AudioCodes Mediant 4000 SBC, Руководство пользователя

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CHAPTER 14 Security
Mediant 4000 SBC | User's Manual
3. Configure a firewall rule according to the parameters described in the table below.
4. Click Apply , and then reset the device with a save-to-flash for your settings to take effect.
Table 14-2: Firewall Table Parameter Descriptions
Parameter Description
Match
'Index' Defines an index number for the new table row.
Note: Each row must be configured with a unique index.
'Source IP'
source-ip
[AccessList_
Source_IP]
Defines the IP address (or DNS name) or a specific host name of the source
network from where the device receives the incoming packet.
The default is 0.0.0.0.
'Source Port'
src-port
[AccessList_
Source_Port]
Defines the source UDP/TCP ports of the remote host from where the device
receives the incoming packet.
The valid range is 0 to 65535. The default is 0.
Note: When set to 0, this field is ignored and any source port matches the
rule.
'Prefix Length'
prefixLen
[AccessList_
PrefixLen]
( Mandatory ) Defines the IP network mask - 32 for a single host or the
appropriate value for the source IP addresses.
■ A value of 8 corresponds to IPv4 subnet class A (network mask of
255.0.0.0).
■ A value of 16 corresponds to IPv4 subnet class B (network mask of
255.255.0.0).
■ A value of 24 corresponds to IPv4 subnet class C (network mask of
255.255.255.0).
The IP address of the sender of the incoming packet is trimmed in
accordance with the prefix length (in bits) and then compared to the
parameter ‘Source IP’.
The default is 0 (i.e., applies to all packets). You must change this value to
any of the above options.
Note: A value of 0 applies to all packets, regardless of the defined IP
address. Therefore, you must set the parameter to a value other than 0.
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