Configuring Connectivity; Dhcp; Pppoe - Symantec 460R - Gateway Security Administrator's Manual

30 Configuring a connection to the outside network

Configuring connectivity

Configuring connectivity
Once you have determined your connection type, you can configure the appliance to connect to the Internet
or intranet using the settings appropriate for that connection.

DHCP

Dynamic Host Configuration Protocol (DHCP) automates the network configuration of computers. It lets a
network with many clients extract configuration information from a single DHCP server. In the case of a
dedicated Internet account, the users are the clients extracting information from the ISP's DHCP server,
and IP addresses are only assigned to connected accounts.
Your ISP account may use DHCP to allocate IP addresses. Account types that frequently use DHCP are
broadband cable and DSL. ISPs may authenticate broadband cable connections using the MAC (physical)
address of your computer or gateway.
Before configuring DHCP for your WAN ports, you must select DHCP (Auto IP) as your connection type on
the Main Setup window.
To configure DHCP
See
1
2
3
4

PPPoE

Point-to-Point Protocol over Ethernet (PPPoE) is used by many Asymmetrical Digital Subscriber Line
(ASDL) providers. It is a specification for connecting many users on a network to the Internet through a
single dedicated medium, such as a DSL account.
You can specify whether to connect or disconnect your PPPoE account manually or automatically. This is
useful to verify connectivity.
You can configure the appliance to connect only when an Internet request is made from a user on the LAN
(for example, browsing to a Web site) and disconnect when the connection is idle (unused). This feature is
useful if your ISP charges on a per-usage time basis.
You can use multiple logins (if your ISP account allows multi-session PPPoE) to obtain additional IP
addresses for the WAN. These are called PPPoE sessions. The login may be the same user name and
password as the main session or may be different for each session, depending on your ISP. Up to five
sessions or IP addresses are allowed for models 420 and 440 and up to three sessions for each WAN port on
models 460 and 460R. LAN hosts are bound to a session on the Computers tab in the SGMI.
See
Note: Multiple IP addresses on a WAN port are only supported for PPPoE connections.
"Main Setup tab field descriptions"
In the SGMI, in the left pane, click WAN/ISP.
For models 420 and 440, do the following:
In the right pane, on the Main Setup tab, under Connection Type, click DHCP.
Click Save.
For models 460 and 460R, do the following:
To select a connection type for WAN1, under WAN1 (External), in the Connection Type drop-down
list, click DHCP.
To select a connection type for WAN2, under WAN2 (External), in the Connection Type drop-down
list, click DHCP.
Click Save.
"Configuring LAN IP settings"
on page 128.
on page 49.