Inscape Data AirEther BR3000 Series, Руководство пользователя

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SB3000 & BR3000 Series User
’
s Manual
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Rev. 1.1 (July, 2012) 97
Netmask: This is a value which when expanded into binary provides a mapping to define which
portions of IP address groups can be classified as host devices and network devices.
Netmask defines the address space of the network segment where device resides. 255.255.255.0
(or /24) Netmask is commonly used among many C Class IP networks.
Gateway IP: Typically, this is the IP address of the host router which provides the point of
connection to the internet. This can be a DSL modem, Cable modem, or a WISP gateway router.
Device will direct the packets of data to the gateway if the destination host is not within the local
network. Gateway IP address should be from same address space (on same network segment) as
the device.
Primary/Secondary DNS IP:
The Domain Name System (DNS) is an internet "phone book" which translates domain names to IP
addresses. These fields identify the server IP addresses of where the device looks for the translation
source.
Primary DNS server IP address should be specified for the device management purposes.
Secondary DNS server IP address is optional. It is used as the fail-over in case the primary DNS
server will become unresponsive.
DHCP Fallback IP:
When device is placed in Dynamic IP Address mode (DHCP Client) and is unable to obtain an IP
address from a valid DHCP server, it will fallback to the static IP address listed here. In case the IP
settings of the devices are unknown, they can be access with the help of the u
Config utility .
The u Config Utility should be started on the administrator PC which resides on the same network
segment as the device.
Device will return to the default IP configuration (192.168.1.20/255.255.255.0) if the Reset to defaults
routine is initiated.
Spanning Tree Protocol:
Multiple interconnected bridges create larger networks using the IEEE 802.1d Spanning Tree
Protocol (STP), which is used for finding the shortest path within network and to eliminate loops from
the topology.
If the STP is turned on, the Bridge device will communicate with other network devices by sending
and receiving Bridge Protocol Data Units (BPDU). STP should be turned off
(selected by default) when the device is the only bridge on the LAN or when there are no loops in the
topology as there is no sense for the bridge to participate in the Spanning Tree
Protocol in this case.
10.2 Bridge mode Firewall Configuration Settings
Firewall functionality on bridge interface can be enabled using the "Enable Firewall" option.
Bridge Firewall rules can be configured, enabled or disabled while using Firewall configuration window
which is opened with the "Configure" button.
Firewall entries can be specified by using the following criteria:
Interface the interface (WLAN or LAN) where filtering of the incoming/passing-through packets is
processed;
IP Type sets which particular L3 protocol type (ICMP, TCP, UDP, P2P) should be filtered;
Source IP/mask is the source IP of the packet (specified within the packet header), usually it is the
IP of the host system which sends the packets;