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System | LAN1

This tab is used to configure the behavior of the RJ45 Ethernet ports labeled LAN or LAN1 on the front of the IP Office control unit.  

Settings

• IP Address: Default = 192.168.42.1
  This is the IP address of the Control Unit on LAN1. If the control unit is also acting as a DHCP server on LAN1 then this address is the starting address of the DHCP address range.

• IP Mask: Default = 255.255.255.0
  This is the IP subnet mask used with the IP address.

• Primary Trans. IP Address: Default = 0.0.0.0 (Disabled)
  This setting is only available on IP412 and Small Office Edition systems. Any incoming IP packets without a service or session are translated to this address if set.

• RIP Mode: Default = None
  Routing Information Protocol (RIP) is a method by which network routers can exchange information about device locations and routes. Routes learnt using RIP are known as 'dynamic routes'. The IP Office also supports 'static routes' though its IP Route entries.

• • None
    The LAN does not listen to or send RIP messages.
  • Listen Only (Passive)
    Listen to RIP-1 and RIP-2 messages in order to learn RIP routes on the network.
  • RIP1
    Listen to RIP-1 and RIP-2 messages and send RIP-1 responses as a sub-network broadcast.
  • RIP2 Broadcast (RIP1 Compatibility)
    Listen to RIP-1 and RIP-2 messages and send RIP-2 responses as a sub-network broadcast.
  • RIP2 Multicast
    Listen to RIP-1 and RIP-2 messages and send RIP-2 responses to the RIP-2 multicast address.
• Enable NAT: Default = Off
  This setting is only available on IP412 and Small Office Edition systems. It controls whether NAT should be used for IP traffic from LAN1 to LAN2. This setting should not be used on the same LAN interface as a connected WAN3 expansion module.
• Number of DHCP IP Addresses: Default = 200, Range = 1 to 999.
  This defines the number of sequential IP addresses, including the Control Unit IP address, available for DHCP clients.

• DHCP Mode
  This controls the control unit's DHCP mode for LAN1. When doing DHCP; LAN devices are allocated addresses from the bottom of the available address range upwards; Dial In users are allocated addresses from the top of the available range downwards. If the control unit is acting as a DHCP server on LAN1 and LAN2, Dial in users are allocated their address from the LAN1 pool of addresses first.   

• Server
  When selected the Control Unit is acting as the DHCP Server on LAN1, allocating address to other devices on the network and to PPP Dial in users.

• Disabled
  When selected the Control Unit will not use DHCP, therefore it will not act as a DHCP server or obtain an IP address from a DHCP server on this LAN.

• Dial In
  This option allows the Control Unit to allocate IP addresses to PPP Dial In users only. It will not allocate IP addresses to local devices on this LAN.

• Client
  The Control Unit obtains its IP Address and IP Mask from a DHCP server on the LAN.

System | LAN2

This tab is used to configure the behavior of the RJ45 Ethernet ports labeled WAN or LAN2 on the front of the IP Office Small Office Edition or IP412 control units respectively. The tab is only shown for those control units.

Settings
The fields available for LAN2 are the same as for LAN1 except for the following additional field:

• Firewall: Default = <None> (No firewall)
  Allows the selection of an IP Office firewall to be applied to traffic routed from LAN2 to LAN1.