Garmin HM210DP/DI - Manual (Page 96)

Configuring Firewall Settings
88 EN/LZT 108 6492 R2 - October 2003
11.2.3.1 IP Filter Rule Examples
Example 1 – Blocking a specific computer on your LAN from accessing
web servers on the Internet;
1. Add a new rule for outgoing packets on the ppp-0 interface from any
incoming interface (this would include the eth-0 interface, for
example).
2. Specify a source IP address of the computer you want to block.
3. Specify the Protocol = TCP and enable the Store State setting.
4. Specify a destination port = 80, which is the standard port number
for web servers.
5. Enable the rule by clicking the radio button at the top of the page.
6. Click Submit to create the rule.
7. On the IP Filter Configuration page, set the Security Level to the
same level you chose for the rule, and set both the Private Default
Action and the Public Default Action to Accept.
8. Click Submit to commit your changes.
Example 2 – Blocking Telnet access to the device;
1. Add a new rule for incoming packets on the ppp-0 interface.
2. Specify that the packet must contain the TCP protocol, and must be
destined for port 23, the standard port number used for the Telnet
protocol.
3. Enable the rule by clicking the radio button at the top of the page.
4. Click Submit to create the rule, and commit your changes.
11.2.4 Viewing IP Filter Statistics
To view statistics on how many packets were accepted or denied for a rule,
select Services > IP Filter > Stats in the row corresponding to the rule.
The IP Filter Rule – Statistics page displays: