IP Aliases
VLAN Network Settings
Multicast routing enabled and Multicast Upstream
Port Forwarding entries can be specified by using the following criteria:
Private IP is the IP of the host that is connected to the internal network and needs to be accessible from the external network;
Private Port is the TCP/UDP port of the application running on the host that is connected to the internal network. The specified port
will be accessible from the external network;
Type is the L3 protocol (IP) type that need to be forwarded from the internal network.
Public Port is the TCP/UDP port of the AirOS v5.3 based device that will accept and forward the connections from the external
network to the host connected to the internal network.
Comments is the informal field for the comment of the particular port forwarding entry. Few words about the particular port
forwarding entry purpose are saved there usually.
Enabled flag enables or disables the effect of the particular port forwarding entry. All the added firewall entries are saved in the
system configuration file. However, only the enabled port forwarding entries will be active during the AirOS system operation.
Newly added port forwarding entries can be saved by activating Save button or discarded by activating Cancel button in the Port
Forwarding configuration window.
Auto IP Aliasing configures automatically generated IP Address for the corresponding WAN/LAN interface if enabled. Generated IP
address is the unique Class B IP address from the 169.254.X.Y (http://en.wikipedia.org/wiki/Link-local_address) range (Netmask
255.255.0.0), which are intended for use within the same network segment only. Auto IP always starts with 169.254.X.Y while X and Y
are last 2 digits from device MAC address (i.e. if the MAC is 00:15:6D:A3:04:FB, Generated unique Auto IP will be 169.254.4.251).
IP Aliases for internal and external network interface can be configured. IP
Aliases can be specified using the IP Aliases configuration window that is opened
while activating the "Configure" button.
IP Address is the alternative IP address for the LAN or WLAN interface,
which can be used for the routing or device management purposes;
Netmask is the network address space identifier for the particular IP Alias;
Comments is the informal field for the comment of the particular IP Alias.
Few words about the alias purpose are saved there usually;
Enabled flag enables or disables the particular IP Alias. All the added IP
Aliases are saved in the system configuration file. However, only the enabled
IP Aliases will be active during the AirOS system operation.
Newly added IP Aliases can be saved by activating Save button or discarded by activating Cancel button in the Aliases configuration
window.
VLAN Network Settings
Enable VLAN: defines the size (in bytes) of the largest protocol data unit the
layer can pass on. When using slow links, large packets can cause some delays
thereby increasing lag and latency.
VLAN ID: The VLAN ID is a unique value assigned to each VLAN at a single
device; every VLAN ID represents a different Virtual Network. In AirOS 5.3 VLAN
ID range values between 2 and 4094 are allowed. AirOS 5.3 only allows for one
VLAN ID per device.
VLAN Network: defines which network interface will be assigned to the specified VLAN ID.
Multicast Routing Settings
With a multicast design, applications can send one copy of each packet and address it to the group of computers that want to receive it.
This technique addresses packets to a group of receivers rather than to a single receiver. It depends on the network to forward the
packets to the hosts that need to receive them. Common Routers isolate all the broadcast (thus multicast) traffic between the internal
and external networks, however AirOS provides the multicast traffic pass-through functionality.
Enable Multicast Routing option enables the multicast packets pass-through
between internal and external networks while device is operating in Router
mode. Multicast intercommunication is based on Internet Group Management
Protocol (IGMP) (http://en.wikipedia.org
/wiki/Internet_Group_Management_Protocol) .
Multicast Upstream: specify the source of Multicast traffic, i.e. defines where
multicast traffic comes from.
Firewall Settings
Firewall functionality on any router interface can be enabled using the "Enable Firewall" option. Router Firewall rules can be configured,
enabled or disabled while using Firewall configuration window that is opened with the "Configure" button.
AirOS 5.3 - Ubiquiti Wiki
http://www.ubnt.com/wiki/AirOS_5.3
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