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6.3.4
ALG
SIP ALG is Application layer gateway. If the user has an IP phone (SIP) or VoIP
gateway (SIP) behind the ADSL router, the SIP ALG can help VoIP packet
passthrough the router (NAT enabled).
NOTE
:
SIP (Session Initiation Protocol, RFC3261) is the protocol of choice for
most VoIP (Voice over IP) phones to initiate communication. This ALG is
only valid for SIP protocol running UDP port 5060.
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6.4 Security
To display the Security function, the firewall option must be enabled in WAN Setup.
6.4.1
MAC Filtering
Each network device has a unique MAC address.
You can block or forward the
packets based on the MAC addresses.
The MAC Filtering Setup screen allows for
the setup of the MAC filtering policy and rules.
NOTE:
This function is only available when in bridge mode.
Instead of MAC
filtering, the other connection types use
IP Filtering
(pg. 62).
The policy
FORWARDED
means that all MAC layer frames will be
FORWARDED
except those matching with any of the specified rules in the following table.
BLOCKED
means that all MAC layer frames will be
BLOCKED
except those
matching with any of the specified rules in the following table.
The default is
FORWARDED
; this is changed by clicking the
Change Policy
button.
Choose
Add
or
Remove
to configure MAC filtering rules.
The following screen
pops up when you click
Add
.
Create a filter to identify the MAC layer frames by
specifying at least one condition below. If multiple conditions are specified, all of
them take effect. Click
Save/Apply
to save and activate the filter.
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Field
Description
Protocol type
PPPoE, IPv4, IPv6, AppleTalk, IPX, NetBEUI, IGMP
Destination MAC Address
Defines the destination MAC address
Source MAC Address
Defines the source MAC address
Frame Direction
Select the incoming/outgoing packet interface
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6.4.2
IP Filtering
IP filtering allows you to create a filter rule to identify outgoing/incoming IP traffic
by specifying a new filter name and at least one condition below. All of the specified
conditions in this filter rule must be satisfied for the rule to take effect. Click
‘Save/Apply’ to save and activate the filter.
Outgoing
The default setting for all Outgoing traffic is
ACCEPTED
.
To add a filtering rule, click the
Add
button.
The following screen will be displayed.
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Filter Name
Type a name for the filter rule.
Protocol
User can select: TCP, TCP/UDP, UDP or ICMP.
Source IP address
Enter source IP address.
Source Subnet Mask
Enter source subnet mask.
Source Port (port or port:port)
Enter source port number.
Destination IP address
Enter destination IP address.
Destination Subnet Mask
Enter destination subnet mask.
Destination port (port or port:port)
Enter destination port number.
19216811.live