Siemens E-110-I - Manual (Page 68)

SIEMENS ADSL E-110_E-110-I user manual
IP filter rule examples
Example 1. Blocking a specific computer on your LAN from using 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, for example).
2. Specify a source IP address of the computer you want to block.
3. Specify
Protocol eq TCP and enable the Apply Stateful Inspectation setting.
4. Specify Dest Port eq 80, which is the well-known port number for Web servers.
5. Enable the rule by clicking the radio button at the top of the page.
6. Click
[Apply] 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 [Apply].
Example 2. Blocking Telnet accesses to the device:
1. Add a new rule for packets incoming on the ppp-0 interface.
2. Specify
Protocol eq TCP
3. Specify Dest Port eq 23, the well-known port number used for the Telnet protocol.
4. Enable the rule by clicking the radio button at the top of the page.
5. Click
[Apply]. to create the rule.
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