Sena HelloDevice Pro PS110, Руководство пользователя

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Figure 3-6 SMTP mode selection in SMTP configuration
3.5. IP Filtering
The Pro Series prevents unauthorized access using an IP address based filtering method. The users
can allow one of the following scenarios by changing the parameter settings:
- Any host cannot access a specific service of the Pro Series
- Only one host of a specific IP address can access a specific service of the Pro Series
- Hosts on a specific subnet can access a specific service of the Pro Series
- Any host can access a specific service of the Pro Series
The IP filtering feature is intended to control access to Telnet console, SSH console, NFS, Web server
or each port, which may be enabled or disabled. The factory default of the filtering feature is “All
services and ports are accessible from any host”.
The meanings of each parameter in IP filtering configuration are as follows,

Interface
Apply IP filtering rule to the incoming packet of Pro Series. This is fixed parameter as
eth0(Read-Only).

Option and IP address/mask
Input field to describe a specific range of host on the network. The user may allow a host or a
group of hosts to access the Pro Series. The user must then enter the IP address and subnet of
access. Any user on a remote host must stay in the specified subnet boundary to access the
Pro Series. To allow only a specific host to access the Pro Series, enter the IP address of the
specific host and just give 255.255.255.255 for the subnet with Normal option. To allow any
hosts to have access to the Pro Series, give 0.0.0.0 for both of the IP address and subnet with
Normal option also. Refer to Table 3-2 for more details.