Moxa Technologies MGate 5111, Руководство пользователя

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MGate 5111 Web Console Configuration
4-13
To allow access to a specific IP address
Enter the IP address in the corresponding field; enter 255.255.255.255 for the netmask.
To allow access to hosts on a specific subnet
For both the IP address and netmask, use 0 for the last digit (e.g., “192.168.1.0” and “255.255.255.0”).
To allow access to all IP addresses
Make sure that Enable the accessible IP list is not checked.
Additional configuration examples are shown in the following table:
Desired IP Range IP Address Field Netmask Field
Any host Disable Enable
192.168.1.120 192.168.1.120 255.255.255.255
192.168.1.1 to 192.168.1.254 192.168.1.0 255.255.255.0
192.168.1.1 to 192.168.255.254 192.168.0.0 255.255.0.0
192.168.1.1 to 192.168.1.126 192.168.1.0 255.255.255.128
192.168.1.129 to 192.168.1.254 192.168.1.128 255.255.255.128
DoS Defense
To avoid a DoS attack, some configurations can be set accordingly. They include Null Scan, Xmas Scan,
NMAP-Xmas Scan, SYN/FIN Scan, FIN Scan, NMAP-ID Scan, and SYN/RST Scan. The SYN-Flood and
ICMP-Death can also be set on this page.