sessions
When two computers communicate using the IP protocol, an IP
session is created for the duration of the communication. The
Ethernet Modem Router allows a fixed number of concurrent IP
sessions. You can view information about each current IP session
and delete sessions (for security reasons, for example).
To view all current IP sessions, display the IP Filters Configuration
page, and then click
. The IP Filter Sessions displays:
