Filter Example
A filter for blocking the web connections from LAN
If you want to avoid the outbound Web request to trigger a call to the remote web server, you can configure a call filter set in Prestige to block this packet. After the call filter is applied, the Web packet will not triggered the call to your ISP or remote node. However, when the call is trigger by the other packets and the Internet connection is established, the workstations then are able to access the Web page.
Before configuring a filter, you need to know the following information:
1. The outbound packet type (protocol & port number)
2. The source IP address
Generally, the outbound packets for Web service could be as following:
a. HTTP packet, TCP (06) protocol with port number 80
b. DNS packet, TCP (06) protocol with port number 53 or
c. DNS packet, UDP (17) protocol with port number 53
For all workstation on the LAN, the source IP address will be 0.0.0.0. Otherwise, you have to enter an IP Address for the workstation you want to block. See the procedure for configuring this filter below.
Menu 21 - Filter Set Configuration
Filter
Filter Enter Filter Set Number to Configure= 1 Edit Comments=
Press ENTER to Confirm or ESC to Cancel: |
Menu 21.1.1 - TCP/IP Filter Rule
Filter #: 1,1
Press ENTER to Confirm or ESC to Cancel: |
Menu 21.1.2 - TCP/IP Filter Rule
Filter #: 1,2
Press ENTER to Confirm or ESC to Cancel: |
Menu 21.1.2 - TCP/IP Filter Rule
Filter #: 1,2
Press ENTER to Confirm or ESC to Cancel: |
Menu 21.1 - Filter Rules Summary # A Type Filter
Rules
M m n |
Menu 11.1 - Remote Node Profile Rem Node Name=
Hinet
Route= IP Call Direction=
Outgoing Edit PPP
Options= No
Press ENTER to Confirm or ESC to Cancel: |
Menu 11.5 - Remote Node Filter
Input Filter Sets: |
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