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Page 11 / 33 Scroll up to view Page 6 - 10
Current Status of the DHCP leases
•
Show DHCP Leases
selection shows the current status of the leased IP
addresses by the device’s DHCP server.
Interface name
shows from which device interface DHCP client which has
specified
MAC Address
is connected.
Remaining Lease time
shows for how long the leased
IP address
will be valid
and reserved for particular DHCP client.
The list can be updated using the
Reload
button.
Active Firewall entries in Bridge mode
•
Show Firewall
selection lists active firewall entries in the
FIREWALL chain
of
the standard
ebtables
filter table
, while the device is operating in
Bridge
mode.
The list can be updated using the
Reload
button.
Active Firewall entries in Router mode
Active firewall entries in the
FIREWALL chain
of the standard
iptables
filter table
are listed if the device is operating in
Router
mode.
The list can be updated using the
Reload
button.
IP and MAC level access control and packet filtering in AirOS is implemented
using
iptables
(routing) and
ebtables
(bridging) firewall which protects the
resources of a private network from outside threats by preventing unauthorized
access and filtering specified types of network communication.
More information is provided in the
Link Setup
section.
Active Port Forward entries in Router mode
•
Show Port Forward
selection lists active port forward entries in the
PORTFORWARD chain
of the standard
iptables
nat table
, while the device is
operating in
Router
mode.
The list can be updated using the
Reload
button.
Port Forwarding creates a transparent tunnel through a firewall/NAT, granting
an access from the WAN side to the particular network service running on the
LAN side.
More information is provided in the
Link Setup
section.
Page 12 / 33
Tools
Tools: provides network utilities in pop-up window:
Wireless link throughput estimation with Network Speed Test utility
•
Speed Test
: This utility allows for testing the connection speed to and from
any reachable IP address on the AirOS device network. It should be used for
the preliminary throughput estimation between two network devices. If both
devices are powered by AirOS, the estimation is more precise, otherwise only
rough estimation is provided while using ICMP packet exchange routines.
Access credentials (administrator username -
User
and
Password
) of the
remote system should be provided for the communication between two AirOS
powered devices.
Remote system IP can be selected from the list which is generated
automatically (
Select destination IP
) or can be
specified manually
.
There are 4 options available for the traffic
direction
while estimating the
throughput:
* Estimate the incoming maximal throughput (Rx) while selecting receive
option;
* Estimate the outgoing maximal throughput (Tx) while selecting transmit
option;
* First estimate the incoming (Rx) and afterwards the outgoing (Tx) maximal
throughput while selecting both option;
* Estimate the incoming (Rx) and the outgoing (Tx) maximal throughput at the
same time while selecting duplex option.
Test
Duration
and
Data amount
values can be specified while defining the test
execution time criteria. If both criteria are specified, the test will stop after any
of the criteria is met.
The test is started using the
Run Test
button.
Wireless link quality estimation with Network Ping utility
•
Ping
: This utility will ping other devices on the network directly from the AirOS
device.
Page 13 / 33
Ping utility should be used for the preliminary link quality and packet latency
estimation between two network devices using the ICMP packets.
Remote system IP can be selected from the list which is generated
automatically (
Select destination IP
) or can be
specified manually
.
The size of the ICMP packets can be specified in the
Packet size
field.
Estimation is done after the number of ICMP packets (specified in
Packet count
field) is transmitted/received.
Packet loss statistics and latency time evaluation is provided after the test is
completed.
The test is started using the
Start
button.
Finding the route across the network with Traceroute utility
•
TraceRoute
: Allows tracing the hops from the AirOS device to a selected
outgoing IP address. It should be used for the finding the route taken by ICMP
packets across the network to the
Destination host
.
Resolution of the IP addresses (symbolically rather than numerically) can be
enabled by selecting the
Resolve IP address
option.
The test is started using the
Start
button.
Wireless Site Survey utility
•
Site Survey
: utility will search for wireless networks in range on all the
supported channels while device is operating as
Access Point
or
Station
. In
Station mode channel list can be modified. Refer to the section Link Setup for
the details on channel list customization.
Site Survey will report
MAC Address
,
SSID
,
Encryption
type (if any),
Signal
Strength
,
Frequency
and wireless
channel
used for each Access Point which is
found.
The Site Survey can be updated using the
Scan
button.
Antenna Alignment
Page 14 / 33
Antenna alignment Tool
Antenna Alignment
utility allows the installer to point and optimize the antenna in
the direction of maximum link signal. The "RSSI Range" slider bar allows the range of
the meter to be either increased or reduced. If the range is reduced, the color change
will be more sensitive to signal fluctuations.
Click the
Align Antenna
button and the new pop-up window with signal strength
indicator will appear.
RSSI Range
slider can be used to change an offset of the maximum indicator value.
Window reloads every second displaying current value of the signal strength.
The content of the
Main
page can be updated by using the
Refresh
button.
Link Setup Page
The Link Setup Page contains everything needed by the operator to setup the wireless
part of the link. This includes regulatory requirements, channel and frequency settings,
device mode, data rates, and wireless security.
Basic Wireless Settings
Station Basic Wireless Settings
The general wireless settings, such as wireless device BSSID, country code, output
power, 802.11 mode and data rates can be configured in this section.
Wireless Mode
: specify the operating mode of the device. The mode depends on the
network topology requirements. There are 4 operating modes supported in AirOS v3.0
software:
1.
Station
: This is a client mode, which can connect to an AP.
It is common for a bridging application to an AP. In
Station
mode device acts as
the Subscriber Station while connecting to the Access Point which is primary
defined by the SSID and forwarding all the traffic to/from the network devices
connected to the ethernet interface.
The specifics of this mode is that Subscriber Station is using
arpnat
technique
which may result lack of transparency while passing-through
broadcast
packets
in
bridge
mode.
Page 15 / 33
2.
Station WDS
: WDS stands for Wireless Distribution System. Station WDS
should be used while connecting to the Access Point which is operating in WDS
mode.
Station WDS mode enables packet forwarding at layer 2 level.
The benefit of
Station WDS
is improved performance and faster throughput.
Station WDS - Bridge
mode is fully transparent for all the Layer2 protocols.
Refer to the section Network Settings for detailed Bridge network mode
configuration information.
3.
Access Point
: This is an 802.11 Access Point mode.
AP WDS Basic Wireless Settings
4.
Access Point WDS
: This is an 802.11 Access Point which allows for layer 2
bridging with Station WDS devices using the WDS protocol.
WDS allows you to bridge wireless traffic between devices which are operating
in
Access Point
mode. Access Point is usually connected to a wired network
(Ethernet LAN) allowing wireless connection to the wired network. By
connecting Access Points to one another in an Extended Service Set using the
WDS, distant Ethernets can be bridged into a single LAN.
It is very important that network loops should not be created with either WDS
bridges or combinations of wired (Ethernet) connections and WDS bridges. Tree
or Star shape network topology should be used in all WDS use-cases (i.e. if AP2
and AP3 are specified as the WDS peers of AP1, AP2 should not be specified as
the WDS peer of AP3 and AP3 should not be specified as the WDS peer of AP2
in any case). Mesh and Ring network topologies are not supported by WDS and
should be avoided in all the use cases.
Note:
Station WDS
and
AP WDS
mode uses the WDS protocol which is not defined as
the standard thus compatibility issues between equipment from different vendors may
arise.
MAC Clone
option makes the Station fully transparent while acting as the laptop or PC
which is connected to the AirOS device LAN port (Ethernet interface). MAC of the client
computer is cloned and copied on top of the AirOS device, so it can be made to
connect to the same device and maintain any MAC ID security based privileges from
the server.
MAC Cloning option is effective for one and the only PC connected to the subscriber
station’s LAN port as the station will authenticate and associate to the chosen Access
Point using the MAC address of the PC.
WDS Peers
: WDS Stations and/or WDS Access Points connected to the AirOS
powered Access Point should be specified in this list in order to create a wireless
network infrastructure - Wireless Distribution System (applicable for AP WDS mode
only).
Enter the MAC address of the paired WDS device in the WDS Peer entry field. One MAC
address should be specified for Point-to-Point connection use case, up to six WDS
Peers can be specified for Point-to-Multi-Point connection use case.

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