Black Box LES1248A-R2 Configuring client devices, Manual Configuration, Dhcp Configuration

IP Masquerading performs Source Network Address Translation (SNAT) on outgoing packets, to make them appear like they've come from the console server (rather than devices on the internal network). When response packets come back devices on the external network, the console server will translate the packet address back to the internal IP, so that it is routed correctly. This allows the console server to provide full outgoing connectivity for internal devices using a single IP Address on the external network.

By default IP Masquerading is disabled for all networks. To enable masquerading:

Select Forwarding & Masquerading panel on the System: Firewall menu

Check Enable IP Masquerading (SNAT) on the network interfaces where masquerading is be enabled

Generally this masquerading would be applied to any interface that is connecting with a public network such as the Internet.

5.8.2Configuring client devices

Client devices on the local network must be configured with Gateway and DNS settings. This can be done statically on each device, or using DHCP.

Manual Configuration:

Manually set a static gateway address (being the address of the console server) and set the DNS server address to be the same as used on the external network i.e. if the console server is acting as an internet gateway or a cellular router, then use the ISP provided DNS server address.

DHCP Configuration:

Navigate to the System:IP page

Click the tab of the interface connected to the internal network. To use DHCP, a static address must be set; check that the static IP and subnet mask fields are set.

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