Chapter 3: AT Commands Reference
April 15, 2008 G24-L AT Commands Reference Manual 3-301
+MIPCFF, Control Filtering Feature for Incoming TCP Connection
The filtering feature aims to protect the G24-L from non-authorized clients trying to establish an
IP connection with it. It is applicable for cases where G24-L communicates as a listener with
others devices.
The filtering feature consists of a "white list" defined per connection. The "white list" can be
configured when filtering feature is set to disable and before connection is established. Once a
connection is established, changes in its "white list" are forbidden.
The following services are provided by the G24-L on behalf the "white list" management:
• Disable/Enable filtering on a connection;
• Add/Remove IP to/from "white list";
• Clear "white list"
After Power-up, the "white list" will be empty and disabled for all connections.
Figure 3-16: CIDR Scheme
White List List of IP addressed that represent devices which
are allowed to establish an IP connection with
G24-L. The white list is defined per connection.
Listen Mode A mode in which the G24-L expects to received
data from the other side.
IP CIDR An efficient way to represent range of
IP_Addresses. It composed of "IPaddr/A", where:
IP_address's format is "AAA.BBB.CCC.DDD",
/A indicates that the subnet mask would start with
A 1 bits.
See Figure 3-16.
