Figure 17: Configure Dynamic Defense - Grandstream Networks UCM6510 IP PBX User Manual

Connection
Threshold
Dynamic Defense
Whitelist
The following figure shows a configuration example like this:

If a host at IP address 192.168.40.7 initiates more than 20 TCP connections to the UCM6510 within 1
minute, it will be added into UCM6510 blacklist.

This host 192.168.40.7 will be blocked by the UCM6510 for 300 seconds.

Since IP address 192.168.40.5 is in whitelist, if the host at IP address 192.168.40.5 initiates more than
20 TCP connections to the UCM6510 within 1 minute, it will not be added into UCM6510 blacklist. It
can still establish TCP connection with the UCM6510.
Firmware Version 1.0.1.12
blacklist. For example, if it's set to 300 seconds, the blocked IP address will only
be able to establish TCP connection with the UCM6510 again after 300
seconds.
Configure the connection threshold. Once the number of connections from the
same host reaches the threshold during "Periodical Time Interval", it will be
added into the blacklist. The default setting is 100.
Configure the dynamic defense whitelist. This is a list of IPs that will not be
blocked by the UCM6510.
For example,
192.168.1.3
192.168.1.4

Figure 17: Configure Dynamic Defense

UCM6510 IP PBX User Manual Page 49 of 277