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16
Static Route
16.1
Overview
This chapter shows you how to configure static routes for your NBG5715.
Each remote node specifies only the network to which the gateway is directly connected, and the
NBG5715 has no knowledge of the networks beyond. For instance, the NBG5715 knows about
network N2 in the following figure through remote node Router 1. However, the NBG5715 is unable
to route a packet to network N3 because it doesn't know that there is a route through the same
remote node Router 1 (via gateway Router 2). The static routes are for you to tell the NBG5715
about the networks beyond the remote nodes.
Figure 70
Example of Static Routing Topology
16.2
The Static Route Screen
Click
Network > Static Route
to open the
Static Route
screen.
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Figure 71
Network > Static Route
The following table describes the labels in this screen.
16.2.1
Add/Edit Static Route
Click the
Add Static Route
button or a rule’s
Edit
icon in the
Static Route
screen. Use this screen
to configure the required information for a static route.
Figure 72
Static Route: Add/Edit
Table 50
Network > Static Route
LABEL
DESCRIPTION
Add Static
Route
Click this to create a new rule.
#
This is the number of an individual static route.
Status
This field indicates whether the rule is active (yellow bulb) or not (gray bulb).
Name
This field displays a name to identify this rule.
Destination
This parameter specifies the IP network address of the final destination. Routing is
always based on network number.
Subent Mask
This parameter specifies the IP network subnet mask of the final destination.
Gateway
This is the IP address of the gateway. The gateway is a router or switch on the
same network segment as the device's LAN or WAN port. The gateway helps
forward packets to their destinations.
Modify
Click the
Edit
icon to open a screen where you can modify an existing rule.
Click the
Remove
icon to delete a rule from the NBG5715.
Apply
Click
Apply
to save your changes back to the NBG5715.
Cancel
Click
Cancel
to begin configuring this screen afresh.
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The following table describes the labels in this screen.
Table 51
Static Route: Add/Edit
LABEL
DESCRIPTION
Static Route
Select to enable or disable this rule.
Route Name
Type a name to identify this rule. You can use up to
printable English keyboard
characters, including spaces.
Destination IP
Address
This parameter specifies the IP network address of the final destination.
Routing
is always based on network number. If you need to specify a route to a single
host, use a subnet mask of 255.255.255.255 in the subnet mask field to force the
network number to be identical to the host ID.
IP Subnet Mask
Enter the IP subnet mask here.
Gateway IP
Address
Enter the IP address of the next-hop gateway. The gateway is a router or switch
on the same segment as your NBG5715's interface(s). The gateway helps forward
packets to their destinations.
Back
Click
Back
to return to the previous screen without saving.
Apply
Click
Apply
to save your changes back to the NBG5715.
Cancel
Click
Cancel
to set every field in this screen to its last-saved value.
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17
Firewall
17.1
Overview
Use these screens to enable and configure the firewall that protects your NBG5715 and your LAN
from unwanted or malicious traffic.
Enable the firewall to protect your LAN computers from attacks by hackers on the Internet and
control access between the LAN and WAN. By default the firewall:
•
allows traffic that originates from your LAN computers to go to all of the networks.
•
blocks traffic that originates on the other networks from going to the LAN.
The following figure illustrates the default firewall action. User
A
can initiate an IM (Instant
Messaging) session from the LAN to the WAN (1). Return traffic for this session is also allowed (2).
However other traffic initiated from the WAN is blocked (3 and 4).
Figure 73
Default Firewall Action
17.1.1
What You Can Do in this Chapter
•
Use the
General
screen to enable or disable the NBG5715’s firewall (
Section 17.2 on page 117
).
•
Use the
Services
screen enable service blocking, enter/delete/modify the services you want to
block and the date/time you want to block them (
Section 17.3 on page 117
).
17.1.2
What You Need To Know
The following terms and concepts may help as you read through this chapter.
WAN
LAN
3
4
1
2
A
19216811.live