RBMTX-Lite Interfaces

The Interfaces page of RBMTX-Lite router is used to manage the device interfaces e.g. DHCP, GSM or LAN interface.

Interfaces

To restart, stop, edit or delete the interface use the buttons on the right of the interface. Use the Add new instance... button at the bottom of the list to add the interface.

Different colors of interfaces indicates different firewall groups. Default is green for LAN and red for WAN. The table below contains information about the interface parameters.

Name	Description
Protocol	Type of interface protocol
Uptime	Working time
MAC	MAC address
RX	Amount of data received
TX	Amount of data sent
IPv4	IPv4 address
IPv6	IPv6 address

Use the Edit button next to the interface to edit it.

DHCP - Edit

General Settings:

Name	Value	Description
Status		Information about Device, Uptime, MAC, IP addresses, RX and TX data
Protocol	DHCP client
Device		Choose the device from the list
Bring up on boot	On/Off, default: On	Set the interface to start on boot
Hostname to send when requesting DHCP	Send the hostname of this device or Do not send the hostname

Advanced Settings:

Name	Value	Description
Force link	On/Off, default: Off	Set interface properties regardless of the link carrier (If set, carrier sense events do not invoke hotplug handlers).
Use broadcast flag
Client ID to send when requesting DHCP	string
Vendor Class to send when requesting DHCP	string
Use default gateway	On/Off, default: On	If unchecked, no default route is configured
Use DNS servers advertised by peer	On/Off, default: On	If unchecked, the advertised DNS server addresses are ignored
DNS weight	number, default: 0	The DNS server entries in the local resolv.conf are primarily sorted by the weight specified here
Use gateway metric	number, default: 0
Override IPv4 routing table	unspecified, prelocal (128), local (255), main (254) or default (253), default: unspecified
Override IPv6 routing table	unspecified, 128 (0), 255 (0), 254 (0) or 253 (0), default: unspecified
Delegate IPv6 prefixes	On/Off, default: On	Enable downstream delegation of IPv6 prefixes available on this interface
IPv6 assignment length	disabled or 64, default: disabled	Assign a part of given length of every public IPv6-prefix to this interface
IPv6 prefix filter	none or local (Local ULA), default: none	If set, downstream subnets are only allocated from the given IPv6 prefix classes.
IPv6 suffix	default: ::1	Optional. Allowed values: 'eui64', 'random', fixed value like '::1' or '::1:2'. When IPv6 prefix (like 'a:b:c:d::') is received from a delegating server, use the suffix (like '::1') to form the IPv6 address ('a:b:c:d::1') for the interface.
IPv6 preference	number, default: 0	When delegating prefixes to multiple downstreams, interfaces with a higher preference value are considered first when allocating subnets.

Firewall Settings:

Name	Value	Description
Create / Assign firewall-zone	dhcp	Choose the firewall zone you want to assign to this interface. Select unspecified to remove the interface from the associated zone or fill out the custom field to define a new zone and attach the interface to it.

DHCP Server:

Use Setup DHCP Server button to confugure this interface.

- General Setup:

Name	Value	Description
Ignore interface	On/Off, default: on	Disable DHCP for this interface.

- IPv6 Settings:

Name	Value	Description
Designated master	On/Off, default: Off	Set this interface as master for RA and DHCPv6 relaying as well as NDP proxying.
RA-Service	disabled (Do not send any RA messages on this interface, server mode (Send RA messages advertising this device as IPv6 router), relay mode (Forward RA messages received on the designated master interface to downstream interfaces) or hybrid mode (Operate in relay mode if a designated master interface is configured and active, otherwise fall back to server mode), default: disabled	Configures the operation mode of the RA service on this interface.
DHCPv6-Service	disabled (Do not send any RA messages on this interface, server mode (Send RA messages advertising this device as IPv6 router), relay mode (Forward RA messages received on the designated master interface to downstream interfaces) or hybrid mode (Operate in relay mode if a designated master interface is configured and active, otherwise fall back to server mode), default: disabled	Configures the operation mode of the DHCPv6 service on this interface.
NDP-Proxy	disabled (Do not send any RA messages on this interface, relay mode (Forward RA messages received on the designated master interface to downstream interfaces) or hybrid mode (Operate in relay mode if a designated master interface is configured and active, otherwise fall back to server mode), default: disabled	Configures the operation mode of the NDP proxy service on this interface.

GSM (SIM1/SIM2) - Edit

General Settings:

Name	Value	Description
Status		Information about Device, MAC, RX and TX
Protocol	Elproma 2G/3G/4G or ModemManager
Bring up on boot	On/Off, default: On	Set the interface to start on boot
Modem device		Model of the modem
APN	string, default: internet	Access Point Name
PIN	4-digit number	SIM PIN lock
Authentication Type	None, PAP/CHAP (both), PAP or CHAP, default: None
PAP/CHAP username	string
PAP/CHAP password	string
IP Type	IPv4 only, IPv4/IPv6 (both - defaults to IPv4) or IPv6 only, default: IPv4 only
Signal Refresh Rate	number	In seconds

Advanced Settings:

The same as: DHCP - Edit: Advanced Settings, except parameter in the table below.

Name	Value	Description
Override MTU	number, smaller than 9200, default: 1500

Firewall Settings:

Name	Value	Description
Create / Assign firewall-zone	gsm	Choose the firewall zone you want to assign to this interface. Select unspecified to remove the interface from the associated zone or fill out the custom field to define a new zone and attach the interface to it.

DHCP Server

The same as: DHCP - Edit: DHCP Server

LAN - Edit

General Settings:

Name	Value	Description
Status		Information about Device, Uptime, MAC, RX, TX, IPv4 and IPv6 addresses
Protocol	Static address
Device		choose the device from the list
Bring up on boot	On/Off, default: On	Set the interface to start on boot
IPv4 address	default: 192.168.1.234/24
IPv4 gateway
IPv4 broadcast	default: 192.168.1.255

Advanced Settings:

The same as: DHCP - Edit: Advanced Settings, except parameters in the table below.

Name	Value	Description
Use custom DNS servers
DNS search domains
IPv6 assignment hint	hex, default: 00	Assign prefix parts using this hexadecimal subprefix ID for this interface.

Firewall Settings:

Name	Value	Description
Create / Assign firewall-zone	lan	Choose the firewall zone you want to assign to this interface. Select unspecified to remove the interface from the associated zone or fill out the custom field to define a new zone and attach the interface to it.

DHCP Server: General Setup

Name	Value	Description
Ignore interface	On/Off, default: On	Disable DHCP for this interface.
Start	number or IPv4 address, default: 100	Lowest leased address as offset from the network address.
Limit	number, default: 150	Maximum number of leased addresses.
Lease time	default: 12h	Expiry time of leased addresses, minimum is 2 minutes (2m).

DHCP Server: Advanced Settings

Name	Value	Description
Dynamic DHCP	On/Off, default: On	Dynamically allocate DHCP addresses for clients. If disabled, only clients having static leases will be served.
Force	On/Off, default: Off	Force DHCP on this network even if another server is detected.
IPv4-Netmask	default: 255.255.255.0	Override the netmask sent to clients. Normally it is calculated from the subnet that is served.
DHCP-Options		Define additional DHCP options, for example "6,192.168.2.1,192.168.2.2" which advertises different DNS servers to clients.

DHCP Server: IPv6 Settings

Name	Value	Description
Designated master	On/Off, default: Off	Set this interface as master for RA and DHCPv6 relaying as well as NDP proxying.
RA-Service	disabled (Do not send any RA messages on this interface, server mode (Send RA messages advertising this device as IPv6 router), relay mode (Forward RA messages received on the designated master interface to downstream interfaces) or hybrid mode (Operate in relay mode if a designated master interface is configured and active, otherwise fall back to server mode), default: disabled	Configures the operation mode of the RA service on this interface.
DHCPv6-Service	disabled (Do not send any RA messages on this interface, server mode (Send RA messages advertising this device as IPv6 router), relay mode (Forward RA messages received on the designated master interface to downstream interfaces) or hybrid mode (Operate in relay mode if a designated master interface is configured and active, otherwise fall back to server mode), default: disabled	Configures the operation mode of the DHCPv6 service on this interface.
NDP-Proxy	disabled (Do not send any RA messages on this interface, relay mode (Forward RA messages received on the designated master interface to downstream interfaces) or hybrid mode (Operate in relay mode if a designated master interface is configured and active, otherwise fall back to server mode), default: disabled	Configures the operation mode of the NDP proxy service on this interface.

Devices

To configure the interface devices choose the Devices section.

Adding/configuring the device depends on the device type.

General device options

Name	Value	Description
Device type	Network device, Bridge device, VLAN 802.1q, VLAN 802.1ad, MAC VLAN or Virtual Ethernet
Base device	br-lan, eth0 or wwan0, default: br-lan
Mode	VEPA (Virtual Ethernet Port Aggregator), Private (Prevent communication between MAC VLANs), Bridge (Support direct communication between MAC VLANs) or Pass-through (Mirror physical device to single MAC VLAN), default: VEPA (Virtual Ethernet Port Aggregator)
VLAN ID	number from 1 to 4094
Device name	string
Bridge ports	eth0 and/or wwan0	Specifies the wired ports to attach to this bridge. In order to attach wireless networks, choose the associated interface as network in the wireless settings.
Bring up empty bridge	On/Off, default: Off	Bring up the bridge interface even if no ports are attached
Existing device	eth0, wwan0 or custom, default: eth0
MTU	number from 576 to 9200, default: 1500
MAC address
Peer MAC address
TX queue length	number, default: 1000
Enable IPv6	On/Off, default: On
IPv6 MTU	number, default: 1500
DAD transmits		Amount of Duplicate Address Detection probes to send

Advanced device options

Name	Value	Description
Ingress QoS mapping		Defines a mapping of VLAN header priority to the Linux internal packet priority on incoming frames
Egress QoS mapping		Defines a mapping of Linux internal packet priority to VLAN header priority but for outgoing frames
Enable promiscuous mode	On/Off, default: Off
Reverse path filter	disabled, Loose filtering or Strict filtering, default: desabled	Accept packets with local source addresses
Accept local	On/Off, default: Off
Send ICMP redirects	On/Off, default: On
Neighbour cache validity	number, default: 30000	Time in milliseconds
Stale neighbour cache timeout	number, default: 60	Timeout in seconds
Minimum ARP validity time	number, default: 0	Minimum required time in seconds before an ARP entry may be replaced. Prevents ARP cache thrashing.
Enable multicast support	On/Off, default: On
Force IGMP version	No enforcement, Enforce IGMPv1, Enforce IGMPv2 or Enforce IGMPv3, default: No enforcement
Force MLD version	No enforcement, MLD version 1 or MLD version 2, default: No enforcement

Bridge VLAN filtering

Name	Value	Description
Enable VLAN filtering	On/Off, default: Off

You can find the VLAN IP and local value in the list or use Add button to add new values.

Global network options

Name	Value	Description
IPv6 ULA-Prefix		Unique Local Address - in the range fc00::/7. Typically only within the ‘local’ half fd00::/8. ULA for IPv6 is analogous to IPv4 private network addressing. This prefix is randomly generated at first install.
Packet Steering	On/Off, default: Off	Enable packet steering across all CPUs. May help or hinder network speed.