Cisco ISDN GW 3241 Manual de usuario descargar pdf (Pagina 69)

Using firewalls

Configuring the video firewall

To configure the video firewall takes a number of steps.

1 First activate the video firewall feature. (This step is not necessary if you purchased your unit with the

feature already activated.) Go to

Settings > Upgrade and see the online help topic “Upgrading the

ISDN gateway”

2 Then configure Port B (assuming that you will use Port A to connect to the local network and Port B to

connect to the Internet; that is the typical configuration. However, you can connect Port A to the

Internet and Port B to the local network but note that you cannot use DHCP to acquire an IP address

on Port B). Go to

Settings > Network B and see the online help topic “Configuring network settings”.

3 Configure IP routes. Go to

Settings > Routes. Select which port will be the default gateway for the

unit and the port for DNS preference. For traffic which will not go to the default gateway (typically

local traffic), create static routes. See the online help topic “Configuring IP Routing Settings”.

Example video firewall configuration

Figure 20 below shows an example configuration for a video firewall solution. The example settings are

shown in Table 3.

The settings in this example are provided as an illustration only. DO NOT USE this exact

configuration.

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Cisco ISDN GW 3241 Manual de usuario Pagina 69