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15xx-A1 Family Router Users Guide
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ALG
ALG, Application Layer Gateway can be used to allow firewall traversal with SIP.
To enable voice
packets to successfully pass through firewalls and NAT, click on the SIP enabled checkbox.
Security
For security reasons, firewall options can be configured only from the LAN side of the router.
IP Filtering
—
Outgoing
Outgoing IP filters block LAN traffic from entering the WAN side. The
Outgoing IP Filtering
Setup
screen will show all outgoing IP filters. Click
Add
to create filters.
The
Add IP Filter -- Outgoing
screen will appear. Add the filter name, source information (from
the LAN side), and destination information (from the WAN side). Then click
Save / Apply
.
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When you
Save / Apply
the IP filter, the
Outgoing IP Filtering Setup
screen appears. The
Outgoing IP Filtering Setup
screen lists the outgoing IP filters, including filters which were
added from the previous screen.
You can view, add or delete outgoing filters. The
Remove
button appears only when you have an
existing IP filter already set up.
IP Filtering
—
Incoming
Incoming IP filter filters the WAN traffic to the LAN side. Click
Add
to add incoming filter settings.
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Enter a filter name, information about the source address (from the WAN side), and information
about the destination address (to the LAN side). Select the protocol and WAN interface, then click
Save/Apply
to add the setting.
You can view and delete the incoming filter settings in the
Add Ip Filter -- Incoming
screen.
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54
When you
Save / Apply
the IP filter, the
Incoming IP Filtering Setup
screen appears. The
Incoming IP Filtering Setup
screen lists the incoming IP filters, including filters which were
added from the previous screen.
You can view, add or delete incoming filters. The
Remove
button appears only when you have an
existing IP filter already set up.
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55
MAC Filtering
MAC filtering can forward or block traffic by MAC address. You can change the policy or add
settings to the MAC filtering table in the
MAC Filtering Setup
screen.
To add a setting to the MAC filtering table, then click
Add
to access the
Add MAC Filter
screen,
then configure the MAC filter.
Protocol type
: Type of protocol to filter.
PPPoE
IPv4
IPv6
AppleTalk
IPX
NetBEUI
IGMP
Destination MAC Address
: the destination MAC address you want to filter
Source MAC Address
: define the source MAC address
Frame Direction
: You can define the direction of the filter.
Options are
LAN TO WAN and WAN TO LAN
WAN to LAN
LAN to WAN
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