Version 6.2
95
February 2011
SIP User's Manual
3. Web-Based Management
Limit traffic to a pre-defined rate (blocking the excess)
Limit traffic to specific protocols, and specific port ranges on the device
For each packet received on the network interface, the table is scanned from the top down
until a matching rule is found. This rule can either deny (
block
) or permit (
allow
) the packet.
Once a rule in the table is located, subsequent rules further down the table are ignored. If
the end of the table is reached without a match, the packet is accepted. For detailed
information on the internal firewall, refer to the
Product Reference Manual
.
Notes:
•
It is recommended to add a rule at the end of your table that blocks all
traffic and add firewall rules above it (in the table) that allow traffic (with
bandwidth limitations). To block all traffic, the following must be set:
- IP address to 0.0.0.0
- Prefix length of 0 (implies the rule can match any IP address)
- Local port range 0-65535
- Protocol "Any"
- Action Upon Match "block"
•
You can also configure the firewall settings using the
ini
file table
parameter AccessList (see ''Security Parameters'' on page
).
¾
To add firewall rules:
1.
Open the 'Firewall Settings' page (
Configuration
tab >
VoIP
menu >
Security
submenu >
Firewall Settings
).
Figure
3-47: Firewall Settings Page
2.
In the 'Add' field, enter the index of the access rule that you want to add, and then
click
Add
; a new firewall rule index appears in the table.
3.
Configure the firewall rule's parameters according to the table below.
4.
Click one of the following buttons:
•
Apply:
saves the new rule (without activating it).
•
Duplicate Rule:
adds a new rule by copying a selected rule.
•
Activate:
saves the new rule and activates it.
•
Delete:
deletes the selected rule.
5.
To save the changes to flash memory, see ''Saving Configuration'' on page
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