AudioCodes Mediant 4000 SBC User Manual page 169

User's Manual
Parameter
[AccessList_Packet_Size]
Byte Rate
byte-rate
[AccessList_Byte_Rate]
Burst Bytes
byte-burst
[AccessList_Byte_Burst]
Statistics
Match Count
[AccessList_MatchCount]
The table below provides an example of configured firewall rules:
Parameter
Source IP
Prefix Length
Start Port and End
Port
Protocol
Use Specific
Interface
Interface Name
Byte Rate
Burst Bytes
Action Upon Match
The firewall rules in the above configuration example do the following:

Rules 1 and 2: Typical firewall rules that allow packets ONLY from specified IP
Version 7.2
Note: When filtering fragmented IP packets, this field relates to
the overall (re-assembled) packet size, and not to the size of
each fragment.
Defines the expected traffic rate (bytes per second), i.e., the
allowed bandwidth for the specified protocol. In addition to this
field, the 'Burst Bytes' field provides additional allowance such
that momentary bursts of data may utilize more than the
defined byte rate, without being interrupted.
For example, if 'Byte Rate' is set to 40000 and 'Burst Bytes' to
50000, then this implies the following: the allowed bandwidth is
40000 bytes/sec with extra allowance of 50000 bytes; if, for
example, the actual traffic rate is 45000 bytes/sec, then this
allowance would be consumed within 10 seconds, after which
all traffic exceeding the allocated 40000 bytes/sec is dropped.
If the actual traffic rate then slowed to 30000 bytes/sec, then
the allowance would be replenished within 5 seconds.
Defines the tolerance of traffic rate limit (number of bytes).
The default is 0.
(Read-only) Displays the number of packets accepted or
rejected by the rule.
Table 13-2: Configuration Example of Firewall Rules
1
12.194.231.76 12.194.230.7
16 16
0-65535 0-65535
Any Any
Enable Enable
WAN WAN
0 0
0 0
Allow Allow
Description
Firewall Rule
2 3
0.0.0.0
0
0-65535
icmp
Disable
None
40000
50000
Allow
169
13. Security
4 5
192.0.0.0 0.0.0.0
8 0
0-65535 0-65535
Any Any
Enable Disable
Voice-Lan None
40000 0
50000 0
Allow Block
Mediant 4000 SBC